Water Pump: Service and Repair

Water Pump Replacement (6.6L (LB7) Engine)

Removal Procedure





1. Remove the left fender wheelhouse inner panel.
2. Drain the engine coolant and the engine block.
3. Remove the thermostat housing crossover.
4. Remove the fan clutch.
5. Remove the crankshaft balancer.
6. Remove the oil cooler inlet pipe to water pump nuts.
7. Remove the engine wiring harness retainer from the inner stud.





8. Remove the water pump bolts. Note the location of the bolts. The bolts are three different lengths.
9. Remove the water pump.
10. Remove the water pump outlet pipe gasket.
11. If required, clean and inspect the water pump.

Installation Procedure





1. Lubricate the water pump O-ring with engine oil.
2. Install the water pump.

3. Notice: Refer to Fastener Notice in Service Precautions.

Install the water pump bolts. Ensure the correct length bolt is used in the proper location.
Tighten the bolts to 21 Nm (15 ft. lbs.).





4. Install the water pump to oil cooler inlet pipe gasket.
5. Install the engine wiring harness retainer on the water pump outlet pipe inner stud.
6. Install the water pump to oil cooler inlet pipe nuts.
Tighten the nuts to 21 Nm (15 ft. lbs.).
7. Install the thermostat housing crossover.
8. Install the crankshaft balancer.
9. Install the fan clutch.
10. Fill the engine with coolant.
11. Install the left fender wheelhouse inner panel.