11 12 100 Removing and installing/replacing cylinder head (M52TU / M54 / M56): Notes

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Special tools required:

NOTE: For special tools, refer to ENGINE - SPECIAL TOOLS .

00 0 200
00 9 120

Remove both exhaust manifolds, refer to 11 62 140 REMOVING AND INSTALLING BOTH EXHAUST MANIFOLDS WITH CATALYTIC CONVERTERS (M52TU / M54 / M56) .

NOTE: After removing exhaust manifolds:

Reinstall engine support arm with engine mount and remove special tool 00 0 200.

Remove intake filter housing with air-mass flow sensor. See 11 61 050 Removing and installing intake air manifold (M54)

Remove cylinder head cover, refer to 11 12 000 REMOVING AND INSTALLING, SEALING CYLINDER HEAD COVER (M52TU / M54 / M56) .

Remove all spark plugs. See 12 12 011 REPLACING ALL SPARK PLUGS

Remove intake air manifold, refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (M54) .

Remove coolant drain plug in engine block. Drain and dispose of coolant.

Installation:

Replace sealing ring on drain plug.

Tightening torque: 25 N.m.

Vent cooling system and check for leaks, refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (M54 / M56) .

Remove coolant thermostat housing, refer to 11 53 000 REMOVING AND INSTALLING/REPLACING COOLANT THERMOSTAT (M52TU / M54 / M56) .

Remove coolant pipe.

NOTE: If the coolant pipe cannot be fed out:

Release banjo bolt (1) and disconnect oil pressure line for VANOS adjustment unit.

Fig 1: Releasing Banjo Bolt

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Installation:

Replace O-ring on coolant pipe.

If necessary, replace sealing rings on banjo bolt (1).

Tightening torque of banjo bolt (1); 32 N.m.