11 31 025 Removing and installing/replacing intake camshaft (B48/B46)

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Special tools required:

11 4 480

Necessary preliminary tasks:

NOTE: The bearing caps are legibly labelled with (E1 - E4) on the intake side.
Bearing cap (E) is a thrust bearing.

Fig 1: Bearing Caps

G11645100

Courtesy of BMW OF NORTH AMERICA, INC.

Release all screws on bearing caps in the sequence 10 - 1 in 1/2 turns.

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

Fig 2: Intake Camshaft Bearing Cap Screws Loosening/Tightening Sequence

G11645101

Courtesy of BMW OF NORTH AMERICA, INC.

Take intake camshaft (1) out of cylinder head.

Fig 3: Removing Intake Camshaft From Cylinder Head

G11645102

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Moisten all bearing positions (1) with engine oil.

Fig 4: Bearing Positions

G11645103

Courtesy of BMW OF NORTH AMERICA, INC.

Engage intake camshaft in cylinder head so that data code (1) is pointing upwards.

Fig 5: Data Code

G11645104

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check adapter sleeves (1) for damage and firm seating.

Fig 6: Adapter Sleeves

G11645105

Courtesy of BMW OF NORTH AMERICA, INC.

Coat intake camshaft and bearing shells with engine oil.

Position all bearing shells on cylinder head.

NOTE: The bearing caps are legibly labelled with (E1 - E4) on the intake side.
Bearing cap (E) is a thrust bearing.

Fig 7: Bearing Caps

G11645100

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten all screws in the sequence 1 - 10 in 1/2 turns.

Tightening torque 11 31 1AZ .

Fig 8: Intake Camshaft Bearing Cap Screws Loosening/Tightening Sequence

G11645101

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Check TIMING