Installing the camshaft timing chain

WARNING: This page is about a different car, the 2023 Volkswagen Atlas. However, it is still accessible from the selected car via links, so may be relevant.

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 marked chain sprockets (notch with point behind).

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 the direction of the -arrow A- using the Adapter:T40266 and push the Camshaft Lock:T40271/1 out of the chain sprocket splines -B-.

II -

Release the camshaft in the direction -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.

NOTE:

If the camshaft is not counterheld until the tensioning rail is installed, the timing chain may come off.

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

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

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

-- Install the bolts -arrows- and tighten them. Tightening specification. Refer to OVERVIEW - CYLINDER HEAD => List Item:Bolt.

Fig 6: Identifying Bolts

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

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NOTE:

Drive in the adapter sleeve -1- when reusing the bearing bracket. The adapter sleeve must be flush with the cylinder head side of the bearing bracket.

-- Attach the bearing mount. Do not tilt it when doing this. Tighten the bolts -1 to 6- hand-tight.

Fig 7: Bearing Bracket (With Aluminum Bolts) Tightening Sequence

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-- The adapter sleeve will be pulled in the cylinder head with the bolt -1-.

-- Remove the Tensioner Locking Tool:T40267 .

Fig 8: Securing Chain Tensioner With T40267

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-- Tighten the bearing bracket bolts -arrows-. Tightening specification. Refer to Figure.

Fig 9: Identifying Bolts

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-- Install the chain tensioner -2-. The wire clip must come in to contact with the oil pan upper section opening -arrow-. Tighten the bolt -1- and remove the Locking Pin (3 pc.):T40011 .

Fig 10: 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 11: Identifying Painted Chain Links Must Line Up With Markings On Chain Sprockets

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-- Install the control valves OVERVIEW - CAMSHAFT TIMING CHAINS => 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 Assembly Tool - Knurled Nut:T10531/4 and remove the Assembly Tool - Turning Over Tool:T10531/3 .

Fig 12: Identifying Assembly Tool - Turning Over Tool T10531/3

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-- Install the lower timing chain cover. Refer to Installing .

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.

Fig 13: 8 Bolt Timing Chain Lower Cover Bolt Tightening Sequence

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

-- Install the upper timing chain cover. Refer to 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 .

-- 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 in reverse order of removal. Note the following:

-- After performing work on the chain drive the adaptation value in the engine control module must be adapted. To do so, turn on the ignition and select the following menu items on the Vehicle Diagnostic Tester:

Engine control module, functions

0001 - Adaptation after repair work on chain drive

Tightening Specifications

Refer to OVERVIEW - CAMSHAFT TIMING CHAINS
Refer to OVERVIEW - BALANCE SHAFT DRIVE CHAIN
Refer to OVERVIEW - VALVETRAIN
Refer to OVERVIEW - AIR FILTER HOUSING
Refer to OVERVIEW - HIGH PRESSURE PUMP
Refer to OVERVIEW - NOISE INSULATION .