PeachParts Mercedes-Benz Forum - View Single Post - 84 300SD Main Vacuum Line Superceded

Fuzzball · #5 12-22-2006, 06:12 PM

Quote:

Originally Posted by toomany MBZ

On my '83 SD the clear vac line is nearest the white check valve, {doubt it matters} goes to a "Y" connection, to the white thing on top of the IP, to a black line, I'm thinking auto trans, the other to cruise control. Can't figure how to send photos. You may be able to put a vac line off those two seperated leads on that hose. Mine, has like yours, the two just before the check valve. How did you determine the culprit is that line? Good luck, hope this helps.

Thanks for the suggestions......

I used my Mityvac off the Y tube (with the opposite side of the Y plugged with a golf tee) with the car running and the vacuum would bounce around from zero to 15 and back to zero....figure that has to be a problem....

When I checked the vacuum off the tube itself, it was fine...and I could pump up the vacuum into the brakes after a LOT of work....that single check valve was the only place I had a problem.