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How to get better idle temps

bob234 on Sat September 04, 2010 2:50 AM User is offline

Year: 1989
Make: Chevrolet
Model: Blazer
Engine Size: 4.3
Refrigerant Type: R12
Ambient Temp: 95

I want to add a condenser fan to my 1989 Blazer. What fans would you recommend, and how would I go about wiring them up. Most cars have them wired to the high pressure switch, but mine doesn't have one. There is a spot on the compressor with the snap ring where I can install one at. Should I go with a single or a dual fan setup. I want the ice cold air, not just good enough like most cars. I fixed the busted shroud that was causing the excessive head pressures but the cooling while idling could still be better. After fixing that and using a white tube instead of the blue it blows 36 degrees moving and 50 idling. I want it to blow in the 30s idling too.

Dougflas on Sat September 04, 2010 5:36 AM User is offline

You're probably going to have to put a smaller pulley on the compressor. Try misting the condenser at idle. That would tell you if the fans will help without investing $$$$.

GM Tech on Sat September 04, 2010 9:42 AM User is offline

Ice cold air and an S-10 Blazer box body are two different things.....those vehicles were warranty complaints off the showroom floor---just not big enough condenser or evaporator---people in the back seat always wanted out- in hot weather.....good luck . IMO you will spend lots of money with very little satisfaction....but go for it if you are a rich man.....

The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

NickD on Sun September 05, 2010 8:25 AM User is offline

Recall test driving a new 96, really blew ice cold air, and that Blazer didn't beat you to death when riding in it. Noted they moved the compressor from the right to the left side of the engine, if that would make a difference. But did convince that R-134a can cool well. Evaporator was still under the hood and on the right side, must have a superior condenser in the 96. Would 96 parts fit in an 89? Tape measure would answer that question.

Weird to how fast time flies by, seems like yesterday test drove that 96, but that was 14 years ago. See some 96's for sale, but view those as an old piece of crap. What does that make me?

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