3116 and 3126 Truck Engines Unit Injector – Install

Installation Procedure
Use Tooling (B) to clean the sleeve of the unit injector.

Illustration 1 g01233010

Install new O-ring seal (3) on unit injector (2) .

Lubricate O-ring seal (3) with clean engine oil.

Position unit injector (2) in the cylinder head.

Use Tooling (C) to properly seat unit injector (2) . Refer to the Tool Operating Manual, NEHS0738, “Using the 173-1530 Injector Seating Tool on 3114, 3116, and 3126 MUI or 3116 3126 HEUI 2-Valve Engines” for the proper procedure.

Illustration 2 g00644454

Install a new weather pack connector on harness assembly (1) . Connect harness assembly (1) to the unit injector.

End By: Install the rocker arms and the pushrods. Refer to Disassembly and Assembly, “Rocker Shaft and Pushrod – Install”.

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