Well, you've proved your vacuum shutoff valve is good at least. I'll bet those Y's, F's and T's were already leaky to begin with. Replacing them is pretty easy with the right parts.

You can order them from peachparts here. They got pretty much all the little parts, gadgets and gizmos that you'll need and they're real quick about getting it to ya. I ordered a whole slew of of little things that added up to more than $100 and saved the shipping.

I'll be working on my vacuum system over the next few days as well. If you don't get the vacuum stuff hooked up right, you'll have trouble with automatic shutoff, auto tranny shifting, door locks, and vacuum elements for climate control not to mention your brake booster.

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Codifex
1981 240D ChinaBlue (Got her running with a donor engine.)
1983 300DTurbo w/sunroof.
1984 300TD manual sunroof. (Electrical Gremlins)