Checking cylinder head for watertightness

Preliminary work

Position special tool 0 496 828 (11 6 221) on cylinder head.

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Slide special tools 0 496 829 (11 6 222) onto the already-used cylinder head bolts (1).
Screw special tool 0 496 829 (11 6 222) through the bore holes of the cylinder head bolts (1) with special tool 0 496 828 (11 6 221) .

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Tighten screws in the order (1) to (14) step-by-step.

TIGHTENING TORQUE SPECIFICATIONS

Special tool to cylinder head
M11x175	Tightening torque	15 Nm

Fig 1: Cylinder Head Screws Tightening Sequence

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Loosen spring band clamp on the coolant hose (1).
Pull off coolant hose (1).

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Remove connection of the coolant hose (1) on the cylinder head.

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Install special tool 0 496 410 (11 8 082) into cylinder head.

Tighten special tool 0 496 410 (11 8 082) .

TIGHTENING TORQUE SPECIFICATIONS

Coolant connection to cylinder head
Connection M7	Tightening torque	0.8 Nm

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Place cylinder head in a water bath and apply pressure.

TECHNICAL DATA SPECIFICATION

Check for cylinder head watertightness
	Testing pressure	max. 3.0 bar

If necessary, heat up cylinder head with hot water and repeat test.

TECHNICAL DATA SPECIFICATION

Check for cylinder head watertightness
	Temperature of the cylinder head	60°C

Install and tighten connection of the coolant hose (1) on the cylinder head.

TIGHTENING TORQUE SPECIFICATIONS

Coolant connection to cylinder head
Connection M7	Tightening torque	0.8 Nm

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Connect coolant hose (1).
Secure the coolant hose with the spring band clamp (1).

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Loosen all screws (1) and remove the special tools 0 496 829 (11 6 222).
Take cylinder head from special tool 0 496 828 (11 6 221).

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