11 53 000 Removing and installing/replacing coolant thermostat (S65)

WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove intake air MANIFOLD .
Drain COOLANT .

Release unlocking element (1).

Detach vent line (2).

Fig 1: Identifying Vent Line And Unlocking Element

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Disconnect FUEL LINE from fuel rail.

Release screws (2).

Unlock wiring harness of fuel injectors (1).

Fig 2: Identifying Fuel Injectors And Screws

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Clip injection pipe (1) out of holder (2).

Lay injection pipe, cylinders 5 to 8, to one side.

Fig 3: Identifying Injection Pipe And Holder

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Disconnect plug connection (1) on coolant temperature sensor.

Disconnect plug connection (2) on solenoid valve.

Fig 4: Identifying Plug Connections

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Unlock coolant hoses and detach.

Release screws (1).

Installation:

Replace sealing rings.

Fig 5: Identifying Screws

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Remove thermostat housing with thermostat forwards in direction of arrow.

Clean sealing surfaces.

Fig 6: Removing Thermostat Housing

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Remove thermostat (1).

Check rubber section (2) for damage.

Remove connecting pipes (2).

Installation:

Replace all O-rings on connecting pipes.

Fig 7: Identifying Connecting Pipes And Thermostat

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Assemble engine.

Vent COOLING SYSTEM and check for leaks.