Pump Injector Unit Pump Piston, Checking Position and Adjusting

Pump Injector Unit Pump Piston, Checking Position and Adjusting

Special tools, testers and auxiliary items required

• Clamping device (T10199)

• Socket XZN 16 (T10198)

• Camshaft tool (T10195)

• Multi point socket (T10336)

• Dial gauge holder (VW 387)

• Dial gauge set, 4-part (VAS 6341)

Requirement

• Engine removed

Procedure

• The measurement or adjustment with cylinder bank 1 must be done on cylinder 1. With cylinder bank 2, engine must be rotated 360 degrees out of Top Dead Center (TDC) and measurement or adjustment must be done on cylinder 7.

- Remove acoustic cover and cylinder head cover of the applicable cylinder head.

- Remove fuel or tandem pump from respective cylinder head. Refer to --> [ Tandem and Fuel Pump ] Tandem and Fuel Pump.

- Rotate engine with Counter hold tool Touareg V10 (T10172) to TDC. Refer to --> [ Valve Timing Checking ] Testing and Inspection.

- Remove vibration damper. Refer to --> [ Front Sealing Flange and Vibration Damper Assembly Overview ] Service and Repair.

- Install camshaft tool (T10195).

- Position dial gauge from dial gauge set, 4-part (VAS 6341) using dial gauge holder (VW 387) and approximately 1 mm pretension as shown on pump injector unit spring seat.





- Remove camshaft tool (T10195) pin and rotate engine opposite engine rotation direction until dial gauge needle no longer moves.

- Set dial gauge to "0".





- Now turn motor again in direction of rotation to TDC and insert camshaft tool securing pin.

- Read out value on dial gauge.

Specified Values

• Engine code BKW: 5.18 mm ± 0.1 mm

• Engine code BWF: 4.95 mm ± 0.1 mm

If specified value is achieved:

- Reassemble the engine.

If the specification is not obtained:

- Remove outer bearing cap - A -, place clamping device (T10199) on camshaft gear and tighten its bolt to 40 Nm.

- Loosen camshaft gear bolt - B - using socket XZN16 (T10198).





- Rotate camshaft with socket (T10336) until specified value is reached.

- Tighten camshaft bolt to 150 Nm and repeat measurement.

- If specified value is now reached, tighten camshaft gear bolt an additional 90°.

- Reinstall cylinder head cover, refer to --> [ Tightening Sequence of Bolts for Cylinder Head Cover ] Cylinder Head Assembly Overview, as well as acoustic cover.