Glow Plug: Service and Repair

Glow Plugs

Special tools, testers and auxiliary items required

• Hinged Socket (3220) (for glow plugs "1, 3, 4 and 6")

• Socket Insert AF 12 for Glow Plugs 4-cyl.TDI CR (VAS 6454) (for glow plugs " cylinders 2 and 5")

Removing

- Turn off the ignition.

- Remove engine cover. Refer to => [ Engine Cover ] Service and Repair.

• For cylinders 3 and 6, the intake manifold flap motor must be removed.

• In cylinders 2 and 5, a combustion chamber pressure sensor is integrated in the glow plug.

• Electrical component list term: glow plug 2 (Q11) with cylinder 2 combustion chamber pressure sensor (G678).

• Electrical component list term: glow plug 5 (Q14) with cylinder 5 combustion chamber pressure sensor (G681).

Glow Plug Versions





1 Glow plug with combustion chamber pressure sensor (only installed in cylinders 2 and 5).
2 Glow plug without combustion chamber pressure sensor.

- Disconnect glow plug connectors from glow plugs.

- Clean the glow plug duct in the cylinder head. Contaminants must not enter the cylinder.

• Example for cleaning:

• Extract large contaminants with a vacuum cleaner.

• Spray a brake cleaner or a suitable cleaner into the glow plug shaft, let it work and then use compressed air to remove it.

• Then clean the glow plug duct with a cloth dampened with oil.

- Use the (3220) to loosen the glow plugs "1, 3, 4 and 6".

- To loosen glow plugs "2 and 5" use the (VAS 6454).

- Then carefully remove the glow plug by hand or with a hose without bending it.

Installing

- Carefully install the glow plugs by hand or with a hose without bending it.

- Tighten the glow plugs with (3220) or (VAS 6454) to the tightening specification.

• Glow plug tightening specification: 17 Nm

- Connect the glow plug connector and make sure it is secure.

Further installation is performed in reverse order.

• Intake manifold flap motor tightening torque - assembly overview, refer to => [ Intake Manifold Overview ] Intake Manifold Overview.