Is this a vacuum leak? [Archive] - SaabCentral Forums

: Is this a vacuum leak?

13th June 2005, 05:46 AM
According to Fred's guide, If the engine speeds up whilst squeezing the pipes you have a leak. When I squeeze the pipe circled in the picture the engine slows. Is this a leak? Also, should air be travelling through the 1 way valve in the direction shown?

13th June 2005, 08:20 AM
Normal as this is the crank vent - air travels from the top of the engine to the intake manifold but not the other way on boost if the 1 way valve is working.