Camshaft Timing Chain, Removing From Camshafts: Notes

Special tools and workshop equipment required 

• Counterhold - Multiple Use :T10172A 
• Assembly Tool :T10352A 
• Locking Pin (3 pc.) :T40011 
• Chain Tensioner Lever :T40243 
• Wrench - 21mm :T40263 
• Adapter :T40266 
• Tensioner Locking Tool :T40267 
• Camshaft Locks :T40271 
• Adapter :T40314 
• 24 mm Socket

Mandatory Replacement Parts 

• Bolts - Bearing Bracket
• Plug - Lower timing chain cover
• Bolts- Cylinder head
• Bolt - Lower timing chain cover

Procedure

Preliminary work may be required depending on the model. Refer to CHAIN DRIVE .

-- Open the clamps -1 and 2- and remove the air duct hoses.

-- Remove the bolts -arrows- and remove the air duct pipe.

-- Remove the upper timing chain cover. Refer to UPPER TIMING CHAIN COVER, REMOVING AND INSTALLING .

TIP: 

The control valves have left-hand thread.

-- Depending on the version, remove the control valve in the direction of -arrow- using either the :T10352A  or :T10352/1A  .

-- To do so counterhold on the vibration damper with the :T40263  , :T40314  and the 24 mm socket.

-- Remove the bolts -arrows-.

• Carefully remove the bearing mount, without tilting.

-- Remove the bearing mount.

-- Turn the vibration damper in the "TDC" position.

• The notch on the vibration damper and the marking on the lower cover for timing chain must be opposite one another -arrow-.
• The markings -1- on the camshaft chain sprockets must point upward.

TIP: 

The combination of the :T40263  , : T40314  and 24 mm socket are better suited than the :T10355  for positioning the vibration damper.

-- Mark the camshaft timing chain and the cylinder head -arrows- to match the marking on the chain sprockets -1- with a waterproof marker.

-- In addition, mark the camshaft timing chain to the camshaft timing chain guide rail -2- with a waterproof marker.

-- Remove the plug -arrow-.

-- Remove the bolts -arrows-.

-- Remove the bolt -arrow-.

Two Different Chain Tensioners May Be Installed Depending on the Version: 

Version 1: 

-- Install the :T40243  -arrows-.

-- Lift up the locking wedge for the chain tensioner by inserting a scriber or a suitable screwdriver into the chain tensioner opening in direction of -arrow 1-. Slowly press and hold the :T40243  in direction of -arrow 2-.

-- Secure the chain tensioner using the :T40011  .

Version 2: 

-- Install the :T40243  -arrows-.

-- Press the chain tensioner circlip -1- together and slowly press and hold the :T40243  in the direction of -arrow-.

-- Secure the chain tensioner with the :T40267  .

All Versions: 

-- Remove the :T40243  .

-- Bolt the :T40271/2  to the cylinder head and push the chain sprocket splines in the direction of -arrow 2-. If necessary, turn the intake camshaft with a wrench in direction of -arrow 1-.

With Wrench Clearance: 

-- Install the :T40271/1  on the cylinder head. Counterhold the camshaft with a wrench in a clockwise direction -arrow-.

-- Remove the bolt -A- and slide the tensioning rail down. At the same time continue counterholding the camshaft.

-- Turn the exhaust camshaft clockwise in the direction of -arrow- until the :T40271/1  can be slid into the chain sprocket splines.

Without Wrench Clearance: 

-- Install the :T40271/1  on the cylinder head.

The help of a second technician is necessary for the following steps.

-- Hold the exhaust camshaft securely with the :T10172A  in the direction of the arrow -A-. Remove the bolt -1- and guide the tensioning rail -2- downward.

-- Turn the exhaust camshaft clockwise in the direction of -arrow A- until the :T40271/1  can be pushed into the chain sprocket splines -C- in the direction of -arrow B-.

All Versions: 

TIP: 

Mark the camshafts to the : T40271/1  and : T40271/2  .

When using new camshafts: transfer the self-made markings from the old camshafts to the new camshafts.

Not making the marks will result in much more work when reinstalling.

-- Mark the camshaft sprocket to the :T40271/1  and the :T40271/2  -arrow-.

-- Remove the upper guide rail -1- by unlocking the catch with a screwdriver and pushing the guide rail forward.

-- Remove the camshaft timing chain from chain sprockets.