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.Google+
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.