Faulty Pressure Control Cap
To determine if a faulty pressure control cap is causing high engine coolant temperature, perform coolant pressure control cap tests.
- If the cooling system pressure is less than or equal to 62 kPa (9 psi), check the coolant hoses; refer to "14.4 Defective Coolant Hoses" .
- If the cooling system pressure is greater than 62 kPa (9 psi), refer to "14.3.1 Pressure Control Cap Resolution" .
Pressure Control Cap Resolution
Perform the following steps to resolve faulty pressure control cap:
- Remove and replace pressure control cap; refer to OEM guidelines.
- Install a new pressure control cap; refer to OEM guidelines.
- Verify pressure control cap repair; refer to "22.214.171.124 Test Engine with Replaced Pressure Control Cap" .
Test Engine with Replaced Pressure Control Cap
Perform the following to determine if exterior radiator repair resolved high engine coolant temperature:
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.
- Start and run the engine.
- Run the engine through its operating range with no-load for approximately five minutes, allowing the engine coolant to reach normal operating range.
- If the engine coolant temperature is normal, no further troubleshooting is required. Shut down the engine.
- If the engine coolant temperature is not normal, shut down the engine. Check coolant hoses; refer to "14.4 Defective Coolant Hoses" .
|EPA07 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568|
|Generated on 10-13-2008|