I have 1987 GMC Sierra classic 1500
suburban I just had the valve cover gaskets
and intake gaskets replaced I have put it
back together now oil is coming out the
breather hole do the vacuum line have
something to do with that what's the issue
Check the pvc valve,
Make sure the PCV hose is hooked up to the intake and the valve.
Some blow by is normal. On an old engine it could be a lot.
Not having a valve cover baffle be the problem
The old one had one on it
You need the baffle.
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