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Originally Posted by tgingrich
Well, the valve seals from the old pump were three times as thick as the new ones, allowing the vacuum to leak over the new valves. Old seals in and everything works fine. It was two days from the time I took the pump apart and cleaned everything until I had the new parts for reassembly. Next time instead of burning up my sunday, I will compare ALL of the new parts to the old FIRST. Lesson learned. At least now I know my vaccum system is fine except for the door locks.
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I am incredibly relieved to read this. I've been having horrible vacuum problems of my own since I rebuilt my vac pump. I even ordered a new main vac line because the check valve in the old one wasn't sealing fully. (But it did sound amusingly like an oboe playing G upon blowing into one end.)
I've now traced the problem definitively back to the pump itself, but had no idea what it could be. Now I think I know. Having decided that the new valves were a little thicker than the old, I didn't think twice about using the new, thinner o-rings. The irony of the situation is that I lost one of the new o-rings and reused an old one, later opening up the pump again to install the new ring when I found it a day later.
Anyway, thanks for answering my question before I had a chance to ask it!
Tom