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Home >> BMW >> 2011 >> Z4 35is >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine - Repair (N52)) >> 1131 Camshaft >> 11 31 005 Checking timing of camshaft(s) (N52K)

11 31 005 Checking timing of camshaft(s) (N52K)

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks: 

Remove fastener (1) in direction of arrow.

Installation: 

Install fastener (1) with bore facing outwards.

Fig 1: Installing Fastener
G04751152Courtesy of BMW OF NORTH AMERICA, INC.

Rotate crankshaft at central bolt into TDC position.

Slide special tool 11 0 300 in direction of arrow into dowel hole and secure crankshaft.

IMPORTANT: On vehicles with optional extra SA205 (automatic transmission), there is a large bore for the TDC position shortly before the special tool bore. This bore can be confused with the special tool bore.
Fig 2: Rotating Engine Central Bolt Using Special Tool (11 0 300)
G04751153Courtesy of BMW OF NORTH AMERICA, INC.

If the flywheel is secured in the correct dowel hole with special tool 11 0 300 , the engine can no longer be moved at the central bolt.

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

Fig 3: Identifying Camshaft
G04751154Courtesy of BMW OF NORTH AMERICA, INC.

The timings are correct when the part numbers (2) on the inlet and exhaust camshafts (1) point upwards.

Fig 4: Identifying Camshafts With Part Number
G04751155Courtesy of BMW OF NORTH AMERICA, INC.

With 1st cylinder in firing TDC position, cams of exhaust camshaft (3) at 6th cylinder point downwards at an angle.

Cam follower (1) is not actuated.

NOTE: When the engine is installed, the position of the exhaust camshaft (3) for the timing can only be checked with a mirror.
Fig 5: Identifying Exhaust Camshaft And Cam Follower
G04751156Courtesy of BMW OF NORTH AMERICA, INC.

Secure special tool 11 4 283 with bolts (1) to cylinder head.

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

Mount special tool 11 4 281 on intake and exhaust camshafts.

Fig 6: Identifying Cylinder Head Bolts And Special Tools
G04751157Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, adjust VALVE TIMING  .

Assemble engine.