How to replace a water pump on any 3800 V6 engine. Vehicle for demonstration is a 1989 Buick Lesabre Works for any Buick, GM, Oldsmobile, or Pontiac with the 3.8L 3800 V6. Symptoms of water pump failure from least to most severe: Coolant leak. Engine rattling noise. Serpentine belt falls off while driving.
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