2. Check Engine Oil Level
2. Check Engine Oil Level
WARNING: SMOKING OR OPEN FLAME OF ANY TYPE MUST NOT BE PRESENT WHEN WORKING NEAR FUEL OR FUEL VAPOR. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.
Purpose:
The purpose of this test is to verify the oil quality and determine if there is sufficient oil to operate the injectors.
Check Engine Oil Level
^ Check for contaminants (fuel coolant).
^ Correct grade and viscosity.
^ Miles or hours on oil correct level.
Recommended Procedure:
Check for the correct oil level using the dipstick with the vehicle on level ground. If there is no oil or very little oil in the crankcase the injectors will not operate.
If the oil level on the dipstick is overfull it is possible the engine was incorrectly repaired or fuel or coolant is diluting the oil and filling the crankcase. Recheck the engine oil level. Remove and clean the oil level indicator. Reinsert the oil level indicator into the oil level indicator tube until only the oil level indicator handle touches the top of the oil level indicator tube.
Inspect the oil for color. A milky white oil indicates possible coolant contamination and will have an ethylene glycol odor.
Oil contaminated with diesel fuel has a diesel fuel odor and increases the engine oil level. If the engine oil level is above Max due to diesel fuel dilution the oil appears thin and watery.
If the oil level is overfilled drain the oil and the fuel filter housing. Isolate either cylinder head by removing the corresponding fuel line from the fuel filter housing. Remove the fuel pressure test port plug from the secondary filter housing. Install the plug in the outlet port. Install the Adapter High Pressure Pump Test 303-765 or equivalent and Gauge 0- 1100 KPa (0-160 psi) Bar (part of DSL ENG Pressure Test Kit 014-00761 or equivalent) at the test port to confirm constant fuel pressure.
Using the scan tool access output state control (0SC) and command the fuel pump ON. Watch for fuel to drain out of the oil pan drain hole. Depending on the severity of the leak it may take some time before a leak is noticeable. Remove the valve cover at the suspect cylinder head and inspect the injector area for leaks.
Check the maintenance records for appropriate oil change intervals type and viscosity for the vehicle operating temperature. Single weight or 15W-40 oil is not recommended for cold ambient temperatures. 10W-30 oil is recommended for cold ambient temperatures. Oil that has had extended drain intervals has increased viscosity (become thicker) and makes engine cranking more difficult and starting less reliable at temperatures below freezing. Extended oil change intervals can also cause a runs rough concern. Refer to the lube oil chart in the Workshop Manual or Owner's Literature for the correct oil selection for temperature conditions.
Possible Causes:
^ Loss of lube oil pressure
^ Oil level low oil leak oil consumption incorrect repair
^ Oil level high incorrect repair fuel dilution from injector 0-rings
^ Oil contamination with coolant oil cooler head gasket porosity front cover gasket
Tools Required:
Adapter High Pressure Pump Test 303-765 or equivalent
Gauge 0-1100 kPa (0-160 psi) Bar (part of DSL ENG Pressure Test Kit 014-00761 or equivalent)
Scan tool