51 23... Adjusting/replacing bump stops

The illustrations are schematic representations and are to be applied to the relevant vehicle type.

Version 1: 

Following parts must not be damaged:

• (1) Bump stop
  Fig 1: Identifying Bump Stop

  Courtesy of BMW OF NORTH AMERICA, INC.

Adjust bump stop (1) to correct height by turning left or right.

Version 2: 

Replace damaged bump stops:

• (1) Bump stop with ejector
  Fig 3: Identifying Bump Stop With Ejector

  Courtesy of BMW OF NORTH AMERICA, INC.

Press ejector (1) into bump stop and, in this position, twist approx. 90° counterclockwise with a Phillips screwdriver.

This locks the ejectors (1) in the bump stops.

Adjust bump stop (2) to correct height by turning left or right.

Unlock the ejector (1) again after completing adjustment.

Version 3: 

Replace damaged bump stops:

• (1) Bump stop

Turn lock (1) 45° counterclockwise.

Pull bump stop (2) upwards.

Close lid slowly until it is at the same height as the side panel.

Open lid and turn lock (1) clockwise.

Installation: 

Press bump stop into panel and drive in expanding pins (3).

The illustrations are schematic representations and are to be applied to the relevant vehicle type.

Prerequisite: Lid must be correctly adjusted.

Following parts must not be damaged:

• (1) Bump stop
• (2) Catches

Remove adjusting buffer by pressing catches back.

Screw in adjusting buffer (1) to create clearance to engine compartment lid.

Place a cone (2) of modeling or sealing compound on adjusting buffer.

Slowly close engine compartment lid.

Raise engine compartment lid.

Compressed cone (1) determines clearance between adjusting buffer and engine compartment lid.

Measure dimension a between compressed cone and edge (1) of adjusting buffer.

Adjust measured dimension a + 0.5 mm by unscrewing adjusting buffer (1).

The graphics are schematic representations and are to be applied to the relevant vehicle type.

Prerequisite: Lid must be correctly adjusted.

Version 1: 

Following parts must not be damaged:

• (1) Bump stop
  Fig 1: Identifying Bump Stop

  Courtesy of BMW OF NORTH AMERICA, INC.

Adjust bump stop (1) to correct height by turning left or right.

Type 2: 

Replace damaged bump stops:

• (1) Bump stop
  Fig 3: Identifying Bump Stop

  Courtesy of BMW OF NORTH AMERICA, INC.

Adjusting version 2:

Turn lock (1) 45° anticlockwise.

Pull bump stop (2) upwards.

Close lid slowly until it is at the same height as the side wall.

Open lid and turn lock (1) clockwise.

Installation note: 

Press bump stop into sheet metal part and drive in expanding pins (3).

Version 3: 

Lever out expanding rivets (1).

Remove bump stop (2).

Adjusting version 3:

Checking correct adjustment:

• Insert a strip of paper (normal writing paper) between bump stop and stop on body.
• Close lid. Make sure that the paper strip remains between bump stop and stop.
• The bump stop is correctly adjusted when the paper strip can be pulled out "with slight resistance".
  Fig 6: Rotating Paper Strip Of Bump Stop

  Courtesy of BMW OF NORTH AMERICA, INC.

Adjusting procedures 

Screw in bump stop until the paper strip can be easily pulled out.

Then unscrew bump stop until the paper strip cannot be pulled out any more.

Screw in bump stop until the paper strip can be pulled out "with slight resistance".

Version 4: 

Lever out expanding rivets (1).

Remove bump stop (2).

Adjusting version 4:

Set bump stop to the correct height by turning to the left or right.