Installing the Camshaft Timing Chain

WARNING: This page is about a different car, the 2024 Audi Q3 and 2023 Audi Q3. 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 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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Excluding Engine Code DTJA:

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

I -

Use the Adapter:T40266 to turn the exhaust camshaft slightly in the direction of the -arrow A- and push the Camshaft Lock:T40271/1 out of the chain sprocket splines in the direction of the -arrow B-.

II -

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-. Release the camshaft.

-- Turn the intake camshaft using 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 in direction of -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 .

Engine Code DTJA:

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

-- Lower the pretension of the exhaust camshaft using the Assembly Tool:T40427 in direction of -arrow B- and remove the Camshaft Lock:T40271/1 from the splines of the chain sprocket in direction of -arrow C-.

-- Remove the exhaust camshaft in the direction of -arrow A- until the timing chain touches the guide rail -3-.

-- Hold the camshaft in this position, insert the tensioning rail -2- and tighten the guide pin -1-.

-- Remove the Camshaft Lock:T40271/1 .

-- Reduce the intake camshaft pretension using the Assembly Tool:T40427 in the direction of -arrow A-, pull the Camshaft Lock:T40271/2 out of the chain sprocket splines in direction of -arrow B-, and bring the camshaft into its resting position.

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-- Remove the Camshaft Lock:T40271/2 .

Continuation for All:

Fig 6: Identifying Bolts

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-- Install the bolts -arrows- and tighten them. Tightening specification. Refer to -item 4- OVERVIEW - CYLINDER HEAD List Item:Bolt.

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

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TIP:

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 Tensioner Locking Tool: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 Locking Pin (3 pc.):T40011 . The oil pump chain tensioner bracket must make contact in the opening on 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 7- OVERVIEW - CAMSHAFT TIMING CHAIN, ENGINE WITH TWO CAMSHAFT ADJUSTERS List Item:Control Valves.

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

TIP:

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 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 OVERVIEW - VACUUM PUMP .

-- 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