WATER PUMP COOLANT LEAK CHECK


Even when the water pump is normal, a residue of the coolant draining may be found on the drain hole, the vapour hole and the installation surface of the water pump. If a residue of the coolant draining is found, check the water pump leakage by following method.
1.Wipe off the residue of the coolant draining on the water pump.
2.
warning Make sure that the coolant is cold when removing the radiator cap.
Remove the radiator cap.
3.
caution Do not pressurise 100 kPa or more.
Install the radiator cap tester, and pressurise with 100 kPa.
4.Hold the pressurised state for 20 minutes, and check that the water leakage from the drain hole, the vapour hole or the installation surface of the water pump.
5.Remove the radiator cap tester, and install the radiator cap.
6.Warm up the engine, let it idle for 20 minutes and stop it.
7.After the engine is stopped, check the water leakage from the drain hole, the vapour hole or the installation surface of the water pump.
8.If the water leakage is confirmed in the items 4 and 7, replace the water pump. (Refer to <4B1, 4J1>, <4N1>) .