When did gm switch to r134a. When charging the high side on.
When did gm switch to r134a That being said I use a 93-95 G20 van R134a switch in the R134a trucks. 8L Turbo. Anything 96 Jun 8, 2013 · The HPCOS kit (p/n 15981985) contains the switch, wire harness, heat sealing splice connectors, switch O-ring, and installation instructions. However you will need to change the compressor, receiver/dryer, condenser, orifice, o' rings and service valves. You will need to buy a set of adapters for the service ports so you can charge and attach your gauges - if you have them. UPC: Product Features. A trinary witch could be added and function as a LPCO a HPCO and as a condenser fan switch. R-134a O-rings are blue or green in color. The refrigerant is supposed to be more environmentally friendly, BUT is A LOT more expensive. May 9, 2003 · So if you have plans to own any older BMWsjust know that the 1993 model year is when they switch from R12 to R134a. 2014 Chevy Cruze Diesel - MSR 013 17" wheels, Black Bowties, UR Rear Lower Bar Nov 13, 2009 · Change the oil in the compressor, change the drier (aytime you open the system, change the drier-cheap insurance), get a couple of charge port adapters. This answer is: Nov 8, 2019 · I'd like to get the AC working for next summer and wanted to get a head start on it now. However, the unit is still soaked in the original mineral oil, and I know that mineral oil is not R134a compatible at all. See answer (1) Best Answer. Others say I need to change the compressor. Jul 6, 2012 · The A/C system in many older vehicles needs to be converted from R12 refrigerant to R134a refrigerant. – Model Year Consideration: The model year of the vehicle is an important factor. From the research I’m doing, my understanding is that to convert the system properly you need to change the fittings to R134a fittings, vacuum any existing refrigerant from the system Jan 1, 2021 · What year did r134 replace R12? 1995 R12 and 134a are refrigerants used in car air conditioning systems. (Price can change at any time. When R134a replaced R12 it solved the issue of depleting the ozone layer but R134a still has a very high global warming potential (GWP) of 1,430 which means that one pound of R134a released into the atmosphere causes the same amount of global warming as 1,430 pounds of CO2 released May 17, 2018 · 1973 - 1979 F-100 & Larger F-Series Trucks - R12 to R134a conversion - Has anyone done an R12 to R134a refrigerant conversion? I have a 76 Ford f150 and was wondering what it was going to take to change it to R134. Dec 15, 2020 · The odd thing was before the CCOT system came to the heavy trucks GM used three different systems, Astro’s, General’s and Brigadier’s had different types of throttling for controlling the flow of R-12 to the evaporator. Flush everything and replace the orifice tube. Category. A vaccum is not going to pull the oil from the system. The first 6 were built with the 6 cylinder 3 carbed Blue Flame 235 w/ Powerglide and 6 volt systems. Nov 26, 2008 · I believe it was sometime in the mid 90's that GM switched over to R134a as a factory fill in the A/C. #Moby the Lowered Squarebody Crewcab Dually gets the FULL A/C May 2, 2019 · I did swap out the low pressure cycling switch and from the standard . 99 Oct 12, 2022 · Due to environmental concerns, R12 is no longer widely commercially available, having been replaced by R134a. FAQS: R12 to R134a Capacity Conversion. com, and most are compatible with R134, but not everything. That worked. see post #7 in link below May 18, 2014 · Hi, All--I read somewhere that the government mandated the use of r134a in all US vehicles in the early '90's, like around '92 or '93 At that time, I had a brand new '92 Buick Skylark company car that had r134a in it, and lived in Phoenix; needless to say, it was not a good combination--i. We did it the hard way -- with stock lines built to R134a specifications, after hearing that this is how it is commonly done at DeLorean shops. I've purchased a new compressor to put on this second time around, but when I did the retrofit the first time around, I bought a new Make sure the A/C system blows ice cubes! We go over inspection and repair of every component. If you are using a R4 radial or V5 compressor, you need a heavier weight oil like ACDelco 15-100 PAG oil with a viscosity of 100. When charging the high side on Oct 5, 2012 · Change the receiver dryer and as much of the oil as you can get out. Oct 14, 2022 · We sometimes receive questions from owners wondering what type of refrigerant is in their air conditioning system. 8 degrees with R12, and that R134a will only drop to about 29 degrees at the stock 25 PSI cycling pressure. Jun 25, 2020 · Joined Jun 25, 2020 Posts 1,114 Reaction score 2,324 Location Texas First Name Txr10 Truck Year 1987 Truck Model R10 Engine Size 305 May 27, 2018 · On older trucks some folks switch to a Ford blue orifice, which might work better than the GM white orifice. In this video I show what parts I removed from the truck and how I removed them. May 30, 2011 · 1987 - 1996 F150 - A/C Pressure Switch: R12 vs R134a - Part Numbers Are Different - I retrofitted my truck awhile back and the a/c is not blowing anywhere as cold as it should be. Aug 11, 2019 · The other hardest part is getting the new A/C lines in. A saddle clamp adapter (p/n 15985307), or a special dual fitting, is mounted to the high pressure line, and provides the port to mount the switch. As usual the proper parts are NOT included. However, I’m not sure whether a 1990 uses a TXV or an orifice tube. Fits all vehicles 1976 – 1995 including GM models 1991 and up ; For conversion of R12 to R134a ; Includes retrofit label › Mar 30, 2013 · The Griffiths guys said the stock condenser is a little undersized for R134a, and if you really want to match the R12 performance you have to replace the condenser (I didn't and it is good enough). You may find one or two of your hoses leak with 134. Replace this hoses if that is the case. 7 percent compared with R134a. All good. Jun 6, 2016 · R12 and R134a pressures. May 21, 2024 · according to rockauto "off" is 25, and "on" is 49. Then I did the same to my ‘89 Buick retrofitted to R134a with it's original switch and I got a 10 degree increase in cooling. Car manufacturers have issued TSBs about R134a retrofits that describe needed parts and modifications, including any upgrades to the radiator fan or fan shroud. g. 54. Aug 10, 2018 · If your vehicle uses R134a refrigerant, you won’t have to make the change. The adapters included in the kit are one high side 7/16 inch port, one high side for a 2-piece GM port, one high-side ⅜ inch port, and one low side 7/16 inch port. It hasn't worked ever since I got it (compressor would cycle rapidly 3 years ago, nothing now), and I'd like a little comfort on those 90+ degree days. I switched to a Sanden compressor for R134 but I'm told the GM ones work. 1986 OLDSMOBILE CUTLASS SUPREME 5. Now the A/C works normally and well. Diagnosis of the air-conditioning system can be done in the same way as with R134a. . I am wanting to keep as much of the vintage AC Delco system as possibe, but also want to convert the AC to the R134a. Fitting change in 94 up. The new compressor has a high-pressure blow out disc. 65 Dec 23, 2022 · It is R134a. I put this orifice tube (expansion valve) in when I did the conversion and it works Oct 7, 2020 · Buy R12 To R134a Conversion Kit, with Dust Cap, R12 R22 R502 to R134A Fast Quick Conversion Adapter Switch, Adapter Valve 1/4Inch SAE Low Side Port Adapter, R134A Quick Coupler Interface, and Core Valve: Air Conditioning Line Repair Tools - Amazon. As a result, a perfectly functioning R12 system will blow colder and reduce temperatures faster than a system that was converted to R134a Jun 19, 2018 · I would pull and drain the unit. The truck as it sits has R-12 in it, or at least, it had it in it. [FITMENT] Professional grade retrofit valve adaptor for automotive air conditioning systems converting from R-12, R-22 to R-134A Quick Disconnect Coupler. In fact, R-12 is where the brand name of Freon comes from. Jan 10, 2016 · Okay, so first off, no one I know that has done a R12 t0 R134 change out, at least by just replacing the r12 with r134a has been happy. Climate change is a highly contentious topic Jun 14, 2021 · Decide if you’re converting to R134a: If the system is intact, you need to decide if your basic approach is a) Get it leak-free and recharge it with the original R12 refrigerant, or b) Convert it to R134a and perform the recommended compressor and condenser upgrades. 800-426-6867 Apr 9, 2008 · Why switch to R134a and suffer all the added modification expense, reduced cooling performance and long term reliability headaches? R12 is $25 a can on ebay and you need only 2 1/2 cans. May 4, 2021 · I'm not a huge fan of R-1234yf, but saying it's a "step backwards in an environmental sense" is just plain wrong. com FREE DELIVERY possible on eligible purchases Aug 26, 2024 · By applying the above formula, you will be able to have the accurate R134a charge. The R12 compressor design ports are even. I learned that an R134a system requires only 80% of what an R12 system requires. Change the fittings or put on adapters and charge it up. R134a Retrofit. R1234yf has a GWP of only 4 and reduces global warming impact by 99. 6) New barrier-style hoses for pre-1990 vehicle. All other compressors (GM / Sanden / Diesel Kiki) use the new ACDelco 15-118 with a viscosity of 46. R134a refrigerant (amount varies by model Apr 12, 2017 · In 2014, Fiat Chrysler began filling the air conditioning systems on almost all of its models with R1234yf refrigerant. Save Share Part 1 of my AC conversion from R12 to R134a. It operates at r134a pressures and should fit right into your air dryer. R-12 O-rings are black in color. The autozone part number was the same for both models (38623). We definitely recommend reading more May 29, 2012 · Evacuate, leak check (system should hold 28" Hg overnight) and charge with about 50 ounces (4 cans) of 134a. Type: Pressure Color: Black Fitting: 7/16-20 F Normal: Open Closed: 44psi Open: 24psi OEM: 52458249. Jun 14, 2010 · Did you change the oil out to Ester? Charlie-did you go to school for Ac or back yard mechanic, at 45 psi the refrigerant temp is already at 50*-I set mine up at 30 psi where refigerant temp is about 35*. but ive heard that doing this requires a little more. Experience the transformative power of a cooler, more efficient air conditioning system in your Corvette with an Conversion Kit. They did make an exception for vehicles that are specifically manufactured for export out of the country. '84 K10, 400 sbc with factory AC. e. 25 lbs , so I'm going to start with 3. Sometimes this is a non issue but if the cycle switch is bypassed or set too low it will never cycle. 95. Now, A/C is fully charged but compressor cycles rarely (usually off) and it's getting hot here in Texas. Jul 12, 2022 · Use a cycling switch for your year truck meant for R134a. 6L engine, the A/C system Refrigerant (R-134a) Charge capacity is 2. Study now. Aug 27, 2012 · I can't speak about the V6. The goal is for all vehicles with the model year of 2021 to use an alternative refrigerant in place of 134a. R12 was used in most cars and trucks until 1995 when it was replaced with 134a. Jul 7, 2015 · According to the EPA’s announcement the chosen date for mandatory R-134a phase out is the year 2020. May 17, 2024 · Based on the search results, it appears that Chevrolet switched from using R-12 refrigerant to R134a refrigerant sometime after the mid-1990s. $9. Other than new car manufacturers over the last few years having switched to 1234yf, it’s remained in use ever since. Mineral oil isn't compatible with R134. The previous owner said it did not work the two years she owned. I presume you have a set of gauges to complete the process. Aug 11, 2019 · Low pressure switch (100744) High pressure switch (106917) High pressure switch harness (110526), as the early VINs didn't include a high pressure switch at all. MOTOR Information Systems 1301 W. Pressure relief LVL (106918) Condensor adaptor (110527) Most of the parts are available from store. I would also use dry nitrogen to blow thru the evap that you plan to reuse. Mar 19, 2015 · This list of late-model vehicles includes all the auto manufacturers that have implemented the use of R-1234yf refrigerant in their vehicle A/C systems. long story Oct 28, 2004 · The GM HVAC engineers that developed the systems for R12 and R134a recommend that systems that are converted from R12 to R134a should be charged to the same capacity with R134a as they were specified for with R12. R134a is lighter than R12. Due to age, absolutely change the oriface tube and the drier. Some vendors sell split lines, while others sell assemble-it-yourself lines to make this easier. Before I did this, I had a brand new compressor blow that switch out the back of the compressor - sounded like a shotgun going off! GM supplies various saddle clamp ports to add the HPCO switch. May 8, 2023 · After the freon used in A/C units was blamed for depleting the ozone layer, automakers were required to switch from R12 to the less harmful R134a refrigerant by 1996. Replace the Low Pressure Cutout Switch with one calibrated for R134a. 1 out of 5 stars 3 ratings | Search this page . 99. Mine cycles just at 42° when it is below 80° outside. An ozone-friendly alternative, R134a is an efficient absorber and carrier of heat, and contrary to popular belief, most cars originally equipped with R12 can be converted to 134a and still keep you just as cool. 99 $ 9. Apr 14, 2013 · R134a refrigerant O-rings are of a different composition than those for R12 systems. GM expects most models to have R-1234yf by late 2016. This is a 1993 Chevy Silverado Mar 4, 2022 · R-1234yf refrigerants for mobile air-conditioning systems have been widely used in passenger vehicles the past several years, but they are just now gaining traction in medium- and heavy-duty commercial vehicles. Another says I need to change drier and orifice tube. The system must be purged professionally to remove all the R12 oil and freon. 75 lbs of R-134A B ⇒ Liquid Level Switch w/ Brad Harrison Connection. Ester oil charge for lubrication (amount varies by model year). Anyone know what year that happened? Mar 27, 2024 · – Transition Period: The transition to R134a refrigerant in Chevrolet vehicles began in the early 1990s, with some models already using R134a in 1993 and most vehicles fully switched over by 1994. I want to change from R12 to R134a in my 88 GT. GM R134a Cycling Pressure Switch. You will need: A/C Manifold Seal Kit Part #: 15-20058 GM Part #: 02724887 Feb 29, 2016 · Ford begins its switch in April. Replace the fittings with R134a fittings 5. Some say all I have to do is change the fittings and put in different oil. I go to put the 134a in and it takes forever (15 min) to get the 3. Feb 5, 2015 · The change started in 2014 which appears to include the later production year 2014 models. News. I have asked a couple of local parts guys, ASE techs and I am getting different answers. Jul 13, 2007 · That's why they were flammable. 4) R134a pressure switches. May 14, 2024 · On the 2015 Chevy Traverse with the V6-3. I just looked it up online at rock auto and compared pictures to my switch. You need to replace the drier and all o-rings with the newer R134 style o-rings. R12 lines are rumored to leak R134a not sure how true that is but it's cheap insurance. 4. '01 TJ, '14 WK Nov 30, 2018 · What’s behind the Switch to R-1234yf and what Exactly Does it Mean for Techs? Date November 30, 2018. Aug 1, 2019 · I have a 1992 K1500 I’m wanting to convert to R134a, the system hasn’t been run in I want to say 2-3 years. Feb 5, 2018 · VPG102 AC Clutch Cycling Switch for GM (R134a) Visit the CLIMAPARTS Store. You can easily do it for both lbs and oz. It is the older style with the adjustment screw between the terminals. The only issue with R134a is that it doesn’t work to cool air as well as R12 does. Jan 18, 2022 · Evacuation – Using R134a equipment, evacuate the A/C system for a minimum of 40 minutes at the vacuum of -100kPa. The rest of the time it is trying to get down to that temperature engaged all the time. Jul 5, 2018 · R-134a: Three twelve ounce cans are for sale right now at $19. That figuring out to 3. Examine the screen on the old orifice tube when you remove it; one or two small flakes of metal are considered normal, but more than that suggests that flushing the system would be a Comfortable and Enjoyable Ride. 1 4. Thus you need a large condenser to shed that latent heat from the R134a refrigerant. And Mercedes is fitting an onboard fire-suppression system to allay engineers' fears of potential fire danger. com May 25, 2015 · Seems I remember from an AC repair site I used to frequent back when many conversions were being done, the hot setup was to use a Blue "Ford" orifice in GM stuff converted to R134a. I never used that orifice, but did install several of the variable orifice valves VOV in OT conversions. Is R12 better May 28, 2013 · The R134a compressor has a 1/8" step in on the high side port. Can I simply replace R12 with R134a in my system? May 4, 2022 · Hello Ed; I changed my 1990 Riviera from R12 to R134A and it was very straight forward to do. Mar 17, 2015 · I live in Austin, TX where summer time temps reach 100+ very regularly. K. Jun 29, 2020 · In the video, I explain how the factory AC system operates and what's needed to update the system for R134a. There is no refrigerant in the… May 19, 2014 · Converted my 1989 SHO from R12 to R134a last year. Just a thought. Nov 12, 2006 · C3 General - Air Conditioning Conversion Kit, R12 To R134A - Has anyone done the Air Conditioning Conversion Kit, R12 To R134A? I see a kit comes with a compressor and dryer plus all the seals. I thought the GM switched had a screw adjustment between the to plug blades for that purpose. 90% of the original R12 charge quantity e. 5) R134a orifice tube. 55 FOUR SEASONS 59986 A/C Compressor Fitting for R134a Conversion $ 9. Has anyone done one of these and got it right. The reason is mostly the condenser. Also upgrade to a high pressure cut-off switch. Cars manufactured prior to 1995 originally came with R-12 Freon, a refrigerant that was discontinued due potential ozone damage. 6L with a 3speed auto. – SAE J2843 certified equipment (GE-50300) requires a SAE J2913 leak detector to perform the mandated gross leak check. Here’s how to convert R12 to R134a with the factory method Jun 16, 2008 · a/c conversion the way weve done conversions in our shop is change dryer & orfice tube i have always use (white gm) pickup any part store cant say differance in (blue,orangeor red)ford orfice, flush system can buy kit at part store use with shop air dont use straight shop air because of water in air lines drain oil out of compressor put about 8oz ester oil in whole system, r12&r134a oil are Jun 18, 2016 · R12 was cycled at slightly lower pressures than r134. Mar 16, 2016 · Dry System and Dry GM A6 Compressor will be 11oz. The Camaro condenser is fine also. 2 - I replaced the low pressure switch on my ‘75 GMC and did not have trouble finding one. i want to change it to r-134a so i can actually recharge it and make the air conditioning run colder. However, due to environmental concerns, the production and use of R12 were phased out and replaced with R134a. Try to recharge the system with R134a 6. Aug 4, 2022 · In this video I explain all the parts necessary to replace the old R12 ac system in a 1988-1993 chevy/gmc c/k series trucks. Apr 16, 2009 · I'm in the process of re-installing the A/C components in my 85 Cutlass and also converting from R12 refrigerant to R134a refrigerant. Explanation of controls 0-10:20 Driving test 10:20-12:55 Underhood components & purpose 12:55-25:36 Whats needed to use R134a 25:35-33:32 Factory AC vs aftermarket 33:32-end [video=youtube_share;jNUb-GDWz4Y] Oct 21, 2022 · What year did gm change from freon? Updated: 10/21/2022. I have a 1988 Chevy C1500 with inoperative A/C. Charging – Charge the A/C system with R134a to approx. 0# of refrigerant. : first year for the changeover, so not all the engineering bugs were worked out, and between 110 and Oct 14, 2022 · This question from a 1970 Imperial owner brings up another issue common with Dodge, Plymouth, and Chrysler classic cars when converting those air conditioning systems from R12 Freon to R134a refrigerant. Dec 13, 2016 · As of the year 2020, or 2021 model year, light duty vehicle manufacturers will no longer be able to use R-134a in their new automobiles. Im not a fan of 134a but with the avalibility of r12 as scarce as it is compared to r134a i would make the switch. Many ’60s and ’70s American cars had some of the most overbuilt A/C Jun 18, 2016 · R12 was cycled at slightly lower pressures than r134. This video shows you how to convert your vehicle's A/C Mar 21, 2021 · I decided that I was going to re-seal the unit for use with R134a (I am converting the system to R134a, all the R12 leaked out decades ago). I am using a variable orifice tube on my 97 Express and it seems to work a bit better than the standard one did. And for those of you that don't knowR134a is going the same way as R12. 067" orifice, R134a Rear Expansion Valve, New Parallel Flow condensor, New Barrier hoses, DA6 compressor, Adjusted Cycling switch to 24 psi, etc) my G-Van would get down to 55*F on a long highway drive from both units. R-12 was one of first mainstream refrigerants used throughout the world. Use nitrogen to push the flush through. It is fairly easy to convert vintage cars from the 1990s to R134a. Most manufacturers will end up going with the HFO refrigerant known as 1234YF. heres my problem though, to me it looks as simple as draining the r-12 that is in the system, change the convert r-12 fittings to the 134a and recharge with the r-134a. I'm still not sure about the 3/4 tons, or if the 3/4 ton LD (6 lug) came around at the same time as the regular 3/4 ton (8 lug). When did R12 change to R134a? Most cars built after the year 1994 use R134a. Because R134a didn't have same evaporative capacity as R12 their respective evaporator and condensers are different. 44 inch port, one high side . The amount of R134a charge will be approximately 70-80% of the original R12 amount, and any sight glass won't accurately indicate full charge. This R12 to R134a conversion kit contains 4 items. When did GM switch to R134a? Until 1995, most cars with air conditioning used R-12 Freon refrigerant which has shown to have an environmental impact. Jul 30, 2016 · The original R12 system called for 3. Long Lake Road, Suite 300 Troy, MI 48098. you will also want to replace all O-rings, and get the 134a service adapters. Also the differences between the R12 and R134a had to do with capacities in the evaporator core, condensor and the orfice tube. It constantly cycled and cooling would instantly stop when it kicked off. 38 inch port and 1 high side for 2 piece GM port. You can also use PAG (Poly Alkylene Glycol) or Castrol Retro Oil for lubricant. 8 degrees with R134a the switch needs to be set to cycle at about 23 PSI. Now, you do need to change out the accumulator and orifice tube, flush the lines, and vacuum the heck out of it. It was an original AC car. The InterDynamics Certified AC Pro Car Air Conditioner Adapter Kit is one of the R12 to R134a conversion kits preferred by car This is Final video of the Ac conversion from R12 to R134a on my 1993 Chevy Silverado. In my past experience with converting R12 systems to R134a it just doesn't cut it in Austin. Products / Automotive A/C / Switches / GM R134a Cycling Pressure Switch. The exact year of the switch may vary depending on the specific Chevrolet model. One can run R134a through a system designed to use R12 but the A/C will not be as cold. Apr 26, 2018 · 3) R134a retrofit kit with R-134a port adapters, oi, port caps, and retrofit label. For example, you only need to change the compressor lubricant of a vehicle that features R134a-compatible seals, compressors, and barrier-style hoses. original R12 1000 grams, R134a retrofit charge 900 grams. Jul 7, 2005 · I thought that I had heard the same thing, but when I converted my 92 system to R134A, I checked part number and availability on the autozone web site for my 92 (orginally R12) and for a 95 (R134A). Jan 11, 2012 · O. 1987 Buick Regal 3. After that the system will have enough pressure to allow the low pressure switch to operate normally and keep the compressor running. Jul 8, 2012 · C1 & C2 Corvettes - '66 R12 to R134a Conversion ? - I have a '66 with factory air. It would probably get a new condenser, maybe a new evaporator. What year did GM stop using R12 refrigerant? 1995, was the last year for most cars. I dug through Mike Garrison's skylark graveyard a couple years ago and and got all the missing components. The new compressor I got from the auto parts store (a Four Seasons brand) did not have this switch on the back. You will have to jump your low pressure cut-out switch to get the first 2 cans in. Apr 23, 2013 · Fill and leak test or take to shop. Apr 5, 2006 · The compressor had stopped turning on or when it did happen to turn on it would almost immediately turn off again. Jun 28, 2015 · R12 retrofit to R134a requires PAG oil with two type depending on compressor used. The adapters just screw on to the existing service ports. The GM r4 compressor isn't hooked up but it's probably junk at this point, am planning on chucking it and going with a sanden. Manufacturers may even classify putting R134a in a car that came with 1234yf as emissions tampering — particularly if they count air conditioning credits toward light-duty greenhouse gas Jun 9, 2020 · When did auto AC change to R134a? R-134a first began to see widespread usage in 1992 and took over the automotive market entirely in 1994. 0L 307cid V8 FOUR SEASONS 55479 A/C Refrigerant Hose Assembly $ 85. 134a kits remove a higher heat load from the interior, so it is extremely important for the fan clutch and condenser to be in excellent condition on any 134a conversion. However, if your car has the new refrigerant, you’ll have to stick with it. Get decent conversion fittings, a new orifice tube (either variable orifice or sized specifically for R134a), R134a barrier hoses, R134a compatible seals, adjustable LPCO (low pressure cut out) switch, and new sealed dryer/accumulator. The HPCO switch is Gm PN (15981985), Delco PN (15-5514) and a saddle clamp to mount it on PN 15985307. The first automobile air conditioners used R12 as a refrigerant. 10 votes, 10 comments. The service manager said he didn't have to change anything but the refrigerant and "maybe a few small parts", whatever those might be. I did it. O. I think a high pressure cut out switch is a worth while safeguard. Shop air too often has moisture in it. I had a Chevette, 1980 1. I'm thinking I should try to replace the compressor cycling switch with the R134a switch, but I'm not sure what p/n. I did and do have real doubts about simply replacing the R12 refrigerant with R134a. Jun 3, 2015 · I did the 134 POA adjustment to 26 PSI on my 70 Chevelle and installed a brand new GM compressor along with drier, seals, and hoses (not a reman) and it worked great the entire time I was running it. With every trick in the book (Ford Blue . Mar 22, 2004 · The evap is the same 134A or 12. Copy. Warning! Never Charge on the high side. Prior to that I had the tube. com FREE DELIVERY possible on eligible purchases Jul 31, 2013 · According to the EPA, while R134a does not deplete the ozone layer, (as R12 did) it has an extremely high GWP (Global Warming Potential) that is approximately 1,400 times greater than that of CO2. What else This switch was done to use a more environmental friendly refrigerant for EPA guidelines. I was wanting to go back to the factory A6 compressor and upgrade to R134A. Nov 22, 2014 · After that the system will have enough pressure to allow the low pressure switch to operate normally and keep the compressor running. However the pressures are in line with r134a. I was told by one person that the dess Mar 13, 2022 · Also, contrary to the previous post, ONLY change the o-rings that you interact with. I know I have to change the P. Mar 14, 2013 · 4) Per both GM and the EPA, flushing the system is not required when converting to R134a unless the old compressor failed and contaminated the system with debris. Jun 25, 2020 · 4. In most of the retrofit instructions I found online, it says to replace this blow-out disc with the high pressure switch from the old compressor. OTHER PARTS No Apr 19, 2023 · Have been ignoring it for awhile and have been counting on the quarter windows to keep me alive but I think I am finally going to get cracking on getting some AC. Switch Clutch Cycling R134A Metric GM Adjustable $ 14. They used to make a conversion oil that was supposed to allow you to leave the r12 oil in but I havent seen it in awhile. Always replace the dryer and orifice tube, cheap insurance. In order to trace back it’s origins we have to go all the way back to the 1930’s and a partnership between General Motors and the DuPont company. ∙ 16y ago. Fix the floppy vents with some velcro I had a question on parts though - What else should I specifically change? I see a lot of mentions about the lines converting to blue lines so I'm assuming the factory lines aren't great to keep around. see post #7 in link below Oct 21, 2019 · We update the air conditioning system on a 1968 Corvette with a modern compressor and R134a refrigerant, while using original controls and outlets. I am unsure if it came as R12 or R134, from the factory. delorean. But I did have my 86 TA V8 retrofitted with R134a by the local GM dealer sometime around 1990-93?. $19. Part Number: 21048. Jul 22, 2018 · As long as it was flushed out completely, the compressor oil was dumped, the fittings swapped, a new accumulator/dryer installed, R12 O-rings swapped to R134a compatible, and the compressor & system has a full but not overfull charge of Ester oil you should be good to go. flush the system. I added the dye and oil and vacuumed it down for an hour. ) Let’s do some math now and break this down by price per ounce. A, and have to find someone to evac any remaining R12. Jul 4, 2021 · THERE IS NO HIGH PRESSURE SHUTOFF SAFETY! I took this switch which closes at 200 PSI and opens at 430 PSI. It’s still got the original R-12 compressor. Oct 25, 2007 · What year did ford switch to r134a freon??? i know gm did it in 94 what about fomoco??? How well did 134a work in the cv,tc,gmq??? from my experence with my 98 lumina 134a blows a$$ the reason i ask, i might be able to get a 93-95 vic and i live in hot weather hell 100+ in the summer a… Jul 21, 2020 · Four Seasons makes a R134a specific switch for the R12 threaded dryer. Jun 11, 2017 · Now, which cycling switch should be installed instead of the stock 1987 Chevy switch? That is a new one to me. Calculating How Much R134a You Need. So with the ambient temp of 93 degrees today the dash vent temp was 50 degrees before I adjusted the switch and 40 degrees after I adjusted it. 0# in. Many will want to update their system to run R134a as it is an environmentally friendly alternative and is a non-flammable substance. Mar 24, 2011 · Basically, in order to change from R12 to R134A you need to flush the system and replace the oil, change the hoses to the barrier type, and replace the receiver-drier. The cure is to use the newer R134a compressors is sealing washers that are different thickness. Jul 14, 2012 · You don't need to change out the hoses. I can further go into more detai Jun 3, 2022 · You can get a gmt400 low pressure switch for your truck. Then get a better engine fan. Apr 7, 2001 · I know a guy with a 1991 IFS 1 ton, and another guy with a 1991 solid axle 1 ton. There is a way to adapt a late model GM pressure switch which is readily available and has some amount of adjustment. :yikes: The US EPA announced recently that after 2021R134a will no longer be sold here because it doesn't meet GWP (global warning potential). I'm installing a new (4 seasons) compressor, drier, POA cycling valve, and flushing the entire system on my 65 Buick Electra The old R-12 system took 4. That same year, General Motors (GM) began using it in the Cadillac XTS. As to the debate on refrigerants. Although rockauto also shows this switch fitting a 78-93 chevrolet, which makes me think its an r12 switch since r134a wasnt used (at least on chevy pickups) until 1994 models. Sep 2, 2004 · I evacuate the R12 twice, on most cars I replace the acumulator where the desicant bag is located, change the fittings, connect the ACR2000 134 machine and flush the system. Now I have a working high pressure safety switch. (It must have been R12, because I had to put the adapter valves) I put on a serpentine belt system from an '88 ish truck and bought a new R4 compressor for a '92 (because that is what I got the hose assembly off of) and a new drier for an '85. The 5 bladed ones do not move enough air. If they're sealed and not leaking with R12, they're not gonna leak with R134a. To get down to the same 25. The ACR2000 actualy flushes the system and all of the oil with 134 for about 15 minutes, on most car you have to remove the orifice and/or expansion valve when flushing. 1. Sometimes I could tap the old switch with a screwdriver handle and the compressor would briefly turn on. If you have a vehicle from 1994 or newer your air conditioning unit takes R-134a. 95 / 36 ounces = $00. • GE-50078 Electronic Refrigerant Leak Detection for R1234yf (and R134a): – Certified to SAE J2913 for use on R1234yf systems (certified to SAE J2971 for R134a systems). The mandate does not say what they have to use instead but there are very little choices to choose from. Its like a 92 or 92 suburban low pressure switch i think @Bextreme04 recommended it to me i think. Measure the amount of oil that you can drain out, and add the same plus 2 more of PAG oil. I then leak checked it for another hour. 55 per ounce for R-134a. Feb 19, 2009 · The current recommendations from GM and the EPA for retrofitting a Fiero to R134A are 1) properly recover all R12 refrigerant remaining in the system, 2) don't flush the system or worry about removing the old mineral-based refrigerant oil, 3) replace the accumulator and orifice tube, 4) replace or convert the old R12 service fittings to R134A Jun 10, 2019 · About this item [PREMIUM QUALITY] This r12 to r134a conversion made of Aluminum alloy + rubber seal, 100% tested before shipping. Got the condenser/evaporator cleaned out and pressure tested, new expansion valve, 134a dryer, replaced all the seals with green seals, etc. Jul 1, 2018 · Before R-134a there was R-12. Of course charge capacity was a bit different as well. Enter the appropriate R12 charge specification in the formula which will provide the correct R134a refrigerant charge level. A lot of people go with the POA eliminator kit, which changes the system to a cycling type (compressor turns on and off to regulate pressure). The charge was very reasonable. ) The standard conversion when switching over from R12 to R134A is 80% so your 1988 called for 40 Ounces of R12 and once you have converted it over to R 134A you are going to need right at 32 ounces of the R 134a, when filling the system with the compressor running monitor your systems pressure, you need to see 35 to 40 PSI on the low side and Apr 9, 2023 · EVERYTHING re-used gets flushed with A/C solvent and a flush-gun, because the original compressor may have left shrapnel in the system when it died, and if you change to R134a, you'll have to remove every trace of R12 oil since the R12 oil isn't compatible with R134a refrigerant. BTW- the other GM vehicle to be the last to change over to 12 volts, besides the trucks, was the '55 Corvette. Being I have a '78 and the A/C has not worked in a while, would it make sense to do the conversion since I have to fix the Oct 7, 2020 · Buy R12 To R134a Conversion Kit, with Dust Cap, R12 R22 R502 to R134A Fast Quick Conversion Adapter Switch, Adapter Valve 1/4Inch to 8v1 Thread, R134A Quick Coupler Interface and Core Valve: Air Conditioning Line Repair Tools - Amazon. R-1234yf: Four eight ounce cans are for sale right now at $168. Feb 12, 2023 · You may also notice that the R134a refrigerant will not cool as well as R12. Jun 7, 2022 · R134a systems require larger condensers and higher operating pressures than R12 systems because R134a doesn’t have as high of a heat transfer rate as R12 (which has a heavier molecular size than R134a). May 2, 2018 · If it's anything like changing from R12 to R134a, you'd have to change the oil in the compressor along with all of the refrigerant. Wiki User. It cooled fine but it did kill the fuel mileage. When did switch to R134a? Aug 6, 2017 · Replace the lines with barrier hose rated for R134A. Apr 2, 2011 · Yeah, California just switched from 134a to 134ca, which is the same thing, except instead of the puncture top, they are now self sealing tops, which require a special adapter which costs another $6, then you have an additional $10 core charge for each can, so that the state can reclaim the 8-10% most people don't get out of the can As far as the low pressure switch is concerned, it is my understanding that the stock R12 switch is set to cycle at 25 PSI, which is about 25. Connector Jul 10, 2024 · My truck is an '85. R12, R1234yf, R134a, refrigerant, yf. R134a is less efficient in eliminating latent heat than R12. Jun 29, 2009 · One low side . From GM: R 134A Retrofit Procedures Nov 15, 2012 · I have a 67' Chevlle with a complete OEM Four Seasons system. Jul 17, 2011 · my truck is equipped with the r-12 freon retro fittings. 14 FOUR SEASONS 59976 A/C Compressor Fitting for R134a Conversion $ 4. 072 orifice tube to a . I would avoid the tube if possible. 7) New R134a accumulator/dryer. Replace the O-Rings with R134a compatible parts. I went through similar crap with my GM cars in the past trying to make Regardless, when switching from R12 to R134a you need to change the accumulator/dryer anyway because the desiccant used to absorb moisture in an R12 system isn't compatible with R134a. The Mar 31, 2004 · The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board A/C Conversion R12 to R134a Web 67-72chevytrucks. R134a Conversion Kits are identical to the R12 Kit except supplied with a 134a compressor and proper hose fittings for system charging. 79 FOUR SEASONS 26735 A/C System O-Rings, Seals, & Gasket Kits $ 5. Dry System and Dry GM R4 Compressor will be 6oz. The car has been sitting for about 25 years and is finally sorted out to where it is good to drive. Oh, DONT EVER USE SEALER!!!! That is all. I wired it in series with the low pressure cycling switch. Feb 27, 2001 · I did it on my 72; it's very easy. It lasted just fine until I traded it in on a new 98. 067 assembly. Since then, GM has been gradually switching over its entire line of vehicles to R1234yf, and Ford has also begun using it, too. After removing the old switch and putting the new one on (about 5 minutes), the compressor cycled and functioned normally again. 75#. Aug 1, 2012 · Hi all, I want to fix the air conditioning system in my '93. Both systems use pretty much the same hoses and seals. Ford started the conversion in 1994 but not all Fords were using R134a that year. The biggest difference between the two is that R1234yf is mildly flammable and does require special handling. And the reason goes something like this; r134a is actually a more efficient refrigerant, BUT it is designed to operate at a higher pressure than r12 and an r12 compressor simply won't develop high enough pressures to allow the r134a to work efficiently. The pressure switch can be adjusted on most, I turn it up 20 lbs on low side for cutout. Apr 20, 2017 · R134a and R1234yf are similar, however, R1234yf was created as a more environmentally friendly replacement to R134a. 5 lbs. I believe 1993 models used R-134A. mlmw sdcxgr mbjwsbab ztt qjb qkey meuzp lrnlnjx odhaf qmlhd