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Home >> BMW >> 2012 >> 335is 2D Coupe >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Engine - Repair - E92 >> Camshaft >> 11 31 505 Adjusting camshaft timing (N55)

11 31 505 Adjusting camshaft timing (N55)

Special tools required: 

IMPORTANT: For the positioning of the special tool 11 4 281 on the mounting flats of the intake camshaft, a collision with the cylinder throttle return spring 1 can occur.
Rework special tool 11 4 281 on the basis of the following DESCRIPTION .

Necessary preliminary tasks 

With 1st cylinder in TDC firing position, cams of intake camshaft (1) at 1st cylinder point upwards at an angle.

Fig 1: Identifying Intake Camshaft
G09845249Courtesy of BMW OF NORTH AMERICA, INC.

With 1st cylinder in TDC firing position, cams of the exhaust camshaft (1) point upwards at an angle.

Fig 2: Identifying Exhaust Camshaft
G09845250Courtesy of BMW OF NORTH AMERICA, INC.

Part numbers (2) on intake and exhaust camshafts (1) point upwards.

Fig 3: Identifying Intake And Exhaust Camshafts Part Numbers
G09845251Courtesy of BMW OF NORTH AMERICA, INC.

Secure special tool 11 4 285 with bolts (1) to cylinder head.

NOTE: Fit special tool 11 4 282 underneath on side of intake camshaft.

Mount reworked special tool 11 4 281 on the intake camshaft.

Mount special tool 11 4 281 on the exhaust camshaft.

Fig 4: Mounting Special Tool (11 4 281) On Camshafts
G09845252Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Only use special tool 11 4 280 to loosen central bolts (1 and 2) of VANOS unit.

Release central bolts (1 and 2).

Fig 5: Identifying VANOS Unit Central Bolts
G09845253Courtesy of BMW OF NORTH AMERICA, INC.

Release CHAIN TENSIONER  (1).

Tightening torque: 11 31 7AZ .

IMPORTANT: Have a cleaning cloth ready. A small quantity of engine oil will emerge after the screw connection has been released.
Make sure no engine oil runs onto belt drive.
Fig 6: Identifying Chain Tensioner
G09845254Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Replace sealing ring.

Turn increment wheel (2) in direction of arrow until retaining pins (1) on special tool 11 4 290 match up.

11 4 290 Slide on special tool in direction of arrow.

Fig 7: Turning Increment Wheel
G09845255Courtesy of BMW OF NORTH AMERICA, INC.

Use bolts to fasten special tool 11 4 290 .

Installation note: 

Replace both central bolts.

Screw in both central bolts.

Release both central bolts 90°.

11 9 340 Screw special tool into cylinder head.

Fig 8: Installing Special Tool Into Cylinder Head
G09845256Courtesy of BMW OF NORTH AMERICA, INC.

Pretension timing chain with special tool 11 9 34000 9 2500, 6 Nm 

Fig 9: Identifying Special Tool (11 9 340) And (00 9 250)
G09845257Courtesy of BMW OF NORTH AMERICA, INC.

Use special tool 00 9 120 to tighten central bolts of intake adjuster.

Tightening torque: 11 36 1AZ .

Fig 10: Tightening Intake Camshaft Adjuster Central Bolts
G09845258Courtesy of BMW OF NORTH AMERICA, INC.

Use special tool 00 9 120 to tighten central bolts of exhaust camshaft adjuster.

Tightening torque: 11 36 1AZ .

Fig 11: Tightening Exhaust Camshaft Adjuster Central Bolts
G09845259Courtesy of BMW OF NORTH AMERICA, INC.

Remove all special tools.

Crank engine on the central bolt twice in the direction of engine rotation and check the TIMING .

Assemble engine.

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