To determine if low compression is causing starting difficulty, perform the following steps:
- Perform a cylinder compression test; refer to "29.2 Cylinder Compression Test" .
- Compare cylinder compression test results to specifications.
- If cylinder pressure is below specifications; refer to "17.13.1 Low Compression Repair" .
- If cylinder pressure is within specifications, call Detroit Diesel Technical Service Group.
Low Compression Repair
Perform the following steps for low compression repair:
- Remove cylinder head; refer to "1.2.2 Removal and Cleaning of Cylinder Head" .
- Inspect the cylinder head for worn or damaged valves; refer to "1.2.3 Inspection of Cylinder Head" .
- Replace damaged valves; refer to "1.4.2 Removal and Cleaning of Valve Spring (Cylinder Head Installed)" .
- Inspect for worn or damaged cylinder kit components:
- Inspect cylinder liner for damage, refer to "1.20.1 Repair or Replacement of Cylinder Liner" .
- Inspect piston and piston rings for damage, refer to "1.18.1 Repair or Replacement of Piston and Connecting Rod" .
- Verify repairs made to cylinder head valve(s) or cylinder kit components; refer to "126.96.36.199 Test Engine with Repaired Cylinder Head Valve(s), and Cylinder Kit" .
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:
- Attempt to start and run the engine.
- If the engine starts and runs, no further troubleshooting is required. Shut the engine down.
- If the engine fails to start and run, call the Detroit Diesel Technical Service Group.
|Series 50 Service Manual - 6SE50|
|Generated on 10-13-2008|