Automotive Air Conditioning Information Forum (Archives)

MoleQLR Dano on Mon July 21, 2014 12:26 PM

Year: 1993
Make: Chevy
Model: K1500 BLazer
Engine Size: 5.7L
Refrigerant Type: R12
Country of Origin: United States

Hey Everyone,

I just wanted to get some guidance on re-building the AC system in an older truck of mine. I have a 1993 Chevrolet K1500 Blazer with the 5.7L (small block Chevy 350) that I'm slowly going back over and refurbishing. It's already in good shape but the AC died a few years ago and I want to re-build it. It has the original compressor, condensor, and evaporator. I believe. I got it in 2004 and it had a sticker under the hood that said it had been converted/retrofitted for R134A. What's my best plan of attack here? Should I go with original R12 based parts and do another retrofit for R134A, or is there away for me to figure out what new R134A components will work with that Chevy small block? Can I just use some mid 1990's Chevy components off of a truck with a similar sized engine provided the mounting brackets will line up half way decently? I live in south central Florida and that generation of Blazer, second I think, does not have the rear window that rolls down into the tailgate. So as hot as it gets here I would prefer to have a system with as much extra cooling capacity as I can realistically get with R134A.

Thanks!

Dano

Dougflas on Mon July 21, 2014 1:43 PM

I would see if the condenser of a 1994 will fit your application. The biggest problem on conversions is the condensers and getting airflow across the condenser. Also back in that era there was a service bulletin on the earlier control heads if memory serves me correctly. I think it had to do with cutting a wire going to the control head.