Thread: 1980 300SD Shut-Off Valve Advice, Please.
View Single Post
  #6  
Old 01-06-2011, 05:40 PM
toomany MBZ's Avatar
toomany MBZ toomany MBZ is offline
Registered User
  
Join Date: Nov 2006
Location: central Va
Posts: 7,820
One of the two nipples should give you ~15 inHg, so check the other nipple with that one plugged off.

There may be a check valve in the main vac line.
__________________
83 SD

84 CD
Reply With Quote