11 36 010 Removing and installing or replacing double VANOS adjustment unit (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 3 450
11 4 220
11 6 170

Necessary Preliminary Tasks:

Remove intake filter housing with air-mass flow sensor
Remove fan impeller with fan clutch and fan cowl, refer to 11 52 020 REMOVING AND INSTALLING/REPLACING FAN CLUTCH (S52 / S54 / M52 / M52TU / M54 / M56) .
Remove cylinder head cover, refer to 11 12 000 REMOVING AND INSTALLING, SEALING CYLINDER HEAD COVER (M52TU / M54 / M56) .
Remove spark plugs, refer to 12 12 011 REPLACING ALL SPARK PLUGS .

Removal:

Removal of double VANOS adjustment unit is described separately from installation. Assembly sequence for removal and installation is different.

Detach plastic cover for inlet camshaft.

Fig 1: Detaching Plastic Cover For Camshaft

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Unscrew oil pressure pipe.

Fig 2: Unscrewing Oil Pressure Pipe

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Mount special tool 11 3 450 with banjo bolt of oil pressure line.

Fig 3: Installing Compressed Air Connection On Banjo Bolt

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Important!

Cover double VANOS adjustment unit.

When the compressed air supply is connected, several drops of oil are sprayed out of the bore.

Fig 4: Locating Bore In VANOS Unit

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Connect compressed air (2 to 8 bar).

Fig 5: Connecting Compressed Air To Banjo Bolt

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NOTE: When the engine is switched off, it is possible that the camshafts are not in their initial positions. With the compressed air supply connected, rotate the engine to return the camshafts to their initial positions.

With compressed air supply connected, crank engine at least two revolutions in direction of rotation until cam tips on inlet and exhaust camshafts on 1st cylinder face each other.

Fig 6: Aligning Cam Tips

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Pull dust guard out of the special tool bore.

Fig 7: Removing Dust Guard

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

Important!

Remove special tool 11 2 300 before switching on the engine.

Fig 8: Installing Plug Mandrel

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Automatic Transmissions Only:

Illustration does not show automatic transmission.

Important!

On engines with automatic transmissions, there is shortly before the special tool bore (1) a large bore (2) which can be confused with the special tool bore.

If special tool 11 2 300 is secured in the correct bore (1), the engine can no longer be cranked at the central bolt.

Fig 9: Locating Large Bore And Special Tool Bore

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Unscrew studs.

Fig 10: Unscrewing Studs

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Secure camshafts with special tool 11 3 240 .

Fig 11: Securing Camshafts With Locking Fixture

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Detach compressed air connection.

NOTE: special tool 11 3 450 still remains fitted.

Fig 12: Detaching Compressed Air Connection

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Important!

Oil escapes after screw plugs have been removed. Have cleaning cloths and container ready. Make sure no oil runs onto belt drive. Remove any remnants of oil immediately with cleaning cloth.

Remove screw plugs, catch escaping oil on inlet and exhaust sides.

Fig 13: Catching Escaping Oil On Exhaust Side

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Remove sealing caps with special tool 11 6 170 or with commercially available short flat nose pliers.

Fig 14: Removing Sealing Caps

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IMPORTANT: Left-hand threads.

Release fitting screws on inlet and exhaust sides.

Fig 15: Releasing Fitting Screws On Exhaust And Inlet

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Detach plug connections from camshaft sensor and solenoid valves on exhaust and inlet sides.

Fig 16: Detaching Plug Connections From Camshaft Sensor And Solenoid Valves

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Unscrew suspension eye.

Fig 17: Unscrewing Suspension Eye

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Release nuts and remove double VANOS adjustment unit.

Fig 18: Locating VANOS Unit Retaining Nuts

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Important!

With double VANOS adjustment unit removed:

Do not crank engine.

The toothed shaft on the inlet side may move and slip out of the spline teeth, the inlet camshaft is thus no longer non-positively connected and the valves could rest on the piston.

Installation:

Installation of double VANOS adjustment unit is described separately from removal. Assembly sequence for removal and installation is different.

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

Fig 19: Checking Dowel Sleeves

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Keep sealing faces clean and free of oil. Apply a thin and even coat of sealing compound Drei Bond 1209 to contact surface edges of separating face between cylinder head and double VANOS adjustment unit.

Replace seal.

Install and secure double VANOS adjustment unit.

Fig 20: Installing VANOS Adjustment Unit

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Attach plug connections of camshaft sensor and solenoid valves on exhaust and inlet sides.

Fig 21: Attaching Plug Connections Of Camshaft Sensor And Solenoid Valves

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Important!

Left-hand threads.

Insert fitting screws for hydraulic piston on toothed shaft on inlet and exhaust sides and tighten down.

Tightening torque, (10 N.m.).

Fig 22: Installing Fitting Screws

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Replace sealing caps and install with special tool 11 6 170 or with commercially available short flat nose pliers.

Fig 23: Installing Sealing Caps

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Insert screw plugs with new sealing rings and tighten down.

Tightening torque, (50 N.m.).

Fig 24: Inserting Screw Plugs

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Fit suspension lug.

Fig 25: Installing Inspection Lug

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NOTE: If the double VANOS adjustment unit has been replaced, you must check and, if necessary, adjust the camshaft timing. If work has been carried out which has "no" effect on the timing and it is assured that the timing adjustment is correct, the timing check described in the following does not have to be conducted.

IMPORTANT: Cylinder for chain tensioning piston is under spring pressure.

Remove cylinder for chain tensioning piston.

Fig 26: Locating Cylinder For Tensioning Piston

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Insert special tool 11 4 220 in cylinder head and bring adjustment screw into contact with tensioning rail.

Fig 27: Installing Chain Tensioner

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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 28: Preloading Tensioning Rail

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Pull special tool 11 2 300 back until flywheel is no longer secured in position.

Fig 29: Releasing Flywheel From Plug Mandrel

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Remove special tool 11 3 240.

Fig 30: Removing Locking Fixture

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IMPORTANT: Cover double VANOS adjustment unit; when the compressed air supply is connected, several drops of oil are sprayed out of the bore.

Fig 31: Locating Bore In VANOS Unit

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Connect compressed air (2 to 8 bar).

Fig 32: Connecting Compressed Air To Fitting

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With compressed air supply connected, crank engine twice in direction of rotation until cam tips on inlet and exhaust camshafts on 1st cylinder face each other.

Fig 33: Aligning Cam Tips

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

IMPORTANT: Do not turn the engine back. Remove special tool 11 2 300 before switching on the engine.

Fig 34: Securing Crankshaft With Plug Mandrel

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Check camshaft setting:

Fit special tool 11 3 240 to camshafts.

Fig 35: Installing Locking Fixture On 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.

If necessary, adjust camshaft timing. Refer to 11 31 505 ADJUSTING CAMSHAFT TIMING (M52TU / M54 / M56) .

Fig 36: Checking Locking Fixture Alignment