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1984 S10 Blazer A/C is R12. I want to change this.

I want to change my A/C to R134a. Do I need to do anything or replace any of the original equipment in my 1984 S10 Blazer?

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They have a kit it has all you need to change over usually at any auto parts store and yes you will have to change the seals and a few minor things

Posted on Jun 25, 2009

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91 Mercedes 300 E has R12 ac system that is no longer blowing cold. A faint bit of cool air sometimes shows up but it can hardly be called cool. Is there any additive out there compatible with R12?


Propane does the same as R12. I don't recommend it though(highly volatile). Best to convert to 134R. Last time I converted an R12 system was about 10 years ago. I would tell you how to do it, but I could get in trouble because you have to vent out the R12 first. I don't even know of a shop that has an R12 unit anymore. Good for you, they still have the adapters to go over your ports and the 134R today is compatible with the old systems oil. No need to change the compressor, dryer, and expansion valve.

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This car originally contained R12, if you can find it you can use it. The other option if this has not already happened is you can convert the system from R12 to R134a, which is readily available, all auto part stores carry these kits. R12 AC fitting are threaded and R134a systems have slip on quick connect fittings.

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What type of refrig. does the AC use in a 92 dodge caravan


Unless the labels are missing from the car, it will state which type of refrigerant is used. Could be either R12 or R134a. If originally R12, it could have been replaced by R134a with an upgrade kit. The easiest way to tell if the labels are missing, is to look at the valves on the AC system. If they are Schrader valves (same as used on tires), then it is the older R12. If the caps are Red (high pressure side) and blue (low pressure side), then it is R134a. The sale of R12 to non-certified mechanics is illegal in all states as far as I am aware. R134a is available in most states and retro-fit kits are available in most states.

I have done the retro-fit on 2 vehicles with acceptable results. It is recommended to remove all the old R12 with a vacuum pump. Autozone (in my area anyway) rents these.

Good luck if you need and decide to retro-fit yourself.

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R12 system the smaller (diameter) port is the low pressure side, same as R134a.

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I need a diagram on the fuse book on a 1984 S10 Blazer


go to manualspace.com/manual/1984-chev-blazer-s10-fusepanel diagram

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What do I need to replace to convert my ac to r134a on a 88 chevy s-10 blazer


need to have the a/c system evacuated and flushed out with the appropriate cleaner.Replace the orifice tube and drier, and purchase a retrofit kit at any parts house. Recharge system with appropriate amount of oil charge and freon. It will take less R134a than it did R12.

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A/C ford explorer 1993


Whe you retrofitted the system to r134a ,did you subtract the amount from r12 to r134a. The system will hold less r134a than r12. It is roughly four oz less than r12.

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1 Answer

I want to change my A/C to R134a. Do I need to do


r-134a will not work in you a/c,pressures are different!You Will Contaminate and ruin if you try!

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1 Answer

1984 s10 2.8 manual trans. flywheel causes engine to vibrate


no should be same engine. check your engine mounts and tranny mount. how bad a vibration? sometimes after installing engine the trans gets shifted around and if mount was worn it will allow it to hit crossmeber and vibrate.

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