Camshaft Timing Chain, Removing And Installing: Removing

-- Remove the bearing bracket. Refer to BEARING BRACKET, REMOVING AND INSTALLING .

-- Vibration damper version 1 Refer to Figure: turn the crankshaft on the vibration damper using the Wrench - 21mm: T40263  , Adapter: T40314  and the 24 mm socket until the vibration damper is at "TDC".

-- Vibration damper, version 2. Refer to Figure: use an offset open-end wrench - 24 mm to turn the crankshaft at the vibration damper so far, that the vibration damper is set to "OT".

• The markings -3- from the camshaft chain sprockets -2 and 4- must point upward respectively.

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• The notch -arrow- on the vibration damper -1- and the arrow marking -5- on the lower timing chain cover must be align.

TIP: 

Depending on the version the arrow mark -5- is not present. It is enough that the marks -3- point upward.

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

-- Check the "TDC point" again.

-- Disengage the tension spring wire clip -3- from the oil pan upper section -arrow-.

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-- Remove the guide pin -2- and the chain tensioner.

-- Remove the drive chain -1- for the oil pump from the three-layer chain sprocket and let hang at the Assembly Tool : T10531/6  .

-- Remove the bolts -arrows-.

-- Install the Chain Tensioner Lever: T40243  on the cylinder head -lower arrows-.

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

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

• This will push back the chain tensioner.

TIP: 

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

-- Lock the chain tensioner with the Locking Tool: T40435  .

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-- Remove the Chain Tensioner Lever: T40243  .

-- Install the Camshaft Lock: T40271/3  on the cylinder head.

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-- Push the camshaft positioning tool in the splines of the chain sprocket in direction of -arrow B-.

-- If required, turn the intake camshaft with the Assembly Tool: T40427  slightly back and forth in direction of -A arrows-.

-- Install the Camshaft Lock: T40271/4  on the cylinder head.

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

-- Hold the exhaust camshaft using the Assembly Tool: T40427  . Remove the guide pin -1- and remove the tensioning rail -2- downward.

-- Turn the exhaust camshaft clockwise in direction of -arrow A- again until the Camshaft Lock: T40271/4  can be pushed in the chain sprocket splines in direction of -arrow B-.

-- Remove bolts -arrows- and remove guide rail -1-.

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-- Remove the guide pin -1- and the guide rail -2-.

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-- Remove the camshaft timing chain from the camshaft sprockets and remove downward.