A full flow filter or a combination oil filter is present on the N14 engine. The upper portion of the combination filter contains the full flow filter element while the lower portion contains the bypass filter element.

Oil circulates through the full flow portion of the filter, into the oil cooler housing, and is directed to the engine oil rifles.

A smaller portion of the oil circulates through the lower bypass portion of the filter and is dumped back to the oil pan sump.

Use Cummins® Premium Blue 15W-40 multi-viscosity oil or its equivalent which meets API Classification CE or CF-4 for turbocharged engines.

Use the oil filter wrench, Part Number 3375049, to remove the filter.

NOTE: The o-ring can stick onto the filter head. Make sure it is removed before installing a new filter.

Clean the oil filter head surface.

Use clean vegetable oil to lubricate the gasket surface of the filter.

CAUTION  Mechanical overtightening can distort the threads or damage the filter element seal.

Fill the filter with clean 15W-40 oil.

Install the filter onto the oil filter head. Tighten the filter until the gasket contacts the filter head surface.

Use oil filter wrench, Part Number 3375049, to tighten the filter an additional three-fourths to one (¾ to 1) turn, or follow the instructions supplied with the filter.

Confirm that the oil level in the pan is to the full mark.

Operate the engine until the water temperature reaches 82°C [180°F]. Check the oil pressure and check for leaks.