To determine if a defective turbocharger is causing excessive blue exhaust smoke, perform the following:
- Remove the charge air cooler inlet duct connected between the turbocharger and charge air cooler.
- Visually inspect the compressor inlet side of the turbocharger.
- If excessive engine lube oil is present, replace the turbocharger, refer to MBE 900 Service Manual (6SE9007), air intake system chapter.
- Verify replacing the turbocharger corrected the excessive blue smoke concern;refer to "10.3.1 Test Engine with Replaced Turbocharger" .
Test Engine with Replaced Turbocharger
Perform the following steps to determine if a replaced turbocharger has resolved the excessive blue exhaust smoke condition:
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.
- Start and run the engine.
- Run the engine at idle speed with a no-load condition for approximately five minutes, allowing the engine coolant to reach normal operating range, approximately 70-95°C (158-203°F).
- Visually inspect the exhaust for excessive blue smoke.
- If the engine exhaust smoke emission appears normal, no further troubleshooting is required. Shut down the engine.
- If the engine exhaust smoke is excessively blue, shut down the engine. Check for worn or damaged valves or cylinder kit; refer to "10.4 Worn or Damaged Intake/Exhaust Valve or Cylinder Kit" .
|EPA07 MBE 900 DDEC VI Troubleshooting Guide - 6SE580|
|Generated on 10-13-2008|