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Home >> BMW >> 2006 >> X3 Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Repair (M54) >> Camshaft >> 11 31 505 Adjusting camshaft timing (M52TU / M54 / M56) >> X3 only:

X3 only:

Secure crankshaft with special tool 11 5 180 in TDC position of 1st cylinder.

IMPORTANT: Do not turn the engine back.

Remove special tools 11 2 300 / 11 5 180 before starting engine.

Unscrew studs.

Fig 1: Unscrewing Studs
G03310388Courtesy of BMW OF NORTH AMERICA, INC.

Remove double VANOS adjustment unit. Refer to 11 36 010 REMOVING AND INSTALLING OR REPLACING DOUBLE VANOS ADJUSTMENT UNIT (M52TU / M54 / M56) .

Press down top of chain tensioner and lock off with special tool 11 3 292.

Fig 2: Locking Off Chain Tensioner
G03310389Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Cylinder for chain tensioning piston is under spring pressure.

Remove cylinder for chain tensioning piston.

Fig 3: Removing Cylinder Chain Tensioning Piston
G03310390Courtesy of BMW OF NORTH AMERICA, INC.

Install special tool 11 4 220.

Fig 4: Fitting Adjusting Screw To Bow Cover
G03310391Courtesy of BMW OF NORTH AMERICA, INC.

Fit adjusting screw to bow cover.

Release screws (1) by half a turn.

Fig 5: Releasing Screws
G03310392Courtesy of BMW OF NORTH AMERICA, INC.

Release nuts (2) by two turns.

Fig 6: Releasing Nuts
G03310393Courtesy of BMW OF NORTH AMERICA, INC.

Release nuts (3) by one turn.

IMPORTANT: Toothed shaft (4) slips very easily from splines.

Pull out toothed shaft (4) until approx. 1 mm of splines can be seen.

Fig 7: Pulling Out Toothed Shaft
G03310394Courtesy of BMW OF NORTH AMERICA, INC.

Withdraw toothed shaft (5) up to stop.

Fig 8: Removing Toothed Shaft Up To Stop
G03310395Courtesy of BMW OF NORTH AMERICA, INC.

Fit special tool 11 3 240 to camshafts on cylinder 6. Align camshafts so that special tool 11 3 240 rests without gaps on cylinder head.

Fig 9: Fitting Special Tool To Camshafts
G03310396Courtesy of BMW OF NORTH AMERICA, INC.

Attach special tool 11 3 244 to special tool 11 3 240 and locate by way of spark plug thread.

Fig 10: Attaching Special Tools
G03310397Courtesy of BMW OF NORTH AMERICA, INC.

Press down chain tensioner at top and remove special tool 11 3 292.

Fig 11: Removing Special Tool
G03310398Courtesy of BMW OF NORTH AMERICA, INC.

Preload tensioning rail with special tool 11 4 220 by rotating adjusting screw with special tool 00 9 250 or standard torque wrench to 0.7 N.m.

Fig 12: Rotating Adjusting Screw With Special Tool
G03310399Courtesy of BMW OF NORTH AMERICA, INC.

Preload cup spring slightly by pressing on sensor gear (1) and tighten nuts by hand.

Fig 13: Preloading Spring
G03310400Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Do not tighten down nuts fully.

Remove gasket.

Fig 14: Checking Dowel Sleeves
G03310401Courtesy of BMW OF NORTH AMERICA, INC.

Check dowel sleeves (1) for damage and correct installation position.

Keep sealing face clean and free of oil.

IMPORTANT: Fit special tool 11 6 150 "without gasket" only. If gasket remains underneath special tool 11 6 150, camshaft timing will be "incorrectly" set.

Attach special tool 11 6 150 "without gasket", tighten nuts by hand and then tighten down uniformly until special tool 11 6 150 is in full contact with cylinder head.

Fig 15: Attaching Special Tool
G03310402Courtesy of BMW OF NORTH AMERICA, INC.

Insert screws (1) on exhaust side and initially tighten to approx. 5 N.m.

Fig 16: Inserting Screws On Exhaust Side
G03310403Courtesy of BMW OF NORTH AMERICA, INC.

Initially tighten nuts (2) on exhaust side and nuts (3) on inlet side to approx. 5 N.m.

Fig 17: Tightening Nuts On Exhaust And Inlet Side
G03310404Courtesy of BMW OF NORTH AMERICA, INC.

Tighten down screws (1) on exhaust side.

Fig 18: Tightening Down Screws On Exhaust Side
G03310405Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 11 31 3AZ. Refer to ENGINE - TIGHTENING TORQUES .

Tighten down nuts (2) on exhaust side and nuts (3) on inlet side.

Fig 19: Tightening Down Nuts On Exhaust And Inlet Side
G03310406Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 11 31 11AZ. Refer to ENGINE - TIGHTENING TORQUES .

Pull special tool 11 2 300/11 5 180 back until flywheel is no longer secured.

Fig 20: Pulling Special Tool Back
G03310407Courtesy of BMW OF NORTH AMERICA, INC.

Remove special tool 11 3 244 and special tool 11 3 240.

Fig 21: Removing Special Tools
G03310408Courtesy of BMW OF NORTH AMERICA, INC.

Crank engine twice in direction of rotation until cam tips on inlet and exhaust camshafts on 1st cylinder face one another.

Fig 22: Identifying Camshafts Position
G03310409Courtesy of BMW OF NORTH AMERICA, INC.

Secure crankshaft in firing TDC position with special tool 11 2 300.

Fig 23: Securing Crankshaft
G03310410Courtesy of BMW OF NORTH AMERICA, INC.

X3 only: 

Secure crankshaft with special tool 11 5 180 in TDC position of 1st cylinder.

IMPORTANT: Do not turn the engine back.

Remove special tools 11 2 300 / 11 5 180 before starting engine.

Fit special tool 11 3 240 to camshafts.

Fig 24: Fitting Special Tool To Camshafts
G03310411Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: The timing is correctly set if the special tool 11 3 240 rests without a gap on the cylinder head or protrudes up to 1 mm to the inlet side.
The timing must be reset if the special tool 11 3 240 protrudes to the exhaust side.
Fig 25: View Of Correct Timing
G03310412Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten and remove special tool 11 4 220.

Fig 26: Removing Special Tool
G03310413Courtesy of BMW OF NORTH AMERICA, INC.

Install cylinder for chain tensioning piston. Refer to 11 31 090 Removing and installing/replacing chain tensioning piston (M52 / M52TU / M54 / M56) .

Fig 27: Installing Cylinder For Chain Tensioning Piston
G03310414Courtesy of BMW OF NORTH AMERICA, INC.

Remove special tool 11 2 300 / 11 5 180.

Fig 28: Removing Special Tool
G03310415Courtesy of BMW OF NORTH AMERICA, INC.

Remove special tool 11 6 150.

Fig 29: Removing Special Tool
G03260662Courtesy of BMW OF NORTH AMERICA, INC.

Install VANOS adjustment unit. Refer to 11 36 010 REMOVING AND INSTALLING OR REPLACING DOUBLE VANOS ADJUSTMENT UNIT (M52TU / M54 / M56) .

Assemble engine.

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