geordi wrote:
R2.0 - You don't need to heat up the engine OR replace the drier twice to clean out the AC system.
The drier is a canister full of something like silica beads, simply designed to absorb any remaining water after the system is vacuumed. As for the vacuum, by sucking the system down, you are lowering the boiling point of water to less than the air temp. IIRC, a 20 inch vacuum pulls the water boil point down to about 70 degrees F. I generally try for about a 22-23" vacuum on my systems, and I have never had a problem with water contamination. Just hook the pump up, open the valves on your gauges with the thing running... And go have a sandwich. Leave it alone for at least 30 minutes to an hour, and you will be just fine with a fresh drier.
Not according to this chart:

29" of vacuum gets you an 80F boiling point. 20" only gets you down to about 160F. And it's been open for a while, in an atypically wet Mid Atlantic winter and spring. I think I may just replace the drier and see how it goes, and check pressures every so often.
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The o-rings also don't need to be replaced unless they have actually been sitting out in the air.
They were.
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Any that were still in their 'installed' position and closed up are just fine, don't mess with them. The high side pipe on the driver's side of the engine *could* be a problem, especially if the block at the end of the hose is movable in relation to the rest of the hard pipe. That piece is only pressed into position as a seal with the hose - if it moves, the seal is broken.
Don't follow - you mean the block mounted on the compressor?
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Ticking noise? I hope it goes away, keep an eye / ear on that.
I am - it seems to have diminished a bit, but I'm still going to change to the thicker oil