Camshaft Timing Chain, Removing And Installing: Removing

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

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

TIP: 

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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.

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-- Remove the bolts -arrows-.

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• Carefully remove the bearing bracket without tilting it.

-- Remove the bearing mount.

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

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• 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.

-- Remove the lower timing chain cover. Refer to LOWER TIMING CHAIN COVER, REPLACING .

-- Check the "TDC point" again.

-- Press the oil pump chain tensioner in the direction of -arrow- and secure it with a :T40011  .

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-- Remove the guide pin -1- and the chain tensioner.

-- Remove the oil pump drive chain.

-- Remove the bolts -arrows-.

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

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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-.

TIP: 

The chain tensioner is lubricated with oil and can only be pushed back slowly by applying constant pressure.

-- Secure the chain tensioner using the :T40011  .

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Version 2: 

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-- Install the :T40243  -arrows-.

-- Press the chain tensioner circlip -1- together and hold it.

-- Slowly press and hold the :T40243  in direction of -arrow-.

TIP: 

The chain tensioner is lubricated with oil and can only be pushed back slowly by applying constant pressure.

-- Secure the chain tensioner with the :T40267  .

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All Versions: 

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-- Remove the :T40243  .

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

With Wrench Clearance: 

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

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

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

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

Without Wrench Clearance: 

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-- 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 direction of -arrow A-. Remove the bolt -1- and guide the tensioning rail -2- downward.

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

All Versions: 

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-- Remove the upper guide rail -arrow- by unlocking the latch with a screwdriver and pushing the guide rail forward.

-- Remove the bolts -1- and remove the guide rail -2-.

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-- Remove the timing chain.