Quote:
Originally Posted by TallyMatt
I need help with doing a full AC replacement on my own in my 2000 Chevy S10 with 4.3L V6 engine. Compressor failed and sent metal throughout the system. Orificie was completely blocked and looked like diamond jewelry!
I am replacing: compressor, accumulator, orifice, condenser, high-side valve and evap. Flushing & re-using the hose assemblely and high-side metal line from condensor to evap. This should be a 100% clean and new system. Since everything is new, I have NO oil in the system at all (except what's factory pre-filled in the new comp.)
I know to vacuum system for 30min to 1hr before charging, perform a vacuum-hold check for 1 additional hr, check for leaks, basic use of manifold gauges, and that I should replace & pre-oil O-rings with the green rings.....
I need to know: how much compressor oil to add -- volume in Oz, what type & viscosity, how to distrubute it throughout the system. I've read to put half in compressor and half in the accumulator... I assume that I should use PAG100.... but I'm not sure and manual is no help and neither are the compressor install instructions.
I also need: clear instructions on how to add the oil to the compressor -- specifically, where to pour it in.... I assume thru the two holes that the AC hoses bolt into..... I know once oil is added to spin the compressor 10-15 times before first use.
Compressor comes pre-filled with oil and very clearly in big BOLD letters says NOT to dump it out, yet everything I read says TO dump it out and pour back in after confirming correct amt. There aren't any clear instructions that I can find. What should I do?
And I'm sure this last question is going to make a few of you Pros chuckle.... does vacuuming the system remore the compressor oil from the system along with the unwanted air? I assume NO, but I'd rather ask a dumb question that F-up a brand new compressor!
Many thanks in advance for your thoughtful help! I'm hoping to have all parts and start Wed. afternoon!
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these GM compressors use pag 150 about 8oz...if drained...
It is best to put too much oil...a few oz over will only reduce the effeciency of the cooling...too little and the refrigerent will leak out quickly...
where did you get the 100 number ???
when you put a vacuum pump on the system this is to remove air ...air is water. water mixed with this pag oil will create acid and as you saw the compressor and other componets get damaged..if the vacuum holds this means no leaks and no air/water in the system...it takes a while for oil to be cleaned of air DO NOT SHAKE OIL,,MAKE AIR BUBBLES..
REMOVAL OF THE TIRE VALVE TO INJECT THE OIL...ON THE SUCTION LOW SIDE..
normally oil does not get sucked out by the vac. pump...
I suspect you/someone put too much refrigerent in the system ,,,this is bad,,, very bad because if the compressor pumps liquid,, you will have metal pieces ....as the compressor is designed to pump only gases...