MBE 4000 DDEC VI Troubleshooting – Section 7.2 External Oil Leaks

Section 7.2
External Oil Leaks

To determine if oil leaks are causing excessive oil consumption, perform the following:‪

1. Steam clean the engine.

   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.‪

2. Start and run the engine to operating temperature: 88° C (190°F).
3. Check for leaks at oil lines, connections, mating joints, seals, and gaskets.
   1. If no oil leaks are found, shut down the engine and check for a leaking oil cooler core; refer to "7.3 Leaking Oil Cooler Element" .
   2. If oil leaks are found, shut down the engine.
4. Repair or replace components leaking oil; refer to MBE 4000 Service Manual (6SE420), Chapter 3, “Lubrication System”.
5. Verify repairs made to correct oil leaks; refer to "7.2.1 Test Engine with Repairs Made to Correct Oil Leaks" .

Section 7.2.1
Test Engine with Repairs Made to Correct Oil Leaks

Perform the following steps to determine if the repairs resolved the oil leaks:‪

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.‪

1. Start and run the engine to operating temperature: 88° C (190° F).
2. Shut down the engine.
3. Check the engine for oil leaks.
   1. If no oil leaks are observed, check for a leaking oil heat exchanger; refer to "7.3 Leaking Oil Cooler Element" .
   2. If external oil leaks are present, refer to "7.2 External Oil Leaks" and repeat.