Water Pump: Service and Repair

Coolant Pump

Material:

Removal and Installation
1. Drain the cooling system.
2. Remove the air cleaner assembly.
3. Disconnect the thermostat housing-to-bypass tube hose and position aside.
^ To install, tighten to 5 Nm (44 inch lbs.).
4. Remove the 2 thermostat housing bolts and position aside the thermostat housing.
^ Discard the O-ring seal.
^ To install, tighten to 10 Nm (89 inch lbs.).
5. Disconnect the coolant pump hose and position aside.

6. CAUTION: The center coolant pump uses a sealing washer and must be replaced whenever the bolt is removed.

Remove the 4 coolant pump bolts and the coolant pump.
^ To install, tighten in the following sequence:
- Tighten the coolant pump center bolt to 4 Nm (35 inch lbs.).
- Loosely install the 3 coolant pump outer bolts.
- Tighten the coolant pump center bolt to 25 Nm (18 ft. lbs.).
- Tighten the 3 coolant pump outer bolts to 10 Nm (89 inch lbs.).
7. To install, reverse the removal procedure.
^ Install a new sealing washer on the center coolant pump bolt.
^ Install a new O-ring seal on the thermostat housing and lubricate with clean engine coolant.
8. Fill and bleed the cooling system.