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Discussion Starter · #1 ·
Just started up my 3800 series II SC motor in a 91 Cav swap

The motor devolpes an whistle during after a few min. of running
Pulled the dip stick out and the motor vented though the
dip stick tube.

Mod list
3.4 inch pulley, TB spacer, colder plugs, colder T-stat, Ram air, 3 inch exhaust and DP, DHP ECM

any help
 

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Either your PCV system is blocked or you have a vacuum leak ( broken gasket, missing screws in lower intake manifold, etc. ).
 

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Is your throttle body spacer custom?
Does it seal the PCV inlet with RTV or anything?

Your PCV inlet tract is blocked somewhere, you just need to figure out where, or just get a breather.

Mat
 
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