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.
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) ).
- 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.
- Lock vibration damper in position with counter hold 3406.
- 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.
- 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.
NOTE:
- If the cylinder head is removed:
- Install cylinder head, refer to Cylinder head, removing and installing
- Push sliding rail onto bearing bolt. Insert short mounting screw with locking compound D 000 600 and tighten both bolts to 20 Nm.
- 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.
NOTE:
- Coat contact surfaces of the bolt heads with oil when installing.
- Remove camshaft guide 3268.
- Tighten mounting bolts for camshaft sprockets to 100 Nm.
NOTE:
- Hold camshaft - arrow - only with open-end wrench SW 24. The camshaft guide 3268 must not be inserted when tightening or loosening the sprockets.
- Coat sealing surface of sealing flange with AMV 188 001 02 and install. Tighten mounting bolt to 10 Nm.
- Replace oil seal for sealing flange, refer to Sealing flange and flywheel/drive plate, removing and installing .
- Prepare cylinder head gasket for assembly Preparing cylinder head gasket for installation under Cylinder head, removal and installation overview
- Coat sealing surface of cover piece with AMV 188 001 02 .
- Coat O-ring for oil passage seal and insert in cover piece.
- Install cover piece, insert all mounting bolts and turn in opposite direction slightly.
- Initially tighten 8 mm mounting bolts to 25 Nm, then tighten 6 mm mounting bolts to 10 Nm.
- Install chain tensioner for camshaft roller chain and tighten to 40 Nm.
NOTE:
- Rotate engine only with chain tensioner installed. Otherwise, the camshaft roller chain will skip.
- Rotate crankshaft two turns in direction of rotation of engine and check valve timing, refer to Valve timing, checking .