Camshaft, Removing And Installing, Engine With Guide Rail Version 2: Removing

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.

The cylinder head cover sealing surfaces on the cylinder head must not be worked on.
The camshaft bearings are integrated in the cylinder head or cylinder head cover. Before removing the cylinder head cover the tension from the camshaft timing chain must be released.
During installation, all cable ties must be installed at the same location.

Preliminary work may be required depending on the model. Refer to CAMSHAFT, REMOVING AND INSTALLING .

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

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

-- Remove the vacuum pump. Refer to OVERVIEW - VACUUM PUMP .

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

Fig 1: Identifying Assembly Tool T10352/2
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-- Remove the left and right control valve in the direction of -arrow-.

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

Central Valve Assembly Tool:T10352
Assembly Tool:T10352/1A
Assembly Tool :T10352/2
Assembly Tool:T10352/3
Assembly Tool:T10352/4

-- To do so, use the Wrench - 21mm:T40263 , Adapter:T40314 and 24 mm socket to counterhold the crankshaft at the vibration damper.

Fig 2: Using T40263 & T40314

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-- Remove the bolts -arrows-.

Fig 3: Identifying Bolts

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

-- Remove the bearing mount.

TIP:

The combination of the Wrench - 21mm:T40263 , Adapter: T40314 and 24 mm socket are better suited than the Counterhold - Vibration Damper:T10355 for positioning the vibration damper.

With Marks in the Cylinder Head Cover

Fig 4: Identifying Vibration Damper With Counterhold - Vibration Damper T10355

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-- Turn the vibration damper in the "TDC" position.

The notch on the vibration damper must align with the arrow marking on the lower timing chain cover -arrow-.
The markings -1- on the camshaft chain sprockets must be opposite the markings -2 and 3- on the cylinder head.

Without Marks in the Cylinder Head Cover

Fig 5: Identifying Counterhold Tool And Markings

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-- Turn the vibration damper in the "TDC" position.

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.

-- Mark the camshaft timing chain and the cylinder head -arrows- to match the marking on the chain sprockets -1- with a waterproof marker.

Fig 6: Identifying Chain Sprockets

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-- In addition, mark the camshaft timing chain to the camshaft timing chain guide rail -2- with a waterproof marker.

Continuation for All Engines:

Fig 7: Identifying Plug

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-- Remove the plug -arrow-.

-- Remove the bolts -arrows-.

Fig 8: Identifying Bolts

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-- Remove the bolt -arrow-.

Fig 9: Identifying Bolt

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-- Install the Chain Tensioner Lever:T40243 -arrows-.

Fig 10: Identifying Version 2

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A second technician is required for the following steps.

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

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

-- Secure the chain tensioner with the Tensioner Locking Tool:T40267 .

Fig 11: Securing Chain Tensioner

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-- Remove the Chain Tensioner Lever:T40243 .

-- Install the Camshaft Lock:T40271/2 on the cylinder head and slide it into the chain sprocket splines in the direction of -arrow 2-. If necessary, use the Adapter:T40266 to turn the intake camshaft in the direction of -arrow 1-.

Fig 12: Identifying Camshaft Clamp T40271/2 And Assembly Tool T40266

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-- Remove the bolt -1- and guide the tensioning rail -2- downward.

Fig 13: Identifying Tensioning Rail Bolt

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

Fig 14: Identifying Camshaft Clamp T40271/1

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-- Turn the exhaust camshaft with the Adapter:T40266 in the direction of -arrow 1- and slide the Camshaft Lock:T40271/1 into the chain sprocket splines in the direction of -arrow 2-.

-- Mark the camshaft chain sprockets to the Camshaft Locks:T40271/1 and :T40271/2 -arrow-.

Fig 15: Mark Camshaft Sprocket

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-- Remove the upper guide rail -1- by unlocking the catch with a screwdriver and pushing the guide rail forward.

-- Remove the camshaft timing chain from chain sprockets.

CAUTION:

Risk of damaging valves and piston crowns.

- Never turn the crankshaft when the camshaft timing chain is removed.

-- Turn the vibration damper in the opposite direction of the engine rotation out of "TDC".

-- Use the Adapter:T40266 to turn the intake camshaft in the direction of -arrow 1-, slide the Camshaft Lock:T40271/2 out of the chain sprocket splines in the direction of -arrow 2- and move the camshaft into the resting position.

Fig 16: Identifying Adapter T40266 And Intake Camshaft

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-- Use the Adapter:T40266 to turn the exhaust camshaft in the direction of -arrow 1-, slide the Camshaft Lock:T40271/1 out of the chain sprocket splines in the direction of -arrow 2- and move the camshaft into the resting position.

Fig 17: Identifying Camshaft Locating Tool T40271/1

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-- Remove the cylinder head cover bolts in -1 to 6- sequence.

Fig 18: Cylinder Head Cover Bolt Loosening Sequence

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-- Pry up the cylinder head cover -2- using a tool for example a screwdriver -1- starting at the chain side.

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-- Guide the cylinder head cover under the permanent ventilation.

-- Remove the camshaft and cover the open engine components.

-- If necessary for continuing work: mark the roller rocker lever and hydraulic lifter for reinstallation, remove them and place on a clean surface.