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SERIES 60 WORN OR DAMAGED VALVE OR CYLINDER KIT

A loss of cylinder pressure can cause increased oil consumption. The detection and elimination of cylinder pressure losses is vital to engine life and efficient operation. To assist the mechanic in effectively measuring the loss of cylinder pressure, and locating the source of abnormal leaks in individual cylinders, the following test procedure has been developed. ‪

  1. Move the vehicle requiring test to the chassis dynamometer; refer to OEM guidelines.
  2. Disconnect air compressor, refer to section .
  3. Start the engine.
  4. Run the engine and bring the engine coolant temperature to normal operating range.
  5. Run vehicle to full load and rated speed.
  6. Attach a manometer calibrated to read in inches of water, to the oil dipstick opening. Measure and record the crankcase pressure.
  7. Shut down engine.
  8. Remove the vehicle from the chassis dynamometer.
  9. Review the crankcase pressure test results.
    1. If the crankcase pressure exceeds 0.75 kPa (3 in. H2 O), repair worn or damaged valve(s) or cylinder kit; refer to section .
    2. If the crankcase pressure was less than or equal to 0.75 kPa (3 in. H2 O), perform cylinder compression test.
  10. Compare the cylinder compression test results to specifications.
    1. If the cylinder compression is below specifications, repair worn or damaged valve(s) or cylinder kit; refer to section .
    2. If the cylinder compression is within specification, call Detroit Diesel Technical Service Group.

Worn or Damaged Valve(s) or Cylinder Kit(s) Repair

Perform the following steps to repair worn or damaged valve(s) and cylinder kit(s): ‪

  1. Remove cylinder head; refer to section .
  2. Inspect the cylinder head for worn or damaged valves; refer to section .
  3. Inspect the cylinder kit components for worn or damaged liners; refer to section ; pistons or piston rings, refer to section .
  4. Replace damaged cylinder kit components; refer to section .
  5. Verify repairs made to cylinder head valve(s) or cylinder kit components; refer to section .
Test Engine with Repaired Cylinder Head Valve(s), and Cylinder Kit

Perform the following steps to determine if the cylinder head valve and cylinder kit repair resolved starting difficulty: ‪

  1. Refer to section for exhaust caution before preceeding. Attempt to start and run the engine.
    1. If the engine starts and runs, no further troubleshooting is required.
    2. If the engine fails to start and run, call the Detroit Diesel Technical Service Group.