Camshaft Timing Chain, Removing And Installing: Installing

WARNING: This page is about a different car, the 2016 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

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Secure crankshaft -1- in "TDC" position using :T40237 .

NOTE:

Replace the locking bolt seal for the "TDC" marking.

Replace the bolts that were tightened with an additional turn.

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

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It must be possible to secure the camshafts with the :T40060 .
The bolt -arrow- in the :T40060 must be perpendicular to the center line of the camshaft on cylinder bank 1 (right).

The bolt -arrow- in the :T40060 must be perpendicular to the center line of the camshaft on cylinder bank 2 (left).

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-- Remove the :T40060 from both camshafts.

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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 :T40061 by installing the camshaft chain sprocket on the camshaft.

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

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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 with the :T40060 .

The bolt -arrow- in the :T40060 must be perpendicular to the center axis of the camshaft.

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

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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 right camshaft with the :T40060 .

The bolt -arrow- in the :T40060 must be perpendicular to the center axis of the camshaft.

-- Secure the tensioning rail and the guide pins -2-.

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-- Remove the :T40316 -1- from the securing hole, thereby releasing the chain tensioner.

-- Install the bolt -arrow- for the skip protection.

-- Loosen the bolts -2-.

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-- Stop the balance shaft -3- with the :3359 as shown in the illustration.

NOTE:

Remove the bolts if necessary and move the balance shaft into position.

-- Loosely install the bolts -2-.

It must still be possible to rotate the chain sprocket -1- on the balance shaft and it must not tip.

-- Have a second technician tension the right camshaft chain sprocket clockwise -arrow- with the :T40062 and the torque wrench to 20 Nm and maintain the pretension.

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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- on the left camshaft chain sprocket.

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-- Tighten the bolts -2- for the chain sprocket -1- for the balance shaft -3-.

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-- Remove the :3359 , :T40062 and :T40060 .

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

-- Remove the :3242 .

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Checking Valve Timing

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CAUTION:

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

Only rotate the crankshaft in the direction of engine rotation.

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

-- Lock the crankshaft -1- from turning using the :3242 to 20 Nm.

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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 :3242 to keep crankshaft from turning.

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

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It must be possible to secure the camshafts with the :T40060 .
The bolt -arrow- in the :T40060 must be perpendicular to the center line of the camshaft on cylinder bank 1 (right).

The bolt -arrow- in the :T40060 must be perpendicular to the center line of the camshaft on cylinder bank 2 (left).

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Correcting Valve Timing

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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 :T40061 over the bolt heads.

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-- Turn the camshaft by the :T40061 just a little back and forth until it is possible to insert the :T40060 .

The bolt -arrow- in the :T40060 must be perpendicular to the center axis of the camshaft.

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-- Tighten the bolts for the camshaft chain sprocket with the :T40061 and the :T40060 still attached to approximately 5 Nm.

-- Remove the :T40060 and the :T40061 .

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

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

-- Remove the :3242 .

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

Install in reverse order of removal. Note the following:

-- Install the timing chain cover lower section. Refer to LOWER TIMING CHAIN COVER, REMOVING AND INSTALLING .