Camshaft Timing Chain, Removing And Installing: Installing

WARNING: This page is about a different variant/trim than selected.

Fig 1: Check The Crankshaft @ TDC

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-- Check that the crankshaft is at TDC. The flat area on the crankshaft -arrow- must be horizontal.

-- Draw the markings on the cylinder block -1-, as shown, with a waterproof marker.

-- Draw a marking -2- on the three stage chain sprocket tooth -1- with a waterproof marker.

Fig 2: Draw Marking On Three Stage Chain Sprocket Tooth

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-- Turn the intermediate sprocket and balance shaft to the marks -arrow-, but do not loosen the bolt -1-.

Fig 3: Identifying Intermediate Shaft Sprocket

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NOTE:

The painted links of the chain must be positioned on the markings on the chain sprockets.

Fig 4: Identifying Chain Sprockets

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Ignore the position of any additional painted chain links that may also be present.

-- Lay the balance shaft drive chain, and position the painted links -arrows- on the chain sprocket markings.

-- Install the guide rail -1- and tighten the bolts -arrows-.

Fig 5: Identifying Guide Rail And Tighten Bolts

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-- Engage the camshaft timing chain with the painted links -arrows- on the camshaft pins.

Fig 6: Camshaft Timing Chain And Camshaft Sprocket

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-- Lay the oil pump drive timing chain onto the three stage chain sprocket.

Fig 7: Identifying Three Stage Chain Sprocket

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-- Tilt the three stage chain sprocket in the direction of -arrow- toward the engine and secure it to the crankshaft. The marks -arrows- must be positioned opposite each other.

-- Install the : T10531/2 in the crankshaft and tighten hand-tight.

Fig 8: Identifying Assembly Tool - Turning Over Tool T10531/3

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-- Install the : T10531/3 . Tighten the : T10531/4 hand-tight. Using a 32 mm open end wrench move the : T10531/1 back and forth slightly while doing this tighten the : T10531/4 until the chain sprocket is seated securely on the crankshaft splines. Now tighten the adjusting bolt -A-.

-- Position the painted chain link in the balance shaft drive chain -arrow- at the mark on the three stage chain sprocket. Install the tensioning rail -1- and the guide rail -2-. Tighten the bolts -3-.

Fig 9: Identifying Painted Chain Link In Balance Shaft Drive Chain

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-- Install the chain tensioner -1-.

Fig 10: Chain Tensioner And Balance Shaft Timing Chain

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-- Check the adjustment again. The painted chain links -arrows- must line up with the markings on the chain sprockets.

Fig 11: Identifying Painted Chain Links

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-- Place the camshaft timing chain on the intake camshaft, exhaust camshaft and the crankshaft. Position the painted chain links -arrows- on the markings on the chain sprockets.

Fig 12: Camshaft Timing Chain And Intake Camshaft

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-- Install the guide rail -2- and tighten the bolts -1-.

Fig 13: Removing Glide Rail

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-- Install the upper guide rail -1-.

Fig 14: Removing Guide Rail

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

-- Turn the exhaust camshaft slightly in the direction of the -arrow A- using the : T40266 and push the : T40271/1 out of the chain sprocket splines in direction of -arrow B-. Release the camshaft in the direction of -arrow C-, until the timing chain touches the guide rail -1-. Hold the camshaft in this position, install the tensioning rail -2- and tighten the bolts -3-.

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-- Install the chain tensioner -1- and tighten the bolts -arrows-.

Fig 15: Bolts And Chain Tensioner

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-- Install the chain tensioner -2-. The wire clip -arrow- must come in to contact with the oil pan upper section opening. Tighten the bolt -1- and remove the : T40011 .

Fig 16: Identifying Chain Tensioner

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-- Turn the intake camshaft in the direction of the -arrow 1- using the : T40266 until the : T40271/2 in direction of -arrow 2- can be pushed out of the chain sprocket splines. Release the camshaft.

Fig 17: Identifying Assembly Tool T40266 And Camshaft Clamp T40271/2

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-- Remove the : T40271/1 and : T40271/2 .

-- Check the adjustment. The painted chain links -arrows- must line up with the markings on the chain sprockets.

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-- Install the screws -arrows- and tighten. Tightening specification -item ) OVERVIEW - CYLINDER HEAD - List Item: Bolt.

Fig 18: Identifying Bolts

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-- Lubricate the holes -arrows- with engine oil.

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NOTE:

The adapter sleeve -1- is not present on every bearing bracket.

-- Attach the bearing mount. Do not tilt it when doing this. Hand-tighten the bolts -arrows-.

Fig 19: Identifying Bolts

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-- Remove the : T40267 .

Fig 20: Securing Chain Tensioner With T40267

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-- Tighten the bearing bracket bolts. Refer to -item ) OVERVIEW - CAMSHAFT TIMING CHAIN - List Item: Bolt.

-- Install the control valves -item ) OVERVIEW - CAMSHAFT TIMING CHAIN - List Item: Control Valves.

-- Let the engine turn a second time in the direction of engine rotation.

NOTE:

Due to the ratio, the painted chain links no longer match up after the engine has been turned.

-- Remove the turning over tool and install the lower timing chain cover. Refer to Installing .

Fig 21: Identifying 8 Bolt Timing Chain Lower Cover Bolt Tightening Sequence

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NOTE:

Tighten the bolts -1 and 4- with an additional turn after installing the vibration damper. The bolts must be removed again to install the vibration damper.

-- Install the vibration damper. Refer to VIBRATION DAMPER, REMOVING AND INSTALLING .

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

-- Install the ribbed belt tensioner. Refer to RIBBED BELT TENSIONER, REMOVING AND INSTALLING .

-- Install the ribbed belt. Refer to RIBBED BELT, REMOVING AND INSTALLING .

Further installation is performed in reverse order of removal, while noting the following:

-- After performing work on the chain drive the adaptation value in the Engine/Motor Control Module must be adapted. To do so, turn on the ignition and select the following menu items on the Vehicle Diagnostic Tester:

01 - Engine Electronics
Guided Functions
01 - Adaptation after repair work on the chain drive