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Off topic AC question? V70-XC70 1998

posted by  Rule 308 on  Wed May 21 10:53 CST 2008
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last visit: Tue May 8 09:20 CST 2012
[RELATED]

Yes, they sure as heck do and it is an eye opening experience when they blow. It is a valve on the back of the compressor, some of them are a simple blow off valve that will vent the entire charge and some of them are more of a poppet valve that will pop open and bleed enough gas out that pressures come back down.

R-134 tends to react to heat more than the old R12 stuff did so when an electric fan would take a dump the temps and pressures would spike ratherly quickly and it would blow the charge. When this happens and you happen to be under the hood, son of a gun does it grab your attention right now!

I missed your post on the overcharge, sounds like a funny one though.

Mark






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