Defective Coolant Hoses
Check as follows:
- Visually examine cooling system hoses; refer to OEM guidelines.
- Check for soft, deteriorated, or collapsed hoses.
- If cooling system hoses are not soft, deteriorated, or collapsed, check the fan belts and tensioner.
- If cooling system hoses are soft, deteriorated, or collapsed, remove and replace damaged or worn coolant hoses as necessary; refer to OEM instructions.
To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.
- Start and run the engine.
- Run the engine through its operating range with no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range, and visually examine replaced hoses for any leaks.
- If the engine coolant temperature is 85-95°C (185-203°F) and no leaks are found, no further troubleshooting is required.
- If the engine coolant temperature is 85-95°C (185-203°F) and leaks are found shut down the engine, repair leaks.
- If the engine coolant temperature is not 85-95°C (185-203°F) and no leaks are found, shut down the engine. Check fan belts and tensioner.
|EPA07 DD15 Troubleshooting Guide - DDC-SVC-MAN-0029|
|Generated on 10-13-2008|