N14 Base Engine Troubleshooting and Repair 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).

• Coolant leak from block upper deck/counterbore area (Refer to Procedure

  001-058-014).

• Lubricating oil (refer to the following).

Remove the cylinder head(s). Refer to Procedure

002-004-002.

Clean and inspect the cylinder head and the cylinder block. Refer to Procedures

002-004-006 and

002-004-007, respectively.

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 No.

3379035.

Check the cylinder liner protrusion. Refer to Procedure

001-028-026.

Inspect the gasket grommets for defects.

Install the new cylinder head gasket(s).

Install the cylinder head(s). Refer to Procedure

002-004-026.

Fill the cooling system. Refer to Procedure

008-018-028.

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

007-025-028.

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