Camshaft Timing Chain, Removing And Installing: Removing

-- Remove the upper timing chain cover. Refer to UPPER TIMING CHAIN COVER, REMOVING AND INSTALLING .

TIP:

The control valves have left-hand thread.

-- Depending on the version, remove the control valve in the direction of -arrow- using either the :T10352A  or :T10352/1A  .

-- To do so counterhold on the vibration damper with the :T40263  , :T40314  and the 24 mm socket.

-- Remove the bolts -arrows-.

• Carefully remove the bearing mount, without tilting.

-- Remove the bearing mount.

-- 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 camshaft chain sprockets must point upward.

TIP: 

The combination of the :T40263  , : T40314  and 24 mm socket are better suited than the :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 in the direction of -arrow- and secure it with a :T40011  .

-- Remove the guide pin -1- and the chain tensioner.

-- Remove the oil pump drive chain.

-- Remove the bolts -arrows-.

Two Different Chain Tensioners May Be Installed Depending on the Version: 

Version 1 

-- Install the :T40243  -arrows-.

-- Lift the chain tensioner locking wedge by inserting a scriber or a suitable screwdriver into the hole of the chain tensioner in the direction of -arrow 1- and hold it there.

-- Slowly press and hold the :T40243  in the direction of -arrow 2-.

-- Secure the chain tensioner using the :T40011  .

Version 2 

-- Install the :T40243  -arrows-.

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

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

-- Secure the chain tensioner with the :T40267  .

All Versions: 

-- Remove the :T40243  .

-- Bolt the :T40271/2  to the cylinder head and push the chain sprocket splines in the direction of -arrow 2-. If necessary, turn the intake camshaft with a wrench in direction of -arrow 1-.

-- Remove the timing chain tensioning rail -2-.

With Wrench Clearance: 

-- Install the :T40271/1  on the cylinder head. Counterhold the camshaft with a wrench in a clockwise direction of -arrow-.

-- Remove the bolt -A- and slide the tensioning rail down. At the same time continue counterholding the camshaft.

-- Turn the exhaust camshaft clockwise in the direction of -arrow- until the :T40271/1  can be slid into the chain sprocket splines.

With Wrench Clearance: 

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

-- Turn the exhaust camshaft in direction of -arrow 1-, slide the :T40271/1  out of the chain sprocket splines in direction of -arrow 2-.

-- Carefully release the camshaft, until the camshaft timing chain is laying on the upper guide rail. Hold the camshaft in this position.

-- Bring the camshaft timing chain tensioning rail into the installation position, and tighten the bolt -A-.

-- Remove the :T40271/1  .

Without Wrench Clearance: 

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

-- Turn the exhaust camshaft with the wrench in the direction of -arrow A- and slide the :T40271/1  into the chain sprocket splines in the direction of -arrow B-.

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

-- Hold the exhaust camshaft securely with the :T10172A  in the direction of the -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 :T40271/1  can be pushed into the chain sprocket splines -arrow C- in the direction of -arrow B-.

All Versions: 

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

-- Remove the bolts -A- and then remove the camshaft timing chain guide rail.

-- Remove the timing chain.