Check as follows:
- Remove the charge air cooler inlet duct connected between the turbocharger and charge air cooler.
- Visually inspect the charge air cooler outlet duct.
- If excessive engine lube oil is present, go to the next step.
- If no engine lube oil is present, check for worn or damaged valve or cylinder kit, refer to “7.2 Worn or Damaged Valve Guide/Seal or Cylinder Kit” .
- Replace the defective turbocharger. Refer to “4.2 Turbocharger” in the “Air Intake System” chapter of the EPA07 DD15 Workshop Manual (DDC-SVC-MAN-0002).
- Remove defective turbocharger from the engine.
- Tag removed turbocharger for remanufacture.
- Install a replacement turbocharger.
ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.
- Start and run the engine.
- Run the engine at idle with a no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range, 88-96°C (190-210°F).
- Visually inspect exhaust for excessive 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 black or gray, shut down the engine. Check for worn or damaged valve or cylinder kit; refer to “7.2 Worn or Damaged Valve Guide/Seal or Cylinder Kit” .