Water Pump: Service and Repair

WATER PUMP





REMOVAL
1) Remove the radiator.
2) Remove the V-belts.
3) Remove the crank pulley.
4) Remove the timing belt cover.
5) Remove the timing belt.
6) Remove the automatic belt tension adjuster.





7) Remove the camshaft position sensor.
8) Remove the cam sprocket LH.
9) Remove the belt cover LH No. 2.





10) Remove the tensioner bracket.





11) Disconnect the hose from water pump.
12) Remove the water pump.





INSTALLATION
1) Install the water pump onto cylinder block LH.

NOTE:
- Use a new gasket.
- When installing the water pump, tighten the bolts in two stages in alphabetical sequence as shown in figure.

Tightening torque:
First
12 Nm (1.2 kgf-m, 8.9 ft-lb)
Second
12 Nm (1.2 kgf-m, 8.9 ft-lb)





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





4) Install the belt cover No. 2 LH.
Tightening torque:
5 Nm (0.5 kgf-m, 3.7 ft-lb)





5) Install the cam sprocket LH.
6) Install the camshaft position sensor.
7) Install an automatic belt tension adjuster with the tension rod held by a pin.
8) Install the timing belt.
9) Install the timing belt cover.
10) Install the crank pulley.
11) Install the V-belts.
12) Install the radiator.

INSPECTION
1) Check the water pump bearing for smooth rotation.
2) Check the water pump pulley for abnormalities.
3) Make sure the impeller is not deformed or damaged.
4) Inspect the clearance between impeller and pump case.
Clearance between impeller and pump case:
Standard
0.5 - 1.5 mm (0.020 - 0.060 in)





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