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

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Special tools required:

00 0 200
00 9 120

Remove both exhaust manifolds. See 18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM (M54)

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.

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

Remove intake air manifold. See 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. Refer to ENGINE - TIGHTENING TORQUES - 3-SERIES (E46) .

Vent cooling system and check for leaks.

Remove coolant thermostat housing. See ENGINE THERMOSTAT

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.

Installation:

Replace O-ring on coolant pipe.

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

Tightening banjo bolt (1).

Fig 1: Releasing Banjo Bolt & Disconnecting Oil Pressure Line

G03123183

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