1)coolant loss from plastic upper intake. 2)egr pipe burn through failure, upper and lower gasket failure. 3)replace upper plastic intake, upper and lower gaskets, coolant elbow oil and filter change. (5 hrs labor).
1996 Pontiac Bonneville: engine overheating
6 of the 150 complaints about the 1996 Pontiac Bonneville describe engine overheating.
- owner complaints
- 6
- of this car's complaints
- 4%
- recalls
- 0
Is there a fix? 8 service bulletins cover this area of the car. See below
Engine overheating by model year
What owners say
An independent dealer replaced the manifold gasket and upper plenum on 01/16/04, 03/15/04 the gasket and egr valve was replaced, and the plenum gasket was replaced on 02/27/03. Coolant leaked from the intake manifold. *ak *sc
While driving at 35 MPH vehicle overheated. Vehicle was taken to an independent repair shop, and mechanic determined that intake manifold cracked, spilling fluid into the engine. *ak
Replaced plenum on 1996 pontiac bonneville three times. Last time was approximately at 87,000 miles. Faulty (plastic) part allowed antifreeze and oil to mix in the engine causing stalling (in the middle of a busy state road intersection, a safety hazard). The mixing of the fluids allows the engine to burn the antifreeze and by the time you realize anything you are overheated. This was the third time I had the same problem.
The engine experienced a coolant leak. *ak
Consumer states that due to the design of the upper intake manifold, it is constantly coming into contact with the heat of the engine causing the seal to warp, and cause a coolant leak, consumer replaced water pump, upper intake manifold, and the heater hose fitting at engine block.
Service bulletins that may apply
- Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
- Engine coolant consumption or coolant leak (inspect for material degradation/replace intake manifolds) tt...
- New upper intake manifold and gasket kits
- New rear main seal and special tool for installation
- Some owners may comment on a repeat engine oil pan leak
- Experiencing excessive engine coolant consumption, or an engine coolant leak near or under the throttle...
- Comments of an engine oil leak that appears to originate toward the driver's side of the vehicle; rear of...
Related recalls
No recalls on record for this model year.
Questions about the 1996 Pontiac Bonneville overheating
Is engine overheating a common problem on the 1996 Pontiac Bonneville?
6 of 150 owner complaints about the 1996 Pontiac Bonneville (4%) mention engine overheating. The model year with the most reports is 1998.
Is there a recall or service bulletin for this on the 1996 Pontiac Bonneville?
There are 0 recalls and 8 service bulletins for the same area of the car. Check them below with your VIN.
Other symptoms on the 1996 Pontiac Bonneville
Check engine light 9Airbag light 8Fire or smoke 5Transmission failure 5
VIN decoder
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