Cummins N14 STC, Celect, Celect Plus – Service Manual 002-021   Cylinder Head Gasket

NOTE: If the cylinder head gasket(s) is being replaced because of coolant, lubricating oil, or compression leaks, use the following procedure:

Define the type of leak as follows:

• Compression. Refer to Procedure 008-019 in Section 8.
• Coolant leak from block upper deck/counterbore area. Refer to Procedure 001-058 in Section 1.
• Lubricating oil (refer to the following).

Remove the cylinder head(s).

Refer to Procedure 002-004 in Section 2.

Clean and inspect the cylinder head and the cylinder block.

Refer to Procedure 002-004 in Section 2.

Inspect the cylinder head(s) for surface damage, flatness, and dowel hole depth.

Inspect the cylinder block for surface damage and flatness.

Repair the damaged surface. Refer to the Alternative Repair Manual, Bulletin Number 3379035.

Check the cylinder liner protrusion.

Refer to Procedure 001-028 in Section 1..

Inspect the gasket grommets for defects.

Install the new cylinder head gasket(s).

Install the cylinder head(s).

Refer to Procedure 002-004 in Section 2.

Fill the cooling system.

Refer to Procedure 008-018 in Section 8.

Fill the engine with clean 15W-40 lubricating oil if the cylinder liners were removed. Refer to Procedure 007-025 in Section 7.

Operate the engine until the coolant temperature is above 82°C [180°F], and check for leaks.