Leaking Coolant, Intake Manifold Gasket Failure


really awful
Typical Repair Cost:
Average Mileage:
75,882 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. replace intake manifold gasket or replace engine (2 reports)
1995 Pontiac Bonneville cooling system problems

cooling system problem

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1995 Pontiac Bonneville Owner Comments

problem #2

Nov 111998

Bonneville SSE 3.8L

  • Automatic transmission
  • 71,765 miles


I have had 1995 and i now own a 1998 and apparently these are the cars that had the same motor so there for the same problem for one thing the intake manifold is plastic never ever saw that before. But they say the problem is the cooling fluid the used and apparently it was not as good as they thought

If you own one of these cars pay good attention to any cooling fluid that has to be added if so and you see no external leaks assume it is the intake and check it out as soon as possible can save you a lot of money.

- , Cincinnati, OH, USA

problem #1

Oct 042006

(reported on)

Bonneville SE

  • 80,000 miles

I was driving along one day and my car overheated. I took the cap of the radiator there was no antifreeze so I filled it and went a mile and stopped again it leaked out and I couldn't find the leak , I took the spark plugs out and found they were flooded, that's when I found the leak, antifreeze had leaked into my engine . I had it towed and fixed for $900 since I was 800 miles from home I hit the highway. As I rolled into my home town off the highway I lost my oil pressure and the engine at a cost of $3000 Canadian , so look on top of your engine if you see oil or antifreeze in and along the sides of the intake manifold CHANGE THE GASKETS there leaking OR lose your engine, if it leaks, antifreeze will destroy your crank shaft bearings like what happened to me 800 miles from home.

- , Thunder Bay, Ontario, Canada

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