17 11 100 Remove and install/replace the coolant expansion tank

Attention! 

Make sure without fail that coolant hoses are correctly routed. Risk of damage due to sharp edges or chafing.

Follow the notes for REPAIR WORK ON COOLING SYSTEM .

Necessary preliminary tasks: 

• Remove LEFT HEADLIGHT . (F54, F55, F56, F57) 
• Remove INTAKE SILENCER HOUSING .

Removal: 

Release expanding rivet and remove mounting for gasket (1).

Fig 1: Locating Expanding Rivet And Gasket

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Release screws (1).

Fig 2: Locating Expanding Rivet And Gasket

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Release screws (1).

Slacken nut (2).

Release screw (3).

Raise left lock support slightly.

Fig 3: Coolant Expansion Tank Nut And Screws

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Release screw (1).

Unlock and detach coolant lines (2).

Unlock coolant line (3) and pull off.

Catch and dispose of escaping coolant.

Fig 4: Coolant Lines And Screw

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Release expanding rivets (1).

Release trim panel and place to side.

Fig 5: Trim Panel And Expanding Rivets

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Raise left lock support (2) slightly.

Raise expansion tank (3) slightly until guide pin (1) is released from guide.

Attention! 

Risk of damage  ! Make sure the guide pin is not damaged.

Fig 6: Left Lock Support, Expansion Tank And Guide Pin

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Thread expansion tank (1) out sideways and remove.

Fig 7: Threading Expansion Tank Out Sideways

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Installation: 

Thread expansion tank (1) in sideways.

Fig 8: Threading Expansion Tank In Sideways

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Raise left lock support (2) slightly.

Insert expansion tank (3) with guide pin (1) into guide.

Fig 9: Left Lock Support, Expansion Tank And Guide Pin

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Tighten screw (1).

Tightening torque 17 10 3AZ .

Connect coolant lines (2) to expansion tank.

Coolant lines (2) must audibly engage.

Connect coolant line (3) to expansion tank.

Coolant line (3) must audibly engage.

Fig 10: Coolant Lines And Screw

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Fasten trim panel (2) with expanding rivets (1).

Fig 11: Trim Panel And Expanding Rivets

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Tighten down nuts (1).

Tightening torque 17 10 7AZ .

Tighten down nuts (3).

Tightening torque 17 10 6AZ .

Tighten screw (2).

Tightening torque 17 10 5AZ .

Fig 12: Coolant Expansion Tank Nut And Screws

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Tighten down screws (1).

Tightening torque 17 10 8AZ .

Fig 13: Coolant Expansion Tank Screws

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Join mounting for gasket (1) and secure with expanding rivet.

Fig 14: Locating Expanding Rivet And Gasket

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