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Home >> Audi >> 2021 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 491 (Cylinder Head, VALVETRAIN (Servicing 8-Cylinder 4.0L 4V TFSI Engine Ea825)) >> 15 Cylinder Head, VALVETRAIN >> Chain Drive >> Camshaft Timing Chain, Removing From Camshafts >> Camshaft Timing Chain, Removing From Camshafts, Cylinder Bank 1 (Right) >> Notes

Camshaft Timing Chain, Removing From Camshafts, Cylinder Bank 1 (Right): Notes

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For the following procedure the camshaft timing chain remains on the engine.

Special tools and workshop equipment required 

Camshaft Locking Device:T40331  , Preparing

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-- Tighten the bolts hand-tight.

Removing

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.

Preliminary work may be required depending on the model. Refer to CAMSHAFT TIMING CHAIN, REMOVING FROM CAMSHAFTS .

-- Remove the cylinder bank 1 upper timing chain cover. Refer to UPPER TIMING CHAIN COVERS, REMOVING AND INSTALLING .

-- Remove the right lower air duct pipe on the turbocharger. Refer to AIR DUCT PIPE, REMOVING AND INSTALLING .

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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".

-- 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.

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-- Repeat the procedure on the intake camshaft plugs.

-- Tighten the Adapter :T40331/2  on the camshaft housing to 9 Nm.

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-- Insert the prepared Camshaft Positioning Tool :T40331/1  all the way in the camshafts. If necessary slightly turn the crankshaft.

-- 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, position the Socket :VAS 261 001  on the corresponding camshaft adjuster using the Counterholder:T90001  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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-- Push back the pistons of the chain tensioner -2- using a screwdriver -1- all the way back -arrow- and lock the chain tensioner 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.

GWWA15-11990Courtesy of AUDI OF AMERICA, LLC