3.0L - Ignition/glow Plug System - Engine Code(s): Cata: Other Audi Q7 4L facelift

Camshaft Position Sensor -G40

Removing

Scheme 20

Remove the engine cover. Refer to ENGINE COVER .

Disconnect the connector -3-.

Remove the bolt -1-, and remove the Camshaft Position (CMP) sensor -G40- -2-.

Installing

1. Tightening specification , refer to «GLOW PLUG, CAMSHAFT POSITION SENSOR, ENGINE SPEED SENSOR OVERVIEW»(ref-491753-S36149471262012073100000) .

Install in reverse order, paying attention to the following

Note. Replace the O-ring.

Engine Speed Sensor -G28

Removing

Scheme 21

Loosen the fasteners and remove the rear noise insulation -2-.

Disconnect the connector -2-.

Scheme 22

Remove the bolt -1- and the Engine Speed (RPM) sensor -G28-.

Installing

Install in reverse order, paying attention to the following

1. Tightening specification , refer to «GLOW PLUG, CAMSHAFT POSITION SENSOR, ENGINE SPEED SENSOR OVERVIEW»(ref-491753-S36149471262012073100000) .

Install the noise insulation. Refer to Removal and Installation .

GLOW PLUGS

Special tools and workshop equipment required

1. Hinged Socket 3220 (for glow plugs "1, 3, 4 and 6")
2. 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 .

Note. 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-.

Scheme 23

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.

Note. 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.

1. Glow plug tightening specification: 17 Nm

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

Further installation is performed in reverse order.

1. Intake manifold flap motor tightening torque - assembly overview, refer to «INTAKE MANIFOLD OVERVIEW»(ref-491734-S05176664952012073100000) .