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Home >> BMW >> 2009 >> X5 35d >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine - Repair (N52)) >> Camshaft >> 11 31 051 Replacing timing chain (N52K)

11 31 051 Replacing timing chain (N52K)

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

Special tools required: 

Necessary preliminary tasks: 

Remove fastener (1) in direction of arrow.

Installation: 

Install fastener (1) with bore facing outwards.

Fig 1: 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 special tool bore 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.

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

Fig 2: Securing Crankshaft Using Special Tool (11 0 300)
G04751153Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Do not remove special tool 11 0 300  to release central bolt (1).
Employ a second  person for gripping when releasing central bolt (1).

Screw special tool 11 9 280  onto hub of vibration damper.

Release central bolt (1).

Tightening torque: 11 21 1AZ, see 11 21 CRANKSHAFT AND BEARINGS .

Remove hub towards front.

Fig 3: Central Bolt With Special Tool (11 9 280)
G04751179Courtesy of BMW OF NORTH AMERICA, INC.

Open plug (1).

Tightening torque: 11 31 7AZ, see 11 31 CAMSHAFT .

Fig 4: Plug
G04787034Courtesy of BMW OF NORTH AMERICA, INC.

Open plug (1).

Tightening torque: 11 11 7AZ, see 11 11 CRANKCASE .

Installation: 

Replace aluminum screws. 

Fig 5: Plug
G04787035Courtesy of BMW OF NORTH AMERICA, INC.

Release bearing pin (1) from timing chain module on cylinder head.

Tightening torque: 11 31 5AZ, see 11 31 CAMSHAFT .

Fig 6: Bearing Pin
G04787036Courtesy of BMW OF NORTH AMERICA, INC.

Release bearing pin (1) from timing chain module on crankcase.

Tightening torque: 11 31 4AZ, see 11 31 CAMSHAFT .

Fig 7: Bearing Pin
G04787037Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Install special tool 11 4 280  to release the central bolts on the inlet and exhaust adjustment units.

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

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

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

Do not remove special tool 11 4 280  .

Fig 8: Cylinder Head Bolts And Special Tools (11 4 282) And (11 4 281)
G04751157Courtesy of BMW OF NORTH AMERICA, INC.

Remove inlet and exhaust adjustment unit.

Release bolts (1) from timing chain module on cylinder head.

Tightening torque: 11 31 3AZ, see 11 31 CAMSHAFT .

Remove chain module with timing chain and sprocket wheel upwards in direction of arrow.

Fig 9: Removing Timing Chain Module Bolts
G04751185Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Note installation direction of sprocket wheel (2).
Collar (see arrow) on sprocket wheel (2) points to engine  .
Incorrect assembly will result in engine damage  .
Fig 10: Collar On Sprocket Wheel
G04751186Courtesy of BMW OF NORTH AMERICA, INC.

Pull timing chain (1) upwards until sprocket wheel (2) engages chain guide (3).

Install timing chain (1) and sprocket wheel (2) in this position.

Installation: 

Always hold timing chain (1) under tension. Timing chain (1) may jam on chain guide (3).

Fig 11: Timing Chain, Sprocket Wheel And Chain Guide
G04751187Courtesy of BMW OF NORTH AMERICA, INC.

Install hub with central bolt.

Tighten down special tool 11 5 200  with screws (1) to hub.

Fig 12: Screws With Special Tool (11 5 200)
G04751188Courtesy of BMW OF NORTH AMERICA, INC.

Remove tensioner for drive belt.

Screw in special tool 11 4 362  from special tool kit 11 4 360  .

Mount special tool 11 9 280  on 11 5 200  .

Support special tool 11 9 280  on special tool 11 4 362  .

Special tool 11 0 300  secures crankshaft.

Tighten central bolt to jointing torque.

Tightening torque: 11 21 1AZ, see 11 21 CRANKSHAFT AND BEARINGS .

Mark central bolt and hub with paint.

Fig 13: Special Tools (11 9 280), (11 0 300), (11 4 360) And (11 5 200)
G04751189Courtesy of BMW OF NORTH AMERICA, INC.

Mark special tools with colored line (1).

See picture.

IMPORTANT: Do not  remove the special tool while tightening the central bolt to torsion angle.
Risk of damage! 

If necessary, tighten central bolt to torsion angle with special tool 00 9 140  .

Tightening torque: 11 21 1AZ, see 11 21 CRANKSHAFT AND BEARINGS .

Fig 14: Marking Special Tools With Colored Line
G04751190Courtesy of BMW OF NORTH AMERICA, INC.

Tighten central bolt with a second person helping.

Tightening torque: 11 21 1AZ, see 11 21 CRANKSHAFT AND BEARINGS .

Install inlet and exhaust adjustment units.

Install chain tensioner, see 11 31 090 Installing and removing/replacing chain tensioner piston (N52K) .

Fig 15: Special Tools (11 9 280), (11 0 300), (11 4 360) And (11 5 200)
G04751189Courtesy of BMW OF NORTH AMERICA, INC.

Crank engine twice.

Check timing, see 11 31 005 Checking timing of camshaft(s) (N52K) .

If necessary, adjust valve timing, see 11 31 505 Adjusting timing of camshaft(s) (N52K) .

Assemble engine.

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