Model: astro van
Engine Size: 4.3l
Refrigerant Type: r134a
hi all, o.k. I assembled the following parts. orifice tube, compressor, accumulator, liquid line. pulled a vacuum for 3 hours. both low and hi side will not hold vacuum. I got a leak. how do I proceed?
Do you have a sniffer? (electronic leak detector) If not, put a small charge or R134a in it and use liquid leak search on all fittings. Sometimes, the guages are the problem so disconnect them and put the caps on the service ports. To check the compressor seal, I use a plastic bag fitted around the compressor and let it sit for a few hours. Then I poke a hole in the bag and put my leak detector in the hole.
yes, I have a sniffer. I will do as you say. the system loses vacuum very rapidly, will I be able to put a partial charge in?
you mentioned the fittings, just how tight approx. should the fittings be. too tight is bad for o rings, too loose a leak is created. how tight past hand tight?
well, thanks to all who answered. I did use nylog blue on all o rings.
When it's a big leak you want to start with literally little puffs of 134a into the system. It is easy to have traces of 134a clouding the air in the garage making the leak detector go crazy all the time.
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