Skip to main content

SERIES 50 LOW COMPRESSION PRESSURE

To determine if low compression pressure is causing rough running or stalling, perform the following: ‪

  1. Perform a cylinder compression test; refer to Section .
  2. Compare cylinder compression test results to specifications.
    1. If cylinder pressure is within specifications (listed in Table , refer to Section ), call Detroit Diesel Technical Service Group.
    2. If cylinder pressure is below specifications (listed in Table , refer to Section ), refer to Section .

Low Compression Repair

Perform the following steps for low compression repair: ‪

  1. Perform low compression repair; refer to Section .
  2. Verify cylinder head valve and cylinder kit repair; 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. Start and run the engine.
  2. Run the engine through its operating range with no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range, 88-96C (190-210F).
    1. If the engine is not running rough or stalling, no further troubleshooting is required. Shut the engine down.
    2. If the engine is running rough or stalling, shut the engine down. Call Detroit Diesel Technical Service Group.