Injection Pump Timing

NOTE: Before starting timing procedure, check valve timing and drive belt tension. On Volkswagen engines, be sure cold start lever is against stop (toward drive gear on pump).

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.
If timing adjustment is necessary, remove plug from injection pump cover and install adapter and dial indicator in place of plug. On Audi models only, loosen cold start device cable by loosening screw No. 1 and turning clamp 90°. See Fig 1.

Fig 1: Loosening Cold Start Device Screw No. 1
Courtesy of AUDI OF AMERICA, LLC

CAUTION: Do not loosen screw No. 2 or pump recalibration will be necessary.
Preload dial indicator (2066) to 0.097" (2.5 mm). See Fig 2. Slowly turn engine counterclockwise until dial indicator needle stops moving. Zero indicator.

Fig 2: Preloading Injection Pump With Dial Indicator
Courtesy of AUDI OF AMERICA, LLC

Turn engine clockwise until TDC mark on flywheel lines up with reference mark. Check dial indicator reading against specifications.

INJECTION PUMP TIMING SPECIFICATIONS

Application

Dial Indicator Reading

Audi

.036" (.93 mm)

Volkswagen

Vanagon

.034" (.86 mm)

Quantum

.036" (.93 mm)

Rabbit & Rabbit Pickup

⁽¹⁾.045" (1.15 mm)

⁽¹⁾	Only for models with yellow paint mark on pump advance cover. Models without paint mark are.034" (.86 mm).

If necessary, loosen bolts on mounting plate and support. Turn pump to adjust timing and tighten bolts. Recheck dial indicator readings. On Audi vehicles, turn clamp on cold start device back 90° to original position and tighten screw No. 1.