Section 14.1
Improper Engine Coolant Level
To determine if improper engine coolant level is causing high engine coolant temperature, visually inspect the radiator coolant level; refer to OEM guidelines.
- If the radiator coolant level is within approximately 50 mm (2.0 in.) of the radiator filler neck, check for insufficient radiator air circulation; refer to "14.2 Insufficient Radiator Air Circulation" .
- If the radiator coolant level is not within approximately 50 mm (2.0 in.) of the radiator filler neck, refer to "14.1.1 Improper Coolant Level Resolution" .
Section 14.1.1
Improper Coolant Level Resolution
Perform the following steps to resolve improper coolant level:
- Fill coolant system to correct level, refer to MBE 4000 Service Manual (6SE420), Chapter 4, “Cooling System”.
- Verify coolant level resolution; refer to "14.1.1.1 Test Engine with Proper Coolant Level" .
Section 14.1.1.1
Test Engine with Proper Coolant Level
Perform the following to determine if proper coolant level resolved high engine coolant temperature:
![]() PERSONAL INJURY |
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 82-105°C (180-221°F), no further troubleshooting is required. Shut down the engine.
- If the engine coolant temperature is not 82-105°C (180-221°F), shut down the engine. Check for insufficient radiator air circulation; refer to "14.2 Insufficient Radiator Air Circulation" .
EPA07 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568 |
Generated on 10-13-2008 |