Camshaft Timing Chain, Removing From Camshafts: Installing

WARNING: This page is about a different car, the 2015 Audi Q7, 2014 Audi Q7, and 2013 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Crankshaft Holder 3242

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Tightening specifications. Refer to OVERVIEW - CAMSHAFT TIMING CHAIN .
Secure crankshaft -1- in "TDC" position using Locking Pin For Crankshaft T40237.

NOTE:

Replace the bolts that were tightened with an additional turn.

-- Check whether camshafts of both cylinder heads stand in "TDC" position.

Fig 2: Identifying Bolt In Camshaft Adjustment Pins T40060

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It must be possible to secure the camshafts with the Camshaft Adjustment PinsT40060.
The bolt -arrow- in the Camshaft Adjustment PinsT40060 must be perpendicular to the center line of the camshaft on cylinder bank 1 (right).

The bolt -arrow- in the Camshaft Adjustment PinsT40060 must be perpendicular to the center line of the camshaft on cylinder bank 2 (left).

Fig 3: Identifying Bolt In Camshaft Adjustment Pins
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-- Remove the Camshaft Adjustment PinsT40060 from both camshafts.

Fig 4: Identifying Camshaft Correction Tool T40061

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CAUTION:

Risk of damaging valves and piston crowns.

If camshafts are rotated, the crankshaft may not rest with any piston at "TDC".

NOTE:

If the camshafts are not secured, it is possible to correct them slightly with the Camshaft Correction ToolT40061 by installing the camshaft chain sprocket on the camshaft.

-- Install the left chain sprocket with the camshaft timing chain.

Fig 5: Identifying Bolts

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The slots in the camshaft chain sprocket must be at the middle position in relation to the threaded holes in the camshaft.

-- Next, loosely install two bolts -1- for the camshaft chain sprocket.

It must still be possible to rotate the camshaft chain sprocket on the camshaft and it must not tip.

-- Secure the left camshaft using the Camshaft Adjustment PinsT40060.

The bolt -arrow- in the Camshaft Adjustment PinsT40060 must be perpendicular to the center axis of the camshaft.

-- Install the right camshaft chain sprocket with the camshaft timing chain.

Fig 6: Identifying Bolts

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The slots in the camshaft chain sprocket must be at the middle position in relation to the threaded holes in the camshaft.

-- Next, loosely install two bolts -1- for the camshaft chain sprocket.

It still must be possible to rotate the camshaft chain sprocket on the camshaft and it must not tip.

-- Secure the right camshaft using the Camshaft Adjustment PinsT40060.

The bolt -arrow- in the Camshaft Adjustment PinsT40060 must be perpendicular to the center axis of the camshaft.

-- Remove the Chain Tensioner Mounting BracketT40246.

Fig 7: Identifying Bolts

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-- Have a second technician tension the right camshaft chain sprocket clockwise -arrow- with the Chain Sprocket TensionerT40062 and the torque wrench to 20 Nm and maintain the pretension.

Fig 8: Identifying Bolts And Chain Sprocket Tensioner T40062

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-- Tighten the bolts -1 and 2- to the right camshaft chain sprocket.

-- Continue to maintain the pretension and tighten the bolts -1- to the left camshaft chain sprocket.

Fig 9: Identifying Bolts

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-- Remove Chain Sprocket TensionerT40062 and Camshaft Adjustment PinsT40060.

-- Tighten the remaining bolts for the left and right camshaft chain sprocket.

-- Remove the Crankshaft Holder3242.

Fig 10: Identifying Crankshaft Holder 3242

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Checking the Valve Timing

-- Join the tools as illustrated.

Fig 11: Crankshaft Turning Tool, Wrench - 21 MM And Adapter

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Socket 21 mm for ¹ /₂ "-drive

Fig 12: Identifying Wrench - 21 MM T40263

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CAUTION:

Components could be damaged by the camshaft timing chain jumping off.

Turn crankshaft only in direction of engine rotation -arrow-.

-- Turn the crankshaft two turns until the crankshaft is just in front of "Top Dead Center (TDC)".

-- Lock the crankshaft -1- from turning using the Crankshaft Holder3242 to 20 Nm.

Fig 13: Identifying Crankshaft Holder 3242

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CAUTION:

An inaccurate "TDC" setting will cause an inaccurate setting.

If the crankshaft was turned past "TDC" : Turn the crankshaft again two turns until it is just in front of "TDC". Then use the Crankshaft Holder3242 to keep crankshaft from turning.

-- Check whether camshafts of both cylinder heads stand in "TDC" position.

Fig 14: Identifying Bolt In Camshaft Adjustment Pins T40060

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It must be possible to secure the camshafts with the Camshaft Adjustment PinsT40060.
The bolt -arrow- in the Camshaft Adjustment PinsT40060 must be perpendicular to the center line of the camshaft on cylinder bank 1 (right).

The bolt -arrow- in the Camshaft Adjustment PinsT40060 must be perpendicular to the center line of the camshaft on cylinder bank 2 (left).

Fig 15: Identifying Bolt In Camshaft Adjustment Pins T40060
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Correcting the Valve Timing

Fig 16: Camshaft Sprocket Bolts (Left Cylinder Head)

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-- If one of the camshafts does not lock, loosen all the bolts -arrows- for that particular camshaft chain sprocket about 1 turn.

-- Mount the Camshaft Correction ToolT40061 over the bolt heads.

Fig 17: Identifying Camshaft Correction Tool T40061

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-- Turn the camshaft by the Camshaft Correction ToolT40061 just a little back and forth until it is possible to insert the Camshaft Adjustment PinsT40060.

The bolt -arrow- in the Camshaft Adjustment PinsT40060 must be perpendicular to the center axis of the camshaft.

Fig 18: Identifying Bolt In Camshaft Adjustment Pins T40060
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-- Tighten the bolts for the camshaft chain sprocket with the Camshaft Correction ToolT40061 and the Camshaft Adjustment PinsT40060 still attached to approximately 5 Nm.

-- Remove the Camshaft Adjustment PinsT40060 and the Camshaft Correction ToolT40061.

-- Tighten the camshaft chain sprocket bolts to final torque.

-- Repeat the procedure on the other cylinder bank if necessary.

-- Remove the Crankshaft Holder3242.

-- Check the valve timing once again. Refer to Installing .

The rest of the installation is performed in reverse order of removal, noting the following:

-- Tighten the bolt for the "TDC" marking in the oil pan upper section. Refer to OVERVIEW - OIL PAN UPPER SECTION .

-- Install the upper timing chain covers. Refer to TIMING CHAIN GUARD UPPER SECTION, REMOVING AND INSTALLING .