11 31 001 Replacing camshaft

Special tools required: 

• 11 8 250
• 11 8 370

Necessary preliminary tasks: 

• Remove spark plugs. Refer to 12 12 011 REPLACING ALL SPARK PLUGS .
• Remove wheel arch liner. Refer to 51 71 040 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT WHEEL ARCH LINER .
• Remove cylinder head cover. Refer to 11 12 000 Removing and installing, sealing cylinder head cover (COOPER S)  .
• Remove left engine mounting. Refer to 22 11 001 REPLACING RIGHT ENGINE MOUNT .
• Remove hydraulic chain tensioner. Refer to 11 31 091 Removing and installing/replacing hydraulic chain tensioner (COOPER S)  .
• Remove rocker arm shafts. Refer to 11 33 020 Removing and installing or replacing rocker arm shaft  .

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

Fig 1: Fitting Special Tool On Cylinder Block

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

Fig 2: Removing Camshaft Sensor

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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

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Mark vibration damper and timing case cover with paint.

Secure special tool 11 8 250 to camshaft gear.

Fig 4: Securing Special Tool To Camshaft Gear

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Slacken central bolt (1).

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

Fig 5: Aligning Color Markings

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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

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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

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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

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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.

Assemble engine.