Camshaft Timing Chain, Removing From Camshafts, Cylinder Bank 2 (Left): Removing

There are required preliminary procedures if the camshaft timing chain should be removed from the camshafts when the engine is installed. Refer to CAMSHAFT TIMING CHAIN, REMOVING FROM CAMSHAFTS .

CAUTION:

Risk of destroying the engine by adjusting the valve timing.

- Never turn the crankshaft and camshafts if the chain drive is not completely installed.

-- Remove the cylinder bank 2 upper timing chain cover. Refer to UPPER TIMING CHAIN COVERS, REMOVING AND INSTALLING .

-- Remove the vacuum pump. Refer to VACUUM PUMP, REMOVING AND INSTALLING (4M) , VACUUM PUMP, REMOVING AND INSTALLING (4MN) .

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CAUTION:

Risk of damaging the engine by the timing mechanism skipping.

- Only let the engine turn in the direction of engine rotation.

-- Using the Wrench - 21mm:T40263 and Adapter:T40314 , turn the crankshaft -arrow- until the vibration damper is at "TDC".

The marks -1 and 2- on the camshaft adjusters must align with the corresponding locating tabs -arrows- on the camshaft housing. If necessary turn the crankshaft an additional turn.

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-- Pierce the exhaust camshaft plug -2- in the center with a screwdriver -1- -arrow- and carefully lift, at the same time do not damage the sealing surface. (Shown on the cylinder head bank 1).

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-- Tighten the Adapter :T40331/3 on the camshaft housing to 9 Nm.

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It must be easy to insert the Camshaft Lock :T40331/1 .

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Do not use a hammer to install the camshaft positioning tool.

-- Insert the prepared Camshaft Positioning Tool :T40331/1 all the way in the camshafts.

CAUTION:

The camshaft positioning tool T40331/6 cannot be inserted in the camshaft.

- Position the intake camshaft with a second technician using the Torque Wrench Insert - Ring Tool Attachment AF41:VAS 261 001 and Counterholder:T90001 on the camshaft adjusters.

The Camshaft Positioning Tool :T40331/6 engages as shown in the flattened section -2- on the intake camshaft.
The Camshaft Positioning Tool :T40331/7 engages as shown in the flattened section -1- on the exhaust camshaft.

-- Tighten the bolts -arrows- to 9 Nm.

TIP:

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The Counter Holder:T90001 can only be inserted in one position

CAUTION:

There is a risk of damaging the camshaft if handled incorrectly.

- Never use the camshaft positioning tool as a counterholder.

-- To counterhold on the affected camshaft adjuster, position the Counterholder:T90001 with Socket :VAS 261 001 , and loosen the control valve -1- with the Socket E24:T90000 .

-- For reinstallation mark the camshaft adjuster to the camshafts using paint.

Procedures, where the engine is NOT removed:

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-- Insert the Locking Pin:T10492 on the groove -1- in the vibration damper all the way in the hole -arrow- in the belt pulley side sealing flange. If necessary push the crankshaft slightly back and forth.

Procedure, if the engine is removed due to preliminary work.

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-- Remove the plug.

-- Install the Crankshaft Locking Pin:T40069 in the hole and tighten to 20 Nm. If necessary push the crankshaft slightly back and forth.

Continuation:

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-- Turn back the guide rail -2- -arrow- and pistons from the chain tensioner -1- using the Locking Pins:T03006 .

TIP:

The piston is lubricated with oil and can only be pushed back slowly by applying constant pressure.

-- Remove the control valves -1 and 2- and remove both camshaft adjusters.

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