Water Pump - Cleaning and Inspection for Reuse (8-01) Section 8 - Cooling System - Group 08 M11 Page 8-8 Water Pump - Cleaning and Inspection for Reuse (8-01) Cleaning Remove the o-ring and clean surface (1). Use Scotch-Brite T 7448, Part No. 3823258, to clean sur- face (2). Visually inspect the water pump weep hole for indication of leakage. NOTE: A streak or chemical buildup at the weep hole is not justification for water pump replacement. If a steady flow of coolant or oil is observed, replace or rebuild the water pump. Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam will cause serious personal injury.
Use solvent or steam to clean the water pump exterior. Dry with compressed air. Inspection Visually inspect the water pump body for cracks or damage. Turn the water pump shaft by hand to inspect the bearings and impeller for freedom of rotation. If damaged parts are found or the shaft does not rotate freely in the water pump body, the water pump must be rebuilt or replaced. Refer to Water Pump - Rebuild (8-02).