Camshaft, Removing And Installing, Engine With Guide Rail Version 2: Removing

• The cylinder head cover sealing surfaces on the cylinder head must not be worked on.
• The camshaft bearings are integrated in the cylinder head or cylinder head cover. Before removing the cylinder head cover the tension from the camshaft timing chain must be released.
• During installation, all cable ties must be installed at the same location.

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

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

-- Remove the high pressure pump. Refer to HIGH PRESSURE PUMP, REMOVING AND INSTALLING .

-- Remove the vacuum pump. Refer to OVERVIEW - VACUUM PUMP .

• 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 bracket without tilting - risk of damage.

-- Remove the bearing mount.

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.

With Marks in the Cylinder Head Cover 

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

• The notch on the vibration damper must align with the arrow marking on the lower timing chain cover -arrow-.
• The markings -1- on the camshaft chain sprockets must be opposite the markings -2 and 3- on the cylinder head.

Without Marks in the Cylinder Head Cover 

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

• 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.

-- Mark the camshaft timing chain and the cylinder head -arrows- to match the marking on the chain sprockets -1- with a waterproof marker.

-- In addition, mark the camshaft timing chain to the camshaft timing chain guide rail -2- with a waterproof marker.

Continuation for All Engines: 

-- Remove the plug -arrow-.

-- Remove the bolts -arrows-.

-- Remove the bolt -arrow-.

-- Install the Chain Tensioner Lever: T40243  -arrows-.

• A second technician is required for the following steps.

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

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

-- Secure 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-.

-- Remove the bolt -1- and guide the tensioning rail -2- downward.

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

-- Turn the exhaust camshaft with the Adapter: T40266  in the direction of -arrow 1- and slide the Camshaft Lock: T40271/1  into the chain sprocket splines in the direction of -arrow 2-.

-- Mark the camshaft chain sprockets to the Camshaft Locks: T40271/1  and : T40271/2  -arrow-.

-- Remove the upper guide rail -1- by unlocking the catch with a screwdriver and pushing the guide rail forward.

-- Remove the camshaft timing chain from chain sprockets.

-- Turn the vibration damper in the opposite direction of the engine rotation out of "TDC".

-- Use the Adapter: T40266  to turn the intake camshaft in the direction of -arrow 1-, slide the Camshaft Lock: T40271/2  out of the chain sprocket splines in the direction of -arrow 2- and move the camshaft into the resting position.

-- Use the Adapter: T40266  to turn the exhaust camshaft in the direction of -arrow 1-, slide the Camshaft Lock: T40271/1  out of the chain sprocket splines in the direction of -arrow 2- and move the camshaft into the resting position.

-- Remove the cylinder head cover bolts in -1 to 6- sequence.

Courtesy of AUDI OF AMERICA, LLC

-- Pry up the cylinder head cover -2- using a tool for example a screwdriver -1- starting at the chain side.

Courtesy of AUDI OF AMERICA, LLC

-- Guide the cylinder head cover under the permanent ventilation.

-- Remove the camshaft and cover the open engine components.

-- If necessary for continuing work: mark the roller rocker lever and hydraulic lifter for reinstallation, remove them and place on a clean surface.