When replacing the pistons: Remount all connecting rods

NOTE: TECHNICAL INFORMATION
Wear safety goggles.

NOTE: The description is provided only at one component. The procedure is the same for all other components.

Use the special tools 2 463 754, 2 410 685 and 2 447 297 to remove the piston from the connecting rod.

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: Piston pin circlip with preload .
Injury hazard!

The use of the specified special tool for the disassembly or installation is mandatory.
Wear safety goggles.

Courtesy of BMW OF NORTH AMERICA, INC.

Use the special tool 2 447 297 to remove the piston pin circlip.
Insert the flat side (3) of the special tool into the groove (4) .
Use the curved side (1) to grip and remove the piston pin circlip (2) .

Check

NOTE: TECHNICAL INFORMATION
Piston and piston pin are matched to each other.
Always install piston and piston pin together and do not switch by mistake.

Check whether the piston pin (1) has noticeable play in the piston.
Check whether the piston pin (1) can be removed without excessive force.

Courtesy of BMW OF NORTH AMERICA, INC.

Result

» The piston pin (1) is difficult to remove.

Piston pin (1) exhibits noticeable play.

Measure

Replace the piston (2) and the piston pin (1) .

Replace the piston.
Parts: Pistons

NOTE: TECHNICAL INFORMATION
Piston and piston pin are matched to each other.
Always install piston and piston pin together and do not switch by mistake.

Install piston pins (1) in the piston (2) and the connecting rod (3) .

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: Piston pin circlip with preload .
Injury hazard!

The use of the specified special tool for the disassembly or installation is mandatory.
Wear safety goggles.

Position the piston pin circlip (1) such that the opening in the marked area of piston pin circlip points in the direction of piston crown (2) .

Courtesy of BMW OF NORTH AMERICA, INC.
Preload the piston pin circlip (1) with your thumb.
Press the piston pin circlip simultaneously with the special tools 2 410 685 and 2 463 754 into the piston.
Add the special tool 2 410 685 in a rotating manner and press the piston pin circlip completely into the piston.

Courtesy of BMW OF NORTH AMERICA, INC.
Check whether the piston pin circlip (1) fits correctly in the groove (2) .
Check whether the opening in the marked area of the circlip of the piston pin circlip in the direction of the piston crown (3) .

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: TECHNICAL INFORMATION
Wear safety goggles.

NOTE: The description is provided only at one component. The procedure is the same for all other components.

Use the special tools 2 463 754, 2 410 685 and 2 447 297 to remove the piston from the connecting rod.

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: Piston pin circlip with preload .
Injury hazard!

The use of the specified special tool for the disassembly or installation is mandatory.
Wear safety goggles.

Courtesy of BMW OF NORTH AMERICA, INC.

Use the special tool 2 447 297 to remove the piston pin circlip.
Insert the flat side (3) of the special tool into the groove (4) .
Use the curved side (1) to grip and remove the piston pin circlip (2) .

Check

NOTE: TECHNICAL INFORMATION
Piston and piston pin are matched to each other.
Always install piston and piston pin together and do not switch by mistake.

Check whether the piston pin (1) has noticeable play in the piston.
Check whether the piston pin (1) can be removed without excessive force.

Courtesy of BMW OF NORTH AMERICA, INC.

Result

» The piston pin (1) is difficult to remove.

Piston pin (1) exhibits noticeable play.

Measure

Replace the piston (2) and the piston pin (1) .

Replace the piston.
Parts: Pistons

NOTE: TECHNICAL INFORMATION
Piston and piston pin are matched to each other.
Always install piston and piston pin together and do not switch by mistake.

Install piston pins (1) in the piston (2) and the connecting rod (3) .

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: Piston pin circlip with preload .
Injury hazard!

The use of the specified special tool for the disassembly or installation is mandatory.
Wear safety goggles.

Position the piston pin circlip (1) such that the opening in the marked area of piston pin circlip points in the direction of piston crown (2) .

Courtesy of BMW OF NORTH AMERICA, INC.
Preload the piston pin circlip (1) with your thumb.
Press the piston pin circlip simultaneously with the special tools 2 410 685 and 2 463 754 into the piston.
Add the special tool 2 410 685 in a rotating manner and press the piston pin circlip completely into the piston.

Courtesy of BMW OF NORTH AMERICA, INC.
Check whether the piston pin circlip (1) fits correctly in the groove (2) .
Check whether the opening in the marked area of the circlip of the piston pin circlip in the direction of the piston crown (3) .

Courtesy of BMW OF NORTH AMERICA, INC.