Dynamic Timing (Engine Running Timing)

Start and warm engine to normal operating temperature. Coolant temperature MUST be above 192°F (89°C) to perform dynamic timing procedure. Stop engine and install magnetic pick-up probe of dynamic timing meter (78 0100) into timing pointer probe hole. See Fig 1 .

Fig 1: Magnetic Pick-Up Probe Installation
Remove No. 1 cylinder glow plug. Install luminosity probe in place of glow plug and tighten to 12 ft. lbs. (16 N.m). See Fig 2 . Connect photocell over luminosity probe and connect to dynamic timing meter. Connect dynamic timing meter to battery and set to 20° offset.

Fig 2: Luminosity Probe Installation
Raise and support rear wheels. Place transmission in Neutral and start engine. Using throttle control tool (14 0302), set engine speed at 1400 RPM with no accessory load. Observe injection timing on meter. Timing should be 4-6° ATDC. Add 1° for altitudes over 3000 feet.
If timing is not within specifications, stop engine and loosen pump retaining nuts (keeping nuts snug). As viewed from front of engine, rotate top of pump to right to retard timing or to left to advance timing with pump rotating tool. Moving timing mark .030" (.75 mm) is equal to 2° of timing. Retighten nuts.
Recheck timing using meter. If still not to specifications repeat step 4. When timing is correct, tighten retaining nuts to specification. Remove timing meter and other test equipment. Reinstall glow plug using anti-seize compound on threads.