WATER PUMP REPAIR - CONTINUED
TEST AND INSPECTION
Turn water pump over, gear side down. Clamp drive gear (8) in soft-jawed vise with water pump impeller (12) facing
Install water pump impeller tester (28) in tapped holes provided in impeller (12). Tighten bolts to 156-204 lb-in (18-
Apply 50 lb-ft (68 Nm) torque in either direction with torque wrench inserted in impeller tester (28). If impeller slippage
is detected, remove and discard impeller (12). Install new impeller and retest. Remove impeller tester after testing.
Turn water pump over, impeller side down.
Attach dial indicator (29) to water pump housing (4). Measure gear face runout just inside of drive gear (8) teeth. Rotate
drive gear and measure runout in four places at 90 degree intervals. Maximum allowable runout is 0.0025 in (0.0635
If limit is exceeded, remove drive gear (8) and check for burrs or foreign particles. Install drive gear and recheck runout.
If runout still exceeds limits, replace drive gear and/or water pump shaft (5) as necessary.