Camshaft, Removing And Installing, Engine Codes CCHHB, CNTA, CXCA, CXDA, CXCB And CXDB: Removing

NOTE:

The sealing surfaces of the lower cylinder head cover and on the upper cylinder head must not be reworked.

The camshaft bearings are integrated in the cylinder head or cylinder head cover. Before removing the cylinder head cover, release the tension on the camshaft timing chain.

When installing, secure all cable ties back to same positions.

-- Remove the air filter housing. Refer to AIR FILTER HOUSING, REMOVING AND INSTALLING .

-- Remove the upper coolant pipe. Refer to UPPER COOLANT PIPES, REMOVING AND INSTALLING .

-- Remove the ignition coils. Refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .

-- Disconnect the connectors:

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For Turbocharger Recirculation Valve -N249-
For Camshaft Position Sensor 3 -G300-
For Fuel Pressure Regulator Valve -N276-

-- Disconnect the connectors -arrows- from the cam adjustment actuator.

-- Remove the bolt -5- and free up the ground cable.

-- Free up the connector from the clip -4- and pivot it forward.

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-- Release the retainers in direction of -arrow-, remove the wiring duct upward from the bracket and move it towards the front.

NOTE:

Risk of destroying the coolant pipes through deformation.

Never change the coolant pipe bent shape.

-- Remove bolts -1, 2 and 3-. Carefully swing coolant line slightly toward the rear.

-- Disconnect the connector -1- from the EVAP Canister Purge Regulator Valve 1 -N80-.

-- Press the release button on the crankcase ventilation hose -2- and remove the hose.

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-- Remove the bolts -arrows- and the crankcase ventilation.

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

-- Remove the vacuum pump. Refer to VACUUM PUMP, REMOVING AND INSTALLING .

-- Support the engine in the installation position. Refer to ENGINE, SUPPORTING IN INSTALLED POSITION .

-- Remove the engine mount. Refer to ENGINE MOUNT, REMOVING AND INSTALLING .

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

-- Remove the right wheel housing liner front section. Refer to WHEEL HOUSING LINER .

-- Remove the engine support. Refer to ENGINE SUPPORT, REMOVING AND INSTALLING .

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

NOTE:

To prevent damage from escaping coolant on the oil pressure switch, cover with a cloth.

-- Turn the vibration damper with the :T10355 to the "TDC point".

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

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

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NOTE:

The control valve has left-hand threads.

Depending on the version, different control valves can be installed. Use a fitting assembly tool -1-.

-- Remove the left and right control valve using the :T10352/2 or :T10352/4 in the direction of -arrow-.

-- Remove the bolts -arrows- and remove the bearing bracket.

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-- Remove the bolts -arrows-.

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-- Install the :T40243 -arrows-.

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-- 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 .

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-- Remove the Chain Tensioner Lever:T40243 .

-- Bolt the Camshaft Lock - Component 2:T40271/2 to the cylinder head and slide into the splines on the chain sprocket in the direction of the -arrow 2-. Rotate the intake camshaft with the Adapter:T40266 -arrows 1- if necessary.

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

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

-- Hold the exhaust camshaft with the :T40266 in the direction of the -arrow A-. Remove the bolt -1- and guide the tensioning rail -2- downward. Turn the camshaft further in a clockwise direction - arrow A- until the :T40271/1 can slide into the chain sprocket splines in direction of -arrow B-.

-- Check the installation position -C- of the :T40271/1 .

-- Remove the guide rail -1-. To do so, release the retainer -arrow- with a screwdriver and push the guide rail off toward the front.

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

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

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

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-- Remove the camshaft timing chain from the camshaft sprockets and guide downward.

-- Install the :T10531/3 . In the "TDC point" the flat area -1- points upward. Install the :T10531/4 . Turn the crankshaft with a 32 mm open end wrench counter-clockwise out of "TDC".

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-- Turn the intake camshaft in the direction of the -arrow 1- using the :T40266 . Slide the :T40271/2 in direction of -arrow 2- out of the chain sprocket splines and bring the camshaft into the rest position.

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-- Turn the exhaust camshaft in the direction of the -arrow 1- using the :T40266 . Slide the :T40271/1 in direction of -arrow 2- out of the chain sprocket splines and bring the camshaft into the rest position.

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

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-- Remove the cylinder head cover.

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