Detroit Diesel — (Static) Timing Check - Injection Pump Static Timing
Adjustments
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Shut-off must be in the no-fuel position before proceeding.
Procedure
- Disconnect battery cables.
- Remove injection pump gear drive access cover from front of engine and discard O-ring.
- Rotate the engine in the normal operating direction until #1 piston is on the compression stroke with the damper pulley mark aligned with the correct timing mark.
- Thread plunger pin (J41162) into timing hole. If plunger pin enters the timing hole, injection timing is ok.
- If not, remove the plunger pin tool from gear and loosen the four capscrews which secure the gear to the injection pump.
- Rotate injection pump with socket wrench to align the small hole in the drive gear hub with the lock plate hole behind the pump drive hub.
- Torque the four capscrews using the correct torque specification, then re-thread the plunger pin; if it enters, timing is correctly set.
- Remove the plunger timing pin.
- Re-install gear cover using a new O-ring seal.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.