A/C problems, HELP! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

NichIowa · 08-12-2007, 07:18 PM

Well next weekend I am driving 1200 miles in my 70 C20 and am attempting to rebuild my factory A/C. ATTEMPTING. Well I got a new heater core as mine was gone along long time ago (rusted floor pan) and I also got a new compressor (u pull) clutch works great and runs smooth. I also got a new drier and replaced o-rings. hooked up a vacuum pump and only would pump down to 20 and as soon as I turned it off back to zero. So finally my question is, is there a place that is a trend of going wrong with our trucks A/C. Any help would be appreciated.

**john** · 08-12-2007, 07:28 PM

Sounds like you have a leak you need to find. No trends as far as leaks. Could be anywhere.

NichIowa · 08-12-2007, 07:53 PM

yeah, I am going to take it in tomorrow and see if a pro can do a leak check and tell me what I need to repace.

roughedup72 · 08-13-2007, 11:55 PM

Check the condenser!!!. I thought mine was good untill I hooked the drier lines to it and noticed a little movement on the end. It was broken.

08-12-2007, 07:18 PM	#1
NichIowa Registered User Join Date: May 2007 Location: Iowa Posts: 3	A/C problems, HELP! Well next weekend I am driving 1200 miles in my 70 C20 and am attempting to rebuild my factory A/C. ATTEMPTING. Well I got a new heater core as mine was gone along long time ago (rusted floor pan) and I also got a new compressor (u pull) clutch works great and runs smooth. I also got a new drier and replaced o-rings. hooked up a vacuum pump and only would pump down to 20 and as soon as I turned it off back to zero. So finally my question is, is there a place that is a trend of going wrong with our trucks A/C. Any help would be appreciated. Last edited by NichIowa; 08-12-2007 at 07:46 PM.

08-12-2007, 07:28 PM	#2
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: A/C problems, HELP! Sounds like you have a leak you need to find. No trends as far as leaks. Could be anywhere. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/ Last edited by john; 08-12-2007 at 07:29 PM.

08-12-2007, 07:53 PM	#3
NichIowa Registered User Join Date: May 2007 Location: Iowa Posts: 3	Re: A/C problems, HELP! yeah, I am going to take it in tomorrow and see if a pro can do a leak check and tell me what I need to repace. __________________ NichIowa USAF Expert at fixin stuff that aint broke and brakin stuff I can't fix!

08-13-2007, 11:55 PM	#4
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: A/C problems, HELP! Check the condenser!!!. I thought mine was good untill I hooked the drier lines to it and noticed a little movement on the end. It was broken. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

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