M11 Series – Service Manual – 007-037   Lubricating Oil System

Clean and check the oil drain plug threads and the seal surface.

Install the oil drain plug in the lubricating oil pan.

NOTE: Check the torque of the side and bottom drain plug to be sure both are tight.

Fill the engine with clean 15W-40 oil. Choose the correct oil for your operating climate as outlined in Section V, in the Operation and Maintenance Manual, ISM Series Engines, Automotive/Transit Buses, Bulletin 3666319.

Fill the engine with clean oil to the H (high) mark on the dipstick. Total system capacity including filter is approximately 39 liters [10.3 gal].

The oil pan capacity is 34 liters [9 gal].

NOTE: Check Centinel™ makeup tank oil level, if equipped.

CAUTION  Engine oil pressure must be indicated on the gauge within 15 seconds after starting. If oil pressure is not registered within 15 seconds, shut off the engine immediately to avoid engine damage. Confirm the correct oil level in the oil pan.

Operate the engine at idle speed to inspect for leaks at the filter(s)
and the drain plug.

Shut off the engine. Wait approximately 10 minutes for the oil to drain back from the upper parts of the engine to the oil pan.

Check the oil level again. Add oil as necessary to bring the level up to the H (high) mark on the dipstick.

CAUTION  The lubricating oil system must be primed before operating the engine after a rebuild or extended shutdown to avoid internal component damage. If an external pressure pump is used, do not prime the system after the filter. The filter will be damaged.

Remove the plug at the “filter-in” fitting of the lubricating oil filter head. This will allow oil to flow in the correct direction through the filter.

Install an oil supply line connected to a source of clean 15W-40 lubricating oil in the Compuchek® fitting drilling of the filter head.

Prime the lubricating system until the oil pressure gauge indicates a positive pressure.

NOTE: The oil pressure must not exceed the maximum of 276 kPa
[40 psi].

Remove the oil supply and install the Compuchek® fitting.