Camshaft Timing Chain, Removing And Installing, Engine With Two Camshaft Adjusters: Removing

Preliminary work may be required depending on the model. Refer to OVERVIEW - CAMSHAFT TIMING CHAIN, ENGINE WITH TWO CAMSHAFT ADJUSTERS  .

-- Remove the noise insulation. Refer to Overview - Noise Insulation and Noise Insulation, Removing And Installing .

-- Remove the upper timing chain cover. Refer to TIMING CHAIN COVER, REMOVING AND INSTALLING, ENGINE WITH TWO CAMSHAFT ADJUSTERS .

• Pay attention to the direction of rotation: the control valves have left-hand threads - risk of damaging the threads.

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-- Remove the left and right control valve in direction of -arrow-.

Depending on the version of the control valve use one of the tools listed:

• : T10352B 
• : T10352/1A 
• : T10352/2 
• : T10352/3 
• : T10352/4 

-- To do so counterhold the crankshaft 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 mount, without tilting.

-- 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 camshafts 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 bracket in direction of -arrow- and lock with : T40011  .

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-- Remove the bolt -1- and the chain tensioner -2-.

-- Remove the oil pump chain from the three-layer chain sprocket, pull forward and place at the bottom of the oil pump chain sprocket.

-- Remove the bolts -arrows-.

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-- Install the : T40243  on the cylinder head -arrows lower -.

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

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

• This will push back the chain tensioner.

TIP: 

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

-- Lock the chain tensioner with the : T40267  .

-- Remove the : T40243  .

-- Bolt the : T40271/2  to the cylinder head and push the chain sprocket splines in direction of -arrow 2-. If necessary, turn the intake camshaft with an : T40266  in direction of -arrow 1-.

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

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

-- Hold the exhaust camshaft with the : T40266  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 in the chain sprocket splines -C-, in direction of -arrow B-.

-- Remove the guide rail -1- by unlocking the latch -arrow- with a screwdriver and pushing the guide rail forward.

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-- Remove the bolts -arrows- and remove the chain tensioner -1-.

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

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-- Remove the camshaft timing chain from the camshaft sprockets and hang it on the camshaft pins -arrows-.

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-- Remove the chain tensioner -1- for the balance shaft timing chain.

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-- Remove the bolts -1-. Remove the tensioning rail -2- and the guide rails -3- and -4-.

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-- Loosen the adjusting bolt -A- and remove the tensioning pin -B-.

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-- Remove the oil pump drive timing chain to remove the three stage chain sprocket.

-- Remove the camshaft timing chain and drive chain for the balance shaft.