N62 B44

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Lightly coat pistons and piston rings with oil.

Offset the contact points of the piston rings by approx. 120° to each other but do not position above the piston pin boss.

Compress piston rings with special tool 11 9 500.

Fig 1: Compressing Piston Rings With Special Tool 11 9 500

Courtesy of BMW OF NORTH AMERICA, INC.

Keep piston rings compressed with special tool 11 9 500.

Fig 2: Keeping Piston Rings Compressed With Special Tool 11 9 500

Courtesy of BMW OF NORTH AMERICA, INC.

Install piston so that arrow points to camshaft drive.

CAUTION: Danger of piston ring failure.

Only press pistons into place with finger force - do not knock in!