Quote:
Originally Posted by john_6_2
I have a 1995 Impalla SS with 42k & yesterday the AC stoped working... I turned it on & it was just blowing hot air I killed it after like 5 seconds & pulled over to check the compressor & it not engaging. I know the sell R-134 recharge/stop leak kits but do the really work? Or is there another way for me to check the compressor with out having to replace it first ?
Thanks in advance for any & all help
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The sealerproducts are to be avoided,,,what must be determined is do you have a leak that needs repair or is this simply a compressor seal leaking because of a low oil condition...
GM for some reason for many decades does not put sufficient oil in the a/c system....this causes the seal to leak...
check all fittings for oil stains/residue..
if its wet at compressor only then you have the common seal leak..
when my 1996 was new the a/c needed a 12oz adding of r134...then the next year it was down again but now needed 20oz....
so in 1998 I added pag 150 to the system 4oz of oil 8oz of r134,,,then topped it off with r134....
now it is 2009 and since then I have added 12 oz over the last 10years....
my 2000 silverado the same thing occured...
my 1983 same problem after 17yrs still ran great ,,,actually r12 beats r134 for cooling but to be fair the 83 had 40oz of refrigerent..
on adding of the refrigerent do not over charge us a guage...
with the air temp of 80-85 deg F you should have 40-45 psi on the charge low side fitting at an idle of 1500rpm..doors open fan/blower on max.
the high side pressures are variable depends on many factors ...
I have usually seen 280psi range....this is higher than the R12 which is usually in the 175psi area..
I would say if you do measure the high pressure 325 psi is the absolute max ...