HOW TO REPLACE MY AC SYSTEM IN MY C1500 5.7.
1991 Chevrolet Silverado • 113,000 miles
I need to replace the AC system in my 1991 Chevrolet c1500 5.7. Its an R-12 system and the compressor is leaking. I was told by the shop that the "relay or resistor" that was supposed to protect the compressor didn't do its job and fried the compressor. I think I can do this job myself but would like to know what I am going to need and the steps involved beforehand. Any help would be greatly appreciated.
January 14, 2012.
January 14, 2012.
Well I think it still has some freon left in it since if I disconnect the battery to reset the A/C light, it will work and blow cool for a while, but after a little while the light starts to blink which disengages the compressor again. When the compressor is working, it engages for a few seconds then disengages over and over again while its running. Does that mean its low? Should it be engaged constantly?
Dude, spend 10-20 bucks, give this a shot. Go buy a bottle of R134A or whatever from Walmart, look for something with a bottle and a gauge on it, they're disposable. You might need the valve kit, like I said are cheap. Follow the instructions, I bet you will have AC for a year, and maybe forever. Get the stuff with leak seal in it. I'll walk you through it over the phone if you really need it. I keep this stuff in my car all the time, and amaze people all the time as I fix thier AC in 10 minutes for $20 of freon. The fact that you have cold and then not and then have it and then not tells me you have something that is worth attempting to fix the cheap way.
I absolutely plan on it, I am going to call around tomorrow to some junkyards and get one. Just wanted to know how the compressor should act when running correctly on this vehicle. I have had it a year and when the AC is on you can constantly here the compressor turning on and off. And I thank you for all your help so far, You might have saved me some crazy cash. I am going to post up a donation once i figure out how to do it.
I actually have a can of R134A with a gauge in my garage. Will I only need one? So where do I get the adapter?
You are saying I should try this without replacing the compressor and without draining out any remaining R-12 correct? Just top off with R-134a. If so, I will do this weekend and let you know how it turns out.
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