Checking cylinder head for watertightness
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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.
- 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 .
- Tighten screws in the order (1) to (10).TIGHTENING TORQUE SPECIFICATIONS
Cylinder head to special tool screw tightening torque
25 Nm - 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 - 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).
- 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 - Dry all openings on the cylinder head with compressed air.
- Coat the bearing positions of the camshaft with motor oil.