Cylinders 1-4

IMPORTANT: Risk of damage!

The exhaust camshaft must first be rotated in such a way that the camshaft is free from tension when the bearing caps are released.

Necessary preliminary tasks:

Remove right high-pressure pump . See 13 51 065 REMOVING AND INSTALLING/REPLACING LEFT HIGH-PRESSURE FUEL PUMP (N63) or 13 51 070 REMOVING AND INSTALLING/REPLACING RIGHT HIGH-PRESSURE FUEL PUMP (N63) .
Remove right cylinder head cover
Remove right exhaust adjustment unit

IMPORTANT: No cam on the exhaust camshaft is permitted to press directly onto a roller cam follower.

With cylinder no. 1 at 150° before firing TDC there is no piston in the TDC position.

Rotate exhaust camshaft (2) at dihedron with a fork wrench into a suitable position.

Fig 1: Rotating Exhaust Camshaft

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NOTE: Inlet camshaft of cylinder bank 5-8 is marked with "E 5-8".

Fig 2: Identifying Camshaft Mark

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Release bolts of camshaft bearings in sequence (10 to 1) in 1/2 turns.

Set all bearing caps down in special tool 11 4 480 in a tidy and orderly fashion.

Remove roller tappet from bearing cap (2 and 3) of high-pressure pump and set down in special tool 11 4 480.

Remove left exhaust camshaft and set down in special tool 11 4 480.

Fig 3: Right Exhaust Camshaft Bearing Cap Bolts Tightening/Loosening Sequence (N63)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Rocker arms (1) of can slip slightly when inlet camshaft is fitted.

Make sure rocker arms (1) are secured as illustrated on hydraulic valve clearance compensating elements and on valves.

Align all rocker arms (1) straight.

Fig 4: Identifying Rocker Arms

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IMPORTANT: Plain compression rings (1) can easily break.

If necessary, replace plain compression rings (1).

Press compression ring (1) on one side into groove, pull up on other side and remove catch.

Carefully pull compression ring (1) apart and remove towards front.

Ends of compression rings (1) point upwards.

Make sure compression rings (1) are engaged at ends.

Fig 5: Pressing Compression Ring On Side Into Groove

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Coat all bearing points with engine oil.

Fig 6: Locating Bearing Points

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Install exhaust camshaft (1).

Turn exhaust camshaft (1) until cams point to side at cylinder no. 1 as shown in graphic.

Fig 7: Identifying Exhaust Camshaft

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IMPORTANT: Do not mix up the bearing caps of cylinders 1-4 and 5-8.

All bearing caps are coded and can only be installed in one position.

Fig 8: Identifying Bearing Caps Mark

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All bearing caps are marked with letters and numbers:

L = cylinder bank 1-4

R= cylinder bank 5-8

E = inlet side

A = exhaust side

1 = Marking, bearing point, from 1 to 5

Insert all bolts.

Tighten down bolts in sequence (1 to 10) in 1/2 turns.

Tightening torque 11 31 6AZ, see 11 31 CAMSHAFT

Tightening torque 11 31 7AZ, see 11 31 CAMSHAFT

Fig 9: Right Exhaust Camshaft Bearing Cap Bolts Tightening/Loosening Sequence (N63)

Courtesy of BMW OF NORTH AMERICA, INC.

Install right inlet and exhaust adjustment units .

Adjust valve timing . See left side and right side .

Assemble engine.