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Home >> Mini >> 2008 >> Cooper S, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Repair - Cooper S (W11 Engine) >> Camshaft >> 11 31 001 Replacing camshaft

11 31 001 Replacing camshaft

Special tools required: 

Necessary preliminary tasks: 

Fit special tool 11 8 370 on cylinder block (1) and fixture of engine mounting (2).

Fig 1: Fitting Special Tool On Cylinder Block
G03309768Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connector of camshaft sensor. Remove retaining screw (1) and camshaft sensor (2).

Fig 2: Removing Camshaft Sensor
G03309769Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Apply a thin coating of clean engine oil to seal.

Tightening torque 13 62 1AZ. Refer to FUEL SYSTEM - TIGHTENING TORQUES .

Rotate crankshaft until triangular adjustment mark (2) on camshaft gear is at 12 o'clock.

Fig 3: Identifying Mark
G03309770Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: For assembly, mark timing chain at triangular adjustment mark (2) with paint (1).

Mark vibration damper and timing case cover with paint.

NOTE: The brass-colored links are of no importance to the timing.

Secure special tool 11 8 250 to camshaft gear.

Fig 4: Securing Special Tool To Camshaft Gear
G03309771Courtesy of BMW OF NORTH AMERICA, INC.

Slacken central bolt (1).

CAUTION: Do not remove central bolt (1) yet.

Make sure that the marking on the camshaft gear and the color marking are aligned.

Fig 5: Aligning Color Markings
G03309772Courtesy of BMW OF NORTH AMERICA, INC.

Remove central bolt.

Tightening torque 11 12 5AZ. Refer to ENGINE - TIGHTENING TORQUES .

Remove all camshaft bearing caps and camshaft.

Fig 6: Removing Camshaft Bearing Caps And Camshaft
G03309773Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Alignment and numbers (1 - 5) of camshaft bearing caps.

Measure cam wear (measurement of non -worn area minus measurement of worn area) and replace camshaft if the result is outside the permitted values.

Cam wear: refer to ENGINE - TECHNICAL DATA .

  1. Non-worn area.
  2. Wear.
  3. Bearing journal.
  4. Cam.
  5. Wear zone.
Fig 7: Identifying Cam Wear
G03309774Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Using a feeler gauge (1), measure the camshaft axial play between camshaft stub (2) and cylinder head (3).

Fig 8: Measuring Camshaft Axial Play
G03309775Courtesy of BMW OF NORTH AMERICA, INC.

Refer to ENGINE - TECHNICAL DATA .

Installation note: 

  1. Lubricate camshaft bearing journals with clean engine oil.
  2. Install camshaft bearing caps in correct installation sequence.
  3. Lubricate rocker arm rolling area with clean engine oil.
CAUTION: If the camshaft is replaced because of cam wear or damage, you must also replace the rocker arms.

Assemble engine.

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