Checking cylinder head for watertightness

Prerequisite

All valves are removed

Release the venting connector (2).
Position special tool 0 496 409 (118 081) on cylinder head.
The rubber layer (marked yellow) on the special tool 0 496 409 (118 081) must point to the cylinder head.
The rigid side of the special tool 0 496 409 (11 8 081) must face downwards.

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To fasten the special tool 0 496 409 (11 8 081) , the washers (1) of the cylinder head bolt must be used.
Fasten the special tool 0 496 409 (11 8 081) (2) with the screws from the set of special tools 0 496 408 (11 8 080) (3).
Observe the following tightening sequence .

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Tighten screws in the order (1) to (10).

TIGHTENING TORQUE SPECIFICATIONS

Cylinder head to special tool
screw	tightening torque 25 Nm

Fig 1: Cylinder Head Screws Tightening Sequence

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Position the valve (1) from the set of special tools 0 496 408 (118 080) on the cylinder head and tighten.

TIGHTENING TORQUE SPECIFICATIONS

Valve in cylinder head
valve	tightening torque 0.8 Nm

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Apply the valve (1) with 3 bars of pressure (2).
Dip the cylinder head into a water bath and check for leakage.
The water bath can be made easier with standard dish soap.

The formation of blisters indicate faults or cracks on the cylinder head .
Relieve the pressure on the valve (1) with a tire pressure gauge (2).
Disassemble the valve (1) from the set of special tools 0496 410 (11 8 082).

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Release the screws of the device (1).
Remove the device (1).
Replace the venting connector (2).
Parts: Venting connector

Tighten the venting connector (2).

TIGHTENING TORQUE SPECIFICATIONS

Venting connector/special tool to cylinder head
M8x1 Replace the venting connector.	tightening torque 15 Nm

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