Blow back
20

Asked by Guru9522Y Jun 09, 2017 at 10:03 PM about the 1987 GMC Suburban R1500

Question type: General

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

7 Answers

F_O_R answered 6 years ago

Make sure the PCV hose is hooked up to the intake and the valve.

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F_O_R answered 6 years ago

Some blow by is normal. On an old engine it could be a lot.

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