this really SUCKS

[rocksteadyracer]

new bigport rebuild enginehas squeak once it develops vacuum, goes away when oil filler cap opened, I have significant vacuum through dipstick hole ann throughout crankcase, exhaust header EGR is capped once header installed, charcoal canist off and tube plugged, , is the engine suppsed to draw fresh air from aomewhere?

[morgan]

Do you have the line from the exhaust valve cover to the intake manifold? Some pics might help point stuff out

[rocksteadyracer]

dont believe there ever was one on exhaust side, intake side has moroso oil/air seperator between intake plenum and valve cover as a PVC replacement, I'll get some pics up

[morgan]

That's what I meant, intake side.

[rocksteadyracer]

what we did was move the vacuum line from the intake plenum to the intake in front of the throttle body (reducing the amount of vaccum) and it stopped squeaking