Blow back

20

Asked by 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

70,165

Check the pvc valve,

2 of 2 people found this helpful.
85,955

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

2 of 2 people found this helpful.
20

It's new

85,955

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

1 of 1 people found this helpful.
Best Answer Mark helpful
20

Not having a valve cover baffle be the problem

1 of 1 people found this helpful.
20

The old one had one on it

1 of 1 people found this helpful.
85,955

You need the baffle.

1 of 1 people found this helpful.

Your Answer

Suburban

Looking for a Used Suburban in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:

Shortcuts

GMC Suburban Experts

  • #1
    LouB
    Reputation
    1,420
  • #2
    Larry Thibert
    Reputation
    230
  • #3
    ShadetreeMech
    Reputation
    220
View All

Related Models For Sale

Used Chevrolet Suburban
548 listings starting at $2,871
Used GMC Sierra 1500
248 Great Deals out of 10,505 listings starting at $1,775
Used Ford F-150
659 Great Deals out of 10,076 listings starting at $2,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.