11 31 505 Adjusting camshaft timing (M52TU / M54 / M56)

WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, and 2001 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see SPECIAL TOOLS - X5 (3.0i) .

Special Tools Required:

00 9 250
11 2 300
11 3 240
11 3 244
11 3 292
11 4 220
11 5 180
11 6 150

Before carrying out adjustment work:

Check camshaft timing. Refer to 11 31 005 CHECKING CAMSHAFT TIMING (M52TU / M54 / M56) .

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

Fig 1: Aligning Cam Tips

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Secure crankshaft with special tool 11 2 300 in TDC position of 1st cylinder.

Fig 2: Installing Plug Mandrel

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Important!

Do not turn the engine back.

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

Unscrew studs.

Fig 3: Unscrewing Studs

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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 4: Locking Chain Tensioner With 11 3 292

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Important!

Cylinder for chain tensioning piston is under spring pressure.

Remove cylinder for chain tensioning piston.

Fig 5: Removing Cylinder For Chain Tensioning Piston

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Install special tool 11 4 220 .

Fit adjusting screw to bow cover.

Fig 6: Installing Chain Tensioner

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Release screws (1) by half a turn.

Fig 7: Releasing Screws On Exhaust Side

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Release nuts (2) by two turns.

Release nuts (3) by one turn.

Fig 8: Releasing Nuts On Exhaust And Inlet Side

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Important!

Toothed shaft (4) slips very easily from splines.

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

Fig 9: Aligning Toothed Shaft Splines

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Withdraw toothed shaft (5) up to stop.

Fig 10: Positioning Toothed Shaft Up To Stop

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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 11: Installing Locking Fixture Onto Camshafts

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

Fig 12: Installing Support Bracket 11 3 244

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

Fig 13: Removing Special Tool 11 3 292

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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 14: Preloading Tensioning Rail

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

Important!

Do not tighten down nuts fully.

Fig 15: Preloading Cup Spring

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Remove gasket.

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

Keep sealing face clean and free of oil.

Fig 16: Checking Dowel Sleeves

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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 17: Installing Adjusting Plate On Cylinder Head Without Gasket

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

Fig 18: Tightening Screws On Exhaust Side

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

Fig 19: Tightening Nuts On Exhaust And Inlet Side

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Tighten down screws (1) on exhaust side.

Tightening torque, refer to 11 31 3AZ in ENGINE - TIGHTENING TORQUES .

Fig 20: Tightening Screws On Exhaust Side

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

Tightening torque, refer to 11 31 11AZ in ENGINE - TIGHTENING TORQUES .

Fig 21: Tightening Nuts On Exhaust Side And Inlet Side

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

Fig 22: Releasing Plug Mandrel From Flywheel

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

Fig 23: Removing Locking Fixture

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

Fig 24: Aligning Cam Tips

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

Important!

Do not turn the engine back.

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

Fig 25: Securing Flywheel With Plug Mandrel

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Fit special tool 11 3 240 to camshafts.

Fig 26: Installing Locking Fixture To Camshafts

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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 27: Checking Locking Fixture Alignment On Cylinder Head