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

WARNING: This page is about a different car, the 2003 BMW 530i, 2002 BMW 530i, and 2001 BMW 530i. However, it is still accessible from the selected car via links, so may be relevant.

Remove fan clutch with fan impeller, 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 ENGINE MECHANICAL - TIGHTENING TORQUES - 530I (E39) .

Vent cooling system and check for leaks, refer to 17 00 039 BLEEDING COOLING SYSTEM AND CHECKING FOR WATER LEAKS .

Pull locks and disconnect water hoses.

Fig 1: Disconnecting Water Hoses

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Installation:

Refer to 17 00... INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .

Loosen nut (1).

Release screws on thermostat housing, remove thermostat housing. See 11 53 000 Removing and installing/replacing coolant thermostat (M52TU/M54/M56)

Fig 2: Releasing Screws On Thermostat Housing

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Installation:

Keep sealing faces clean and free of oil.

Fig 3: Cleaning 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 Thermostat Housing Seal

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