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Home >> Chevrolet >> 1982 >> Luv 2.2L Eng VIN S, 4WD >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Diesel Fuel Injection >> Adjustments >> Injection Pump Timing >> I-Mark

Injection Pump Timing: I-Mark

  1. Check that notch in pump flange is in line with notched line on front plate. Turn engine to position No. 1 cylinder at TDC. Remove injection pump pulley cover (upper front cover) and see that timing marks are aligned. See Figure.
  2. Remove cam cover and rear plug. Check that fixing plate fits smoothly into slit at rear end of the camshaft, then remove fixing plate. See Figure. Disconnect injection pipe from pump (using back-up wrench) and remove distributor head screw.
  3. Install timing gauge tool (GM Part No. J-29763) and set lift approximately 0.04" (1 mm) from the plunger. Turn engine until No. 1 cylinder is 45-60° BTDC, then calibrate dial indicator to zero.
    NOTE: The crankshaft pulley is provided with a total of 11 notched lines (4 lines in one area and 7 lines in another). The group of 4 is for static timing and should be used for service purposes. The group of 7 is for dynamic timing and used only at the factory.
  4. Turn crankshaft in normal direction of rotation until timing mark (12° BTDC) on crankshaft pulley is in line with indicator. See Figure. Dial indicator should show 0.020" (0.5 mm). If not, loosen pump bolts and rotate pump slightly to obtain proper reading.
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