Glow Plug: Service and Repair

Glow Plugs

Special tools, testers and auxiliary items required

• Hinged Socket (3220)

• Socket Insert AF 12 for Glow Plugs (VAS 6454)

Removing

- Turn off the ignition.

- Remove the engine cover. Refer to => [ Engine Cover ] Engine Cover.

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

• On 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 a combustion chamber pressure sensor (only installed in cylinders 2 and 5).
2 Glow plug without a combustion chamber pressure sensor

- Disconnect the glow plug connectors from the glow plugs.

- Clean the glow plug channel in the cylinder head (there must not be any debris in the cylinder).

• Example for cleaning:

• Extract large contaminants with a vacuum cleaner.

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

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

- Use the socket insert AF 12 for glow plugs (VAS 6454) to loosen the glow plugs for cylinders "2 and 5".

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

Installing

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

- Use the hinged socket (3220) or the socket insert AF 12 for glow plugs (VAS 6454) with a suitable torque wrench to tighten the glow plugs.

• Glow plug tightening specification: 17 Nm

- Connect the glow plug connectors to the corresponding glow plugs and make sure the connectors are secure.

Further installation is performed in the reverse order.

• Intake manifold flap motor bolt tightening specification. Refer to => [ Intake Manifold Overview ] Intake Manifold Overview.