1996 Pontiac Bonneville Coolant in Engine

Tiny
WINGSNJAGS
  • MEMBER
  • 1996 PONTIAC BONNEVILLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 109,000 MILES
I have replaced all the upper half engine gaskets and the engine continues to take on coolant. We completed a compression test and everything is acceptable.
Sunday, November 15th, 2009 AT 2:59 PM

1 Reply

Tiny
KNOWYOURAUTO
  • MECHANIC
  • 113 POSTS
This could be related to upper intake manifold composite material that may degrade around the EGR stove pipe and could result in an internal or external coolant leak.

Inspect the inner diameter of the EGR passage for signs of material degradation. Degradation will appear as "pitting" of the composite material in the EGR port passage.


https://www.2carpros.com/forum/automotive_pictures/435113_Intake381996_1.jpg



IF degradation of upper intake manifold composite material is found, REPLACE the upper AND lower intake manifolds as per GM bulletin#01-06-01-007B. Most vehicles only require replacement of the upper intake manifold AND gasket but check closely.

Good luck,
Was this
answer
helpful?
Yes
No
Wednesday, November 18th, 2009 AT 2:32 AM

Please login or register to post a reply.

Sponsored links