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Injection Pump Timing

WARNING: This page is about a different car, the 1983 Volkswagen Vanagon, 1983 Volkswagen Rabbit, 1983 Volkswagen Quantum, 1983 Volkswagen Pickup, and 1983 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
  1. To check injection pump timing, set crankshaft to TDC on No. 1 cylinder and align marks on flywheel and clutch housing. Check marks on injection pump sprocket and mounting plate.
  2. If timing needs adjustment, remove plug from the injection pump cover and install adapter and dial indicator in place of plug. Preload the dial indicator to .097" (2.5 mm).
  3. Turn engine slowly counterclockwise until dial indicator needle stops moving. Zero indicator. Turn engine clockwise until TDC mark on flywheel is lined up with reference mark.
  4. Check dial indicator against specifications listed in table. If out of adjustment, loosen bolts on mounting plate and support. Turn pump to adjust timing and tighten bolts.
INJECTION PUMP TIMING SPECIFICATIONS

Application Range In. (mm)
Quantum (1) .037-.041 (.95-1.05)
Rabbit & Rabbit Pickup
With No Paint Dot (2) .033-.037 (.83-.93)
With Yellow Paint Dot (3) .043-.047 (1.10-1.20)
Vanagon (2) .031-.035 (.78-.88)
(1) Set to .039" (1.00 mm).
(2) Set to .034" (.86 mm).
(3) Set to .045" (1.15 mm).
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