Timing Chain Tensioner: Service and Repair

WM 153619 Removing and installing chain tensioner on V6 DFI engines

Tools





Technical values






Preliminary work

1. Remove engine compartment cover on the right and in the centre. => 700219 Removing and installing front trim (engine compartment) - section on "Removing"
2. Move bonnet to service position using special tool bonnet stay 9704.

Removing chain tensioner

NOTICE

Danger of timing chain jumping out of position

- Risk of engine damage

-> Never turn the engine at the crankshaft without a chain tensioner.
-> Never turn the crankshaft against the direction of rotation.
-> Always counter the sprockets when performing assembly work on them.
-> Make sure that nobody starts the engine or pushes the vehicle while in gear when the chain tensioner is removed. To prevent this, stick a warning note on the steering wheel or ignition lock.

1. Remove chain tensioner.
1.1. The chain tensioner is on the right side of the upper timing-case cover - arrow -.





Installation position of chain tensioner

Installing chain tensioner

NOTICE

Danger of timing chain jumping out of position

- Risk of engine damage

-> Never turn the engine at the crankshaft without a chain tensioner.
-> Never turn the crankshaft against the direction of rotation.
-> Always counter the sprockets when performing assembly work on them.
-> Make sure that nobody starts the engine or pushes the vehicle while in gear when the chain tensioner is removed. To prevent this, stick a warning note on the steering wheel or ignition lock.

1. Install chain tensioner.

Information

- Replace sealing ring on chain tensioner.

1.1. Always replace sealing ring on chain tensioner.
1.2. Tighten chain tensioner by hand.
1.3. Tighten the chain tensioner using a torque wrench => Tightening torque: 50 Nm (37 ftlb.).





Chain tensioner and upper timing-case cover

Subsequent work

1. Remove special tool bonnet stay 9704 and fit the gas-filled shock absorber.
2. Install engine compartment cover on the right and in the centre.=> 700219 Removing and installing front trim (engine compartment) - section on "Installing"