Installing the Camshaft Timing Chain

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

Fig 1: Camshaft Timing Chain And Camshaft Sprocket

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

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

Fig 2: Camshaft Timing Chain And Intake Camshaft

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

Fig 3: Removing Glide Rail

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-- Install the upper guide rail -1-.

Fig 4: Removing Guide Rail

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

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I - Turn the exhaust camshaft slightly in direction of -arrow A- using the : T40266 and push the : T40271/1 out of the chain sprocket splines in direction of -arrow B-.

II - Release the camshaft in 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-. Release the camshaft.

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

Fig 5: Identifying Assembly Tool T40266 And Camshaft Clamp T40271/2

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

-- Install the bolts -arrows- and tighten them. Tightening specification -item ) Bolt.

Fig 6: 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.

Carefully connect the bearing bracket without tilting - risk of damage.

Fig 7: Identifying Bolts
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-- Mount the bearing bracket and the bolts -arrows- hand-tight.

-- Remove the : T40267 .

Fig 8: Securing Chain Tensioner With T40267

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-- Tighten the bearing bracket bolts. Refer to Figure.

-- Install the chain tensioner -2- and tighten the bolt -1-. Remove the : T40011 , the oil pump chain tensioner must come into contact with the cut-out in the oil pan upper section -arrow-.

Fig 9: Identifying Chain Tensioner

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

Fig 10: Identifying Painted Chain Links Must Line Up With Markings On Chain Sprockets

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-- Install the control valves -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 : T10531/4 and remove the : T10531/3 .

Fig 11: Identifying Assembly Tool - Turning Over Tool T10531/3

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

-- Install the engine support. Refer to ENGINE SUPPORT, REMOVING AND INSTALLING .

-- Install the vacuum pump. Refer to VACUUM PUMP, REMOVING AND INSTALLING .

-- Install the high pressure pump. Refer to HIGH PRESSURE PUMP, REMOVING AND INSTALLING .

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

There are additional procedures depending on the model. Refer to CAMSHAFT, REMOVING AND INSTALLING .

After Removing or Replacing the Camshafts the Adaptation Values for the Chain Length must be Adapted Again.

-- Connect the Vehicle Diagnostic Tester.

-- Select Diagnostic operating mode and Start diagnostics .

-- Select the Select individual test tab and select the following tree structure consecutively:

Drivetrain
Select the engine code and engine
01 - OBD-capable systems .
01 - Engine Electronics
01 - Engine electronics, functions
01 - Chain length diagnostic adaptation

Tightening Specifications

Refer to OVERVIEW - VALVETRAIN