Camshaft Timing Chain, Removing And Installing, Engine With Two Camshaft Adjusters: Removing

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

-- Remove the noise insulation. Refer to OVERVIEW - NOISE INSULATION .

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

• 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

  Courtesy of AUDI OF AMERICA, LLC

-- 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.

-- Remove the bolts -arrows-.

• Carefully remove the bearing mount, without tilting.

-- Remove the bearing mount.

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

TIP:

Depending on the version the mark -arrow- is not present. It is enough that the marks -1- point upward.

• 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.

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.

-- Remove the lower timing chain cover. Refer to LOWER TIMING CHAIN COVER, REPLACING .

-- Check the "TDC point" again.

-- Press the oil pump chain tensioner bracket in the direction of -arrow- and lock it place with the Locking Pin: T40011  .

Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolt -1- and the chain tensioner -2-.

-- Remove the bolts -arrows-.

-- Install the Chain Tensioner Lever: T40243  on the cylinder head -lower arrows-.

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

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

• This will push back the chain tensioner.

TIP:

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

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

-- 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-.

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

• The help of a second technician is necessary for the following step.

-- Hold the exhaust camshaft with the Adapter: T40266  in the direction of -arrow A-. Remove the bolt -1- and guide the tensioning rail -2- downward.

-- Turn the exhaust camshaft clockwise in the direction of -arrow A- until the Camshaft Lock: T40271/1  can be pushed in the direction of -arrow B- into the chain sprocket splines -C-.

-- Remove the guide rail -1- by unlocking the latch -arrow- with a screwdriver and pushing the guide rail forward.

-- Remove the bolts -arrows- and remove the chain tensioner -1-.

-- Remove the bolts -1- and remove the guide rail -2-.

-- Remove the camshaft timing chain from the camshaft sprockets and hang it on the camshaft pins -arrows-.

-- Remove the chain tensioner -1- for the balance shaft timing chain.

-- Remove the bolts -1-. Remove the tensioning rail -2- and the guide rails -3 and 4-.

-- Loosen the adjusting bolt -A- and remove the tensioning pin -B-.

-- Remove the oil pump drive timing chain to remove the three stage chain sprocket.

-- Remove the camshaft timing chain and drive chain for the balance shaft.