MBE 4000 DDEC VI Troubleshooting – Section 7.3 Leaking Oil Cooler Element

Section 7.3
Leaking Oil Cooler Element

To determine if a leaking oil cooler element is causing excessive oil consumption, perform the following:‪

1. Check for oil in the engine coolant or radiator.
   1. If oil is present in either the engine coolant or radiator; go to step 2 .
   2. If no oil is present in either the engine coolant or radiator, check for a defective air compressor; refer to "7.4 Defective Air Compressor" .
2. Remove the oil cooler element and housing. Refer to the MBE 4000 Service Manual (6SE420), Chapter 3, “Lubrication System”.
3. Clean both the oil side and water side of the oil cooler element.
4. Inspect and pressure test the element for cracks. Refer to the MBE 4000 Service Manual (6SE420), Chapter 3, “Lubrication System – Oil Cooler/Filter Housing”.
   1. If cracks are present, replace oil cooler element, refer to MBE 4000 Service Manual (6SE420), Chapter 3, “Lubrication System”. Verify the replacement of the oil cooler element, refer to "7.3.1 Test Engine with New Oil Cooler Element" .
   2. If no cracks are present, complete a lube oil consumption report; call Detroit Diesel Customer Support Center (313-592-5800) for a form.

Section 7.3.1
Test Engine with New Oil Cooler Element

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Perform the following steps to determine if the replaced oil heat exchanger reduced the oil consumption:‪

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 coolant for the presence of oil.
   1. If no oil is present in the coolant, perform a lube oil consumption test report; refer to "7.3.2 Test Engine for Reduced Oil Consumption" .
   2. If oil is present in the coolant, check for a defective turbocharger. Refer to "7.5 Defective Turbocharger" .

Section 7.3.2
Test Engine for Reduced Oil Consumption

Perform a lube oil consumption report; call the Detroit Diesel Customer Support Center at 313-592-5800 for a form.‪

Review the oil consumption report.‪

1. If the oil consumption report data is within specifications, check for defective air compressor; refer to "7.4 Defective Air Compressor" .
2. If the oil consumption report data is not within specifications, call Detroit Diesel Customer Support Center at 313-592-5800.