Car Problem Reports

Pontiac Bonneville Water Pump May Fail Prematurely

Pontiac Bonneville Problem
30 Reports
Me Too

Model Years Affected: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005

Engines Affected: 3.8L V6, 3.8L V6 Supercharged

Average Mileage: 141,000 mi (97,000 mi - 189,000 mi)


The water pump may develop a coolant leak resulting in an engine overheating condition.


  • Visitor, , 127,000 mi

    over heating waterpump leaking

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  • maniacmechinic, , 3.8L V6 Supercharged, 150,000 mi

    Failing water pump caused an antifreeze leak as well as overheating. It also caused the heater to stop working as well when coolant would get low.

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  • Visitor, , 3.8L V6, 146,000 mi

    Water pump is literally spraying water everywhere. I have never in my life seen a water pump fail like this.

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  • Visitor, , 3.8L V6 Supercharged, 97,000 mi

    I haven't got the problem fixed yet. I will have to take it to the shop because I am not car SAVVY. I noticed my cars temperature needle rising alot so I would add coolant. Over time I seemed to be having to add a half a gallon to a gallon every two to three days. Today I decided to add water to the radiator and to the reservoir but I left the top off of the radiator when I started the car. The coolant flowed smoothly from the reservoir to the radiator. It started to leak around the hose in between the alternator and the belt on the supercharger. I have researched online figured out that I may possibly need to replace my water pump

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  • Visitor, , 3.8L V6

    I was sitting in front of a convenience store with my car running and my car began to smoke. I got out popped the hood of the car to see all my coolant leaking from my car.

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  • Visitor, , 3.8L V6 Supercharged, 101,000 mi

    Coolant leaking, Car overheating. Took it in and water pump went out. approx. $400 to fix.

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  • Profile_thumbnail

    water pump was leaky....replaced and it was okay

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  • Visitor, , 3.8L V6, 140,000 mi

    leaking coolant around water pump. Last GM vehicle I'll ever buy.

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  • Visitor, , 3.8L V6, 140,000 mi

    engine overheating and serpentine belt broke because of water pump failure. 140,000 miles

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