Camshafts, Installing

-- If the crankshaft was turned in the meantime, bring the piston for cylinder 1 to TDC and then turn the crankshaft back again slightly.

-- Remove any sealant residue from the groove on the cylinder head cover as well as on the sealing surfaces.

-- Clean the sealing surfaces. They must be free of oil and grease.

-- Lubricate the running surfaces of both camshafts.

-- Place the intake camshaft -A- in the cylinder head. Turn the cam lobes of cylinder 4 -arrows- upward.

Fig 1: Identifying Intake Camshaft And And Cylinder Head

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-- Check if the valve lifters for the cam adjustment actuators are retracted.

Fig 2: Bring the Cam Adjustment Actuators into the Installed Position

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-- Place the exhaust camshaft in the cylinder head cover as shown. The cam pair -A- and -B- must be pushed together.

Fig 3: Placing Exhaust Camshaft In Cylinder Head Cover

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-- Turn the exhaust camshaft until the markings -A- and -B- align.

Fig 4: Locating Alignment Marks

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-- Apply the sealant on the clean sealing surface of the cylinder head cover as shown -arrows-.

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• Sealant bead thickness: 1.5 to 2.5 mm

-- Secure the camshaft and place the cylinder head cover with the camshaft on the cylinder head.

-- Lightly push on the cylinder head cover by hand and while doing so turn the camshaft slightly until the cylinder head cover lays >>free of tension<< on the cylinder head.

Fig 5: Turning Camshafts

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-- Replace the cylinder head cover bolts.

-- Tighten the bolts in several steps. Refer to Figure for the tightening sequence.

-- Turn the intake camshaft with the Adapter:T40266  in the direction of the -arrow A- until the marks -1- and -2- align. Push the Camshaft Lock:T40271/2  in the chain sprocket splines -B-.

Fig 6: Identifying Intake Camshaft With Adapter T40266

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-- Turn the exhaust camshaft with the Adapter:T40266  in the direction of the -arrow A- until the marks -1- and -2- align. Slide the Camshaft Lock:T40271/1  into the chain sprocket splines -B-. The marking -2- is offset slightly to the right.

Fig 7: Turning Exhaust Camshaft W/ T40266

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-- Turn the crankshaft on the hex fitting to the "TDC point". In the "TDC point" the flat area -1- is upward.

Fig 8: Identifying Assembly Tool - Turning Over Tool T10531/3

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