11 31 095 Removing hydraulic chain tensioner for timing chains on right side (N74)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2016 BMW 760Li, 2015 BMW 760Li, 2014 BMW 760Li, 2013 BMW 760Li, and 2012 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Chain tensioner is pre-tensioned.
Release lock pin only in installed state.

Risk of injury!

IMPORTANT: Risk of damage!

The engine must not be cranked when the chain tensioner is removed.

The timing chain may jump.

Necessary preliminary tasks:

Remove TIMING CASE COVER at top right

Crank engine back at central bolt (1) against direction of engine rotation by approx. 180°.

NOTE: Illustration shows N63.

Fig 1: Turning Central Bolt Against Direction Of Engine Rotation By Approx. 180°

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The timing chain on the chain tensioner becomes the tight end on cranking back.

Do not crank engine without chain tensioner or special tool 11 9 900 .

Piston (1) of chain tensioner must be pressed in against oil pressure in housing (see arrow in illustration).

NOTE: Illustration shows N63.

Fig 2: Pressing Chain Tensioner Piston

Courtesy of BMW OF NORTH AMERICA, INC.

Insert special tool 11 4 120 into bore hole.

Release screws (1).

Tightening torque: see 7AZ in 11 31 CAMSHAFT

Remove chain tensioner (2).

Fig 3: Removing Chain Tensioner

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of injury!

Chain tensioner is under high preload force.

Chain tensioner arrangement:

Piston
Expansion element
Compression spring
Housing

Fig 4: Identifying Chain Tensioner Components

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace all gaskets and sealing rings .

Assemble engine.