The water pump may fail resulting in engine overheating and possible timing belt damage. Overheating and/or timing belt failure can result in very expensive engine repairs. As a precaution, it is recommended to inspect the timing belt and water pump at regular intervals.
Car Problem Reports
Volkswagen Golf TDI Inspection of Water Pump and Timing Belt
Volkswagen Golf TDI Problem
Engine Affected: 1.9L 4 Cylinder Diesel Turbo
Visitor, 2002 Volkswagen Golf TDI, 1.9L 4 Cylinder Diesel Turbo, 100,000 mi
Water pump failed on 2002 VW Golf TDI, causing timing shear and bent valves. Catastrophic engine failure.