Checking cylinder head for watertightness
Precondition
All valves are removed
- Release venting connector (2).
- Position special tool 0 496 409 (11 8 081) on cylinder head.
- The rubber layer (marked yellow) on the special tool 0 496 409 (11 8 081) must point to the cylinder head.
- The fixed side of the special tool 0 496 409 (11 8 081)
must point downwards.
- For attaching the special tool 0 496 409 (11 8 081) , it is mandatory to use the cylinder head bolt washers (1).
- 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 the screws in the sequence (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 (11 8 080) on the cylinder head and tighten
.TIGHTENING TORQUE SPECIFICATIONS
Valve in cylinder head valve tightening torque 0.8 Nm - Apply 3 bar of pressure (2) to the valve (1).
- Immerse the cylinder head in 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 0 496 410 (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 SPECIFICATIONSVenting 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.