Remove the rocker arms and the pushrods. Refer to Disassembly and Assembly, “Rocker Shaft and Pushrod – Remove”.
Illustration 1 g00644454
Disconnect harness assembly (1) from the unit injector.
Illustration 2 g00644457
Remove unit injector (2) by hand, when possible. If necessary, use Tooling (A) to loosen unit injector (2) .
Remove unit injector (2) from the cylinder head.
Illustration 3 g01233010
Remove O-ring seal (3) from unit injector (2) .