11 53 000 Removing and installing/replacing coolant thermostat (M52TU / M54 / M56)

WARNING: This page is about a different car, the 2002 BMW Z3 and 2001 BMW Z3. However, it is still accessible from the selected car via links, so may be relevant.

Remove fan clutch with fan impeller and fan cowl. Refer to 11 52 020 REMOVING AND INSTALLING/REPLACING FAN CLUTCH (S52 / S54 / M52 / M52TU / M54 / M56) .

Drain and dispose of coolant.

NOTE:

The water drain plug is located on the exhaust side on cylinder 2 in the engine block.

Installation:

Replacing sealing ring on water drain plug.

Tightening torque, refer to 11 11 5AZ in 11 11 ENGINE BLOCK .

Fig 1: Disconnecting Water Hoses By Pulling Locks

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Pull locks and disconnect water hoses.

Installation:

Refer to 17 00 ...INSTRUCTIONS FOR WORKING ON COOLING SYSTEM for general instructions for working on cooling systems.

Loosen nut (1).

Fig 2: Loosening Nut

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Release screws on thermostat housing, remove thermostat housing.

Installation:

Keep sealing faces clean and free of oil.

Fig 3: Identifying Sealing Faces

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NOTE:

Coolant thermostat is integrated in coolant thermostat housing and can only be replaced as a single unit.

Installation:

Replace seal (1).

Fig 4: Replacing Seal

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