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11 31 032 Removing and Installing/Replacing Left Inlet Camshaft (N63)

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Special Tools Required: 

IMPORTANT: The Intake Camshaft Must First Be Rotated In Such A Way That The Camshaft Is Free From Tension When The Bearing Caps Are Released (Risk of Damage). 

Necessary Preliminary Tasks: 

IMPORTANT: No Cam On The Inlet Camshaft Is Permitted To Press Directly Onto A Roller Cam Follower.
with Cylinder No. 1 At 150° Before TDC Firing Position  There Is No Piston In The TDC Position.

Rotate Left Inlet Camshaft At Dihedron with A Fork Wrench (1) Into A Suitable Position.

Fig 1: Rotating Camshafts Carefully Against Direction of Rotation
G09874314Courtesy of BMW OF NORTH AMERICA, INC.

Release Bolts of Camshaft Bearings In Sequence (10 To 1) In 1/2 Turns.

Set Down All Bearing Caps In A Tidy and Orderly Fashion On Special Tool 11 4 480 .

Intake Camshaft

Fig 2: Left Intake Camshaft Bearing Cap Bolts Tightening/Loosening Sequence (N63)
G09874315Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Used Rocker Arms (1) May Only Be Reused In The Same Position.
NOTE: Rocker Arms (1) Are Freely Accessible After Inlet Camshaft Has Been Removed.

Do "Not" Remove Rocker Arm (1) On Intake Side.

Fig 3: Identifying Rocker Arms
G09874316Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Plain Rectangular Compression Rings (1) Can Easily Break.

If Necessary, Replace Plain Compression Rings (1).

Press Plain Rectangular Compression Ring (1) On One Side Into Groove, Pull Up On Other Side and Unhook Latch Mechanism.

Carefully Pull Plain Rectangular Compression Ring (1) Apart and Remove Towards Front.

Ends of Plain Rectangular Compression Rings (1) Point Upwards.

Make Sure Plain Rectangular Compression Rings (1) Are Engaged At Ends.

Fig 4: Locating Plain Rectangular Compression Rings
G09874317Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: The Intake Camshaft of Cylinder Bank 5 To 8 Is Marked with "E 5-8".
Fig 5: Locating Markings On Intake Camshafts
G09874318Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Rocker Arms (1) 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 6: Identifying Rocker Arms
G09874319Courtesy of BMW OF NORTH AMERICA, INC.

Coat All Bearing Positions with Engine Oil.

Insert Intake Camshaft.

Fig 7: Locating Bearing Positions
G09874320Courtesy of BMW OF NORTH AMERICA, INC.

Insert Inlet Camshaft (1) So That Cams Point To Side At Cylinder 5 As Shown In Picture.

Fig 8: Positioning Cams of Inlet Camshaft At Cylinder 5
G09874321Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Do Not Mix Up The Bearing Caps of Cylinders 1 To 4 and 5 To 8.
All Bearing Caps Are Coded and Can Only Be Installed In One Position.

All Bearing Caps Are Marked:

L = Cylinders 1 - 4.

R= Cylinders 5 - 8.

E = Intake Side

A = Exhaust Side

1 = Designation From 1 To 5

Fig 9: Locating Marks On Bearing Caps
G09874322Courtesy of BMW OF NORTH AMERICA, INC.

Insert All Bolts.

Tighten Down Bolts In Sequence (1 To 10) In 1/2 Turns.

Tightening torque: 11 31 6 AZ .

Tightening torque: 11 31 7 AZ .

Fig 10: Left Intake Camshaft Bearing Cap Bolts Tightening/Loosening Sequence (N63)
G09874323Courtesy of BMW OF NORTH AMERICA, INC.

Install INLET ADJUSTMENT UNITS .

Adjust VALVE TIMING .

Assemble Engine.

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