Work sequence

With engine removed

Install roller chain and chain tensioner with tension bar:

• Set and check position of crankshaft in relation to intermediate shaft.

Fig 1: Roller Chain, Sliding Rail, Sprockets, Chain Tensioner, Drive Gear And Thrust Washer Notches

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Ground tooth of drive gear - B  - must be aligned with bearing parting line (TDC cyl. 1).

• Install bolt without collar for sliding rail - 2  - and tighten to 10 Nm.
• Install sliding rail - 2  - with roller chain - 1  - and both sprockets - 3  - and - 4  - (note direction of travel of roller chain Locking vibration damper in position  under Valve timing, setting (Installing timing chains)  ).

Fig 2: Roller Chain, Sliding Rail, Sprockets, Chain Tensioner, Drive Gear And Thrust Washer Notches

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• Mark on sprocket for roller chain - 4  - must be aligned with notches - C  - or - D  - on thrust washer.
• Release stop teeth in chain tensioner with a small screwdriver - A  -.
• Press tension bar against chain tensioner and tighten chain tensioner to 10 Nm.

Fig 3: Vibration Damper Locked In Position With Counter Hold 3406

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• Lock vibration damper in position with counter hold 3406.

Fig 4: Roller Chain, Sliding Rail, Sprockets, Chain Tensioner, Drive Gear And Thrust Washer Notches

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• Tighten sprockets 3 and 4 for intermediate shaft to 100 Nm.
• Remove counter hold 3406.
• Check position of crankshaft in relation to intermediate shaft.

Ground tooth of drive gear - B  - must be aligned with bearing parting line (TDC cyl. 1).

Install camshaft roller chain and chain tensioner with tension bar:

• Set both camshafts to TDC cyl. 1.

Fig 5: Camshaft Guide 3268 Insert Into Shaft Slot

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• Align camshafts with camshaft guide 3268.
• Install bearing bolt for tension bar and tighten to 18 Nm.
• Install tension bar for chain tensioner (camshaft roller chain).
• Install bearing bolt with collar for sliding rail and tighten to 10 Nm.

• Push sliding rail onto bearing bolt. Insert short mounting screw with locking compound D 000 600  and tighten both bolts to 20 Nm.

Fig 6: Marking roller chains

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• Place camshaft roller chain on intermediate shaft (note direction of travel).
• Mount camshaft sprocket and roller chain on camshaft for cylinder bank 1, 3 and 5 (long camshaft) and counter tighten by hand.
• Mount camshaft sprocket (with pickup wheel for Hall generator) and camshaft roller chain to camshaft for cylinder bank 2, 4, and 6 and tighten by hand.

• Remove camshaft guide 3268.
• Tighten mounting bolts for camshaft sprockets to 100 Nm.

Fig 7: Identifying Camshaft Installed

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