See Figures 1 and 2
Engine coolant temperature must be above 176° F (80° C) before injection timing can be checked or adjusted.
- Park the vehicle on a level surface. Firmly apply parking brake and block the wheels to prevent accidental movement.
- Place transmission in NEUTRAL. Make sure no accessories are on, and that the A/C and heater are in OFF position.
- Locate and remove injection pump distributor head plug bolt and sealing washer. This can be accessed from the left side of the pump assembly.
- With the bolt and washer removed, install the Static Timing Gauge Adaptor with Metric Dial Indicator or equivalent. Make sure that indicator plunger is in contact with injection pump plunger.
- Remove the timing mark cover from transmission housing. If the cover is dirty, clean with a wire brush before removing. Align timing mark with pointer on rear engine cover plate.
- Rotate crankshaft pulley slowly counterclockwise until dial indicator pointer stops moving. This is approximately 30°-50° BTDC.
- Adjust dial indicator to zero.
Make sure that dial indicator pointer does not move from zero. Slowly rotate crankshaft left and right to make sure.
Turn the crankshaft clockwise until the timing marks align with indicator pin. At this point, the dial indicator should read 0.0392-0.0408 in. (0.98-1.02mm). If the reading is not within this specification, adjust the timing as follows;
- Loosen injection pump attaching bolt and nut.
- Rotate the injection pump toward the engine to advance the timing, and away from the engine to retard the timing. Rotate the pump until the dial indicator reads 0.0392-0.408 in. (0.98-1.02mm).
- When the desired specification has been reached, tighten the injection pump attaching bolt and nut to 13-20 ft. lbs. (18-27 Nm).
- Remove the dial indicator and adaptor. Install the injection pump distributor head plug, then tighten to 10-14.5 ft. lbs. (13.5-19.5 Nm).
- Connect the negative battery cable. Start the vehicle and check for fuel leaks, or a weak idle. Adjust if necessary.