Timing Mechanism Drive Chain

Timing Mechanism Drive Chain

Removing

Proceed as follows:

- Removing engine => [ Engine, Removing ] Engine, Removing.

- To separate engine and transmission: => [ Engine and Transmission, Separating ] Engine and Transmission, Separating.

- Fasten the engine on the engine and transmission holder => [ Engine and Transmission, Securing to Holder ] Engine and Transmission, Securing to Holder.

- Remove cylinder head cover => [ Cylinder Head Cover ] Service and Repair.

- On a vehicle with automatic transmission, remove drive plate => [ Drive Plate ] Drive Plate.

- Remove oil pan => [ Oil Pan ] Oil Pan.

- Remove camshaft timing chain from camshafts => [ Camshaft Timing Chain, Removing from Camshafts ] Camshaft Timing Chain, Removing From Camshafts.

- Remove timing chain lower cover => [ Lower Timing Chain Cover ] Lower Timing Chain Cover.

- Mark camshaft timing chain running direction with arrows using paint - upper arrow - for reinstallation.





Risk of damaging timing mechanism drive chain.

• Do not mark timing mechanism with a chain punch, notch or something similar.

- Adjust crankshaft at vibration damper bolt in direction of engine rotation to "TDC" marking.

• Markings on vibration damper and sealing flange must align - arrow -.





• Camshaft bar (T10068 A) must engage in grooves on both camshafts at the same time.





• Due to the camshaft adjuster function, the camshaft grooves may not be perfectly horizontal. Therefore, turn the camshaft back and forth slightly with an open end wrench - arrows - if necessary to insert the camshaft bar (T10068 A).





• If the camshaft bar (T10068 A) does not engage, rotate the crankshaft 1 rotation further in direction of engine rotation.

- Remove camshaft timing chain tensioner - arrow -.





- Counter hold with counter hold (T10069) at vibration damper bolt.





- Loosen chain sprocket bolt - arrow - approximately 1 turn.





- Remove timing mechanism drive chain tensioner - arrows -.





- Remove chain sprocket bolt - arrow -.





- Remove camshaft timing chain sprocket with timing chain from timing mechanism drive chain sprocket - arrow - and pivot to side.





- Remove timing mechanism drive chain sprocket with drive chain.





• Ignore - A and B -.

Installing





• Tightening specifications => [ Camshaft Timing Chains, Assembly Overview ] Camshaft Timing Chains, Assembly Overview.

• Replace bolts which have been tightened to specifications.

- When reinstalling a used timing mechanism drive chain, note running direction marking - lower arrow -.

- Install timing mechanism drive chain together with chain sprocket on oil pump.

• Installation only possible in one position.

- If large chain sprocket cannot be installed, rotate oil pump shaft slightly.

- Check if crankshaft is in "TDC" position:

• Milled drive chain sprocket tooth must align with bearing joint - arrow A -.





• Tab on chain sprocket must align with tab - arrow B - on oil pump housing.

- Install camshaft timing chain sprocket with timing chain in place.





• Pins on back side of chain sprocket must engage in cut outs - arrow -.

- Tighten chain sprocket bolt - arrow - by hand.





- Release locking splines in chain tensioner with a small screwdriver - arrow - and press tensioning rail against chain tensioner.





- Tighten chain tensioner while pressed down - arrows -.





- Counter hold with counter hold (T10069) at vibration damper bolt.





- Tighten chain sprocket bolt - arrow -.





- Install camshaft timing chain tensioner - arrow -.





- Remove camshaft bar (T10068 A).





- Rotate crankshaft 2 revolutions in direction of engine rotation at vibration damper bolt and place at "TDC" marking.





• Markings on vibration damper and sealing flange must align - arrow -.

• Camshaft bar (T10068 A) must engage in grooves on both camshafts at the same time.





• Due to the camshaft adjuster function, the camshaft grooves may not be perfectly horizontal. Therefore, turn the camshaft back and forth slightly with an open end wrench - arrows - if necessary to insert the camshaft bar (T10068 A).





• If camshaft bar cannot be engaged, adjust timing again.

• Rotate crankshaft 2 revolutions in direction of engine rotation at vibration damper bolt and place at "TDC" marking.

• Check timing again.

- Install timing chain lower cover => [ Lower Timing Chain Cover ] Lower Timing Chain Cover.

- Install oil pan => [ Installing ] Oil Pan.

- Install drive plate => [ Drive Plate ] Drive Plate.

- Install cylinder head cover => [ Cylinder Head Cover ] Service and Repair

- Install engine => [ Engine, Installing ] Engine, Installing.

- Fill engine oil and check oil level.