Cummins N14 – Cylinder Head – Replacing the Valve Seat Inserts – Disassembly

Use slide hammer assembly, Part No. 3376617, and valve seat extractor, Part No. ST-1279-1, to remove the valve
seat inserts from the cylinder head.

Cummins N14 - Assembly
Apply cup plug sealant, Part No. 3375068, to the outside diameter of the expansion plugs.…
Cummins N14 - Cylinder Head - Replacing the Valve Guides - Cleaning
Use a flexible brush and solvent to clean the valve guide bores in the cylinder…
Cummins N14 - Cylinder Head - Replacing the Valve Guides - Disassembly
Use a valve guide driver, Part No. 3376398, (1) and an arbor press to remove…
Cummins N14 - Cylinder Head - Replacing the Valve Guides - Inspection
Measure the inside diameter of the valve guide bore in the cylinder head. NOTE: If…
Cummins N14 - Cylinder Head - Replacing the Valve Guides - Assembly
Measure the outside diameter of the new valve guides. NOTE: Oversize valve guides have identification…

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