With a the compressor siezed, I thought I would use vaccuum to test for evaporator leakage. I removed the expansion valve, connected my trusty vaccuum pump and got 10 inches of vacuum, which it gradually lost in about 2 hours. The pump and tubing that I used held 10 inches all night (wish I could do that!).

I realize that the system works on pressure not vaccuum. Is this a valid test for leakage????

Removal of the expansion valve revealed copper fittings, so I am assuming that the evaporator has been replaced. From the posts, I assumed that a copper evaporator would be bullet-proof. Comments???

Thanks.

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Chuck Taylor
Falls Church VA
'86 300E 5 speed
'95 C220 (wife's car)
'98 Porsche Boxster
Past: '79 280E, '82 300D (18 yrs), '77 240D,
4 250C's