3 - Check Engine Oil Level
3. Check Engine Oil Level
Purpose:
To determine if there is enough oil or oil of sufficient quality to operate the injectors.
Recommended Procedure:
Check oil level with oil level dipstick. If there is no oil or very little oil in the crankcase, the injectors will not operate.
If the oil level is overfull, it is possible the engine was incorrectly serviced or fuel is diluting the oil and filling the crankcase. If a substantial amount of fuel is in the oil, it will have a fuel odor.
Inspect oil for color. A milky white oil indicates possible coolant contamination which will have an ethylene glycol odor.
Check service records for correct oil 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 will have increased viscosity (become thicker) and will make engine cranking more difficult and starting less reliable at temperatures below freezing. Refer to the lube oil chart in the operator's manual for the correct oil selection for temperature conditions.
The level in the oil reservoir should also be checked. Remove the inspection plug in top of reservoir and check to see if the oil reservoir is full (a reservoir that drains back after the engine has not been operated for a period of time can cause a hard start or a start and die condition). Filling the reservoir will allow the system to prime faster, facilitating starting.
Possible Causes:
- Oil level low - oil leak, oil consumption, incorrect servicing
- Oil level high - incorrect servicing, fuel dilution from tandem fuel pump, fuel dilution from injector 0-rings
- Oil contamination with coolant - oil cooler, head gasket, porosity
- Low reservoir level - engine built dry (not pressure lubed), prolonged period of not running, leaking check valve in high pressure pump
Tools Required:
1/4-inch drive ratchet or breaker bar to remove inspection plug