Verifying Water Pump Problem

VERIFYING WATER PUMP PROBLEM



WARNING: Never remove a radiator cap while the engine is hot. Severe personal injury may result.

Inspect for Leakage
1. With the engine "OFF" and cold:
- Check coolant level and refill if necessary.

- Inspect the water pump for leakage. Closely check the following areas:
- Inspection (weep) hole (on bottom of water pump).
- Gasket.

2. Pressurize the cooling system with a pressure tester and again check for leaks. Do not exceed the rated pressure of the radiator cap.

NOTE: If any leaks are found, verify that they are not originating from a component near or above the water pump (i.e. thermostat, loose radiator hoses, engine coolant temperature sensor)

CAUTION: When finished, immediately re-install the radiator cap.

3. If no leaks are found, start and warm the engine until the thermostat opens. Stop the engine and check for fresh leakage around the water pump shaft.

NOTE: Occasionally water pumps will only leak around the shaft seals while the shaft is rotating.