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SERIES 50 LEAKING OIL COOLER CORE

To determine if a leaking oil cooler core 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; refer to step .
    2. If no oil is present in either the engine coolant or radiator, check for a defective air compressor; refer to Section .
  2. Remove the oil cooler core and housing; refer to Section .
  3. Clean both the oil side and water side of oil cooler core; refer to Section .
  4. Perform an oil cooler core pressure test; refer to Section .
  5. Visually check to see if air bubbles are rising to the surface of the water within the container.
    1. If air bubbles are present; refer to Section .
    2. If no air bubbles are present, complete lube oil consumption report; refer to Section .

Oil Cooler Core Replacement

Perform the following for oil cooler core replacement: ‪

  1. Replace and install a new oil cooler core; refer to Section .
  2. Verify replacement of oil cooler core; refer to Section .
Test Engine with New Oil Cooler Core

Perform the following steps to determine if the replaced oil cooler core reduced oil consumption: ‪

  1. Start and run the engine to operating temperature 88C (190F).
  2. Shut down the engine.
  3. Check the engine coolant for the presence of oil.
    1. If no oil is present in the coolant, shut down the engine, no further troubleshooting is required.
    2. If oil is present in the coolant; refer to Section .
Test Engine for Reduced Oil Consumption

Perform a lube oil consumption report; refer to Section . ‪

  1. Review the oil consumption report.
    1. If the oil consumption report data is within specifications, check for defective air compressor. Refer to Section .
    2. If the oil consumption report data is not within specifications, call Detroit Diesel Technical Service Group.