Water Pump: Service and Repair

Water Pump

Removal
1. Remove the radiator.
2. Remove the V-belts.
3. Remove the timing belt.
4. Remove the automatic belt tension adjuster.





5. Remove the belt idler No. 2.





6. Remove the cam sprocket (LH) by using ST.
^ ST 32005019 CAM SPROCKET WRENCH





7. Remove the belt cover No. 2 (LH).





8. Remove the tensioner bracket.





9. Disconnect the hose from water pump.
10. Remove the water pump.





Installation
1. Install the water pump onto cylinder block (LH).

NOTE:
^ Replace the gasket with a new one.
^ When installing the water pump, tighten the bolts in two stages in alphabetical sequence as shown in the figure.

Tightening torque:
^ First: 12 Nm (1.2 kgf-m, 8.7 ft. lbs.)
^ Second: 14 Nm (1.4 kgf-m, 10.2 ft. lbs.)





2. Connect the hose to water pump.
3. Install the tensioner bracket.
^ Tightening torque: 24.5 Nm (2.5 kgf-m, 18.1 ft. lbs.)





4. Install the belt cover No. 2 (LH).
^ Tightening torque: 5 Nm (0.5 kgf-m, 3.6 ft. lbs.)





5. Install the cam sprockets (LH) by using ST.
^ ST 32005019 CAM SPROCKET WRENCH
^ Tightening torque: 78 Nm (8.0 kgf-m, 57.9 ft. lbs.)





6. Install the belt idler No. 2.
^ Tightening torque: 39 Nm (4.0 kgf-m, 28.9 ft. lbs.)





7. nstall the automatic belt tension adjuster whose tension rod is held with pin.
8. Install the timing belt.
9. Install the V-belts.
10. Install the radiator.

Inspection
1. Check the water pump bearing for smooth rotation.
2. Check the water pump pulley for abnormalities.
3. Using a dial gauge, measure the impeller runout in thrust direction while rotating the pulley.
^ "Thrust" runout limit: 0.5 mm (0.020 inch)





4. Check the clearance between impeller and pump case.
^ Clearance between impeller and pump case:
^ Standard 0.5 - 0.7 mm (0.020 - 0.028 inch)





5. After water pump installation, check the pulley shaft for engine coolant leaks. If leaks are noted, replace the water pump assembly.