Timing Chain Tensioner: Service and Repair

WM 153619 Removing and installing chain tensioner

Technical values





Preliminary work

1. Remove engine compartment trim panel at the right. -> 700219 Removing and installing front trim (engine compartment)

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 the chain tensioner -arrow- by hand.
1.3. Tighten the chain tensioner using a torque wrench. => Tightening torque: 50 Nm (37 ftlb.)





Chain tensioner

Subsequent work

1. Install engine compartment trim panel at the right -> 700219 Removing and installing front trim (engine compartment).