11 53 000 Removing and installing/replacing coolant thermostat (S54)

WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. 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) .

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

Installation:

Replace sealing ring on drain plug.

Tightening torque 11 11 5AZ. Refer to 11 11 ENGINE BLOCK .

Vent cooling system and check for leaks. Refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING .

Remove intake filter housing with air-mass flow sensor.

Remove water hoses.

Fig 1: Removing Water Hoses

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Open cable clamp (1).

Release screws on thermostat housing. Remove thermostat housing and thermostat.

Fig 2: Removing Thermostat Housing & Thermostat

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Installation:

Keep sealing faces clean and free of oil.

Replace O-ring (1) on water pump and O-rings on connecting tube (2).

Fig 3: Replacing O-Rings

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Coat O-rings on connecting tube (2) with water acting as antiseize agent.

CAUTION: O-rings on connecting tube (2) can very easily be shorn off.

Installation:

Preassemble thermostat (1) as shown in illustration on water pump.

Fig 4: Assembling Thermostat On Water Pump

Courtesy of BMW OF NORTH AMERICA, INC.