Lubricating Oil Diluted With Fuel or Engine Coolant
To determine if lubricating oil diluted with fuel or engine coolant is causing low oil pressure, perform the following steps:
- Acquire a lubricating oil sample from the engine oil pan.
- Visually examine lubricating oil sample for presence of engine coolant or fuel.
- If coolant or fuel are not present, check for a faulty oil pressure gauge; refer to "15.4 Faulty Oil Pressure Gauge Sensor" .
- If coolant or fuel are present, refer to "15.3.1 Contaminated Lubricating Oil Resolution" .
Contaminated Lubricating Oil Resolution
Perform the following steps to resolve contaminated lubricating oil:
- If coolant is present, consider head gasket replacement and repair as required.
- If fuel is present, consider fuel nozzle replacement and repair as required.
- Drain engine oil pan.
- Refill engine crankcase with new oil.
- Verify lubricating oil replacement; refer to "188.8.131.52 Test Replaced Lubricating Oil" .
Test Replaced Lubricating Oil
To determine if replaced lubricating oil resolved low oil pressure, perform the following:
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 at rated speed, if the oil pressure is 241 kPa (35 psi) or more, no further troubleshooting is required.
- If the oil pressure at rated speed is less than 241 kPa (35 psi), shut down the engine. Check for faulty oil pressure gauge sensor; refer to "15.4 Faulty Oil Pressure Gauge Sensor" .
|EPA07 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568|
|Generated on 10-13-2008|