11 36 010 Removing and installing or replacing double VANOS adjustment unit (M52TU / M54 / M56)

WARNING: This page is about a different car, the 2002 BMW Z3 and 2001 BMW Z3. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see SPECIAL TOOLS - Z3 .

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 Inlet Camshaft

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Unscrew oil pressure pipe.

Fig 2: Locating Oil Pressure Pipe

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

Fig 3: Mounting Special Tool 11 3 450 On Oil Pressure Line

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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: View Of Double VANOS Adjustment Unit Bore

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Connect compressed air (2 to 8 bar).

Fig 5: Connecting Compressed Air To Oil Pressure Pipe

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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: Identifying Position Of Cam Tips

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Pull dust guard out of the special tool bore.

Fig 7: Pulling Dust Guard Out Of Special Tool Bore

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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: Securing Crankshaft In Firing TDC Position With Special Tool 11 2 300

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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: Identifying Special Tool Bore And Large 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 Special Tool 11 3 240

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Detach compressed air connection.

NOTE: Special tool 11 3 450 still remains fitted.

Fig 12: Detaching Compressed Air Connection From Oil Pressure Pipe

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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: View Of Screw Plugs In Sealing Caps

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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 With Special Tool 11 6 170

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Important!

Left-hand threads.

Release fitting screws on inlet and exhaust sides.

Fig 15: Releasing Fitting Screws On Inlet And Exhaust Sides

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

Fig 18: Removing Double VANOS Adjustment Unit

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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 For Damage

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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: Securing Double 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, refer to 11 36 4AZ in VARIABLE CAMSHAFT TIMING .

Fig 22: Inserting Fitting Screws For Hydraulic Piston On Toothed Shaft

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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: Replacing Sealing Caps With Special Tool 11 6 170

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Insert screw plugs with new sealing rings and tighten down.

Tightening torque, refer to 11 36 3AZ in VARIABLE CAMSHAFT TIMING .

Fig 24: Inserting Screw Plugs With Sealing Rings

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Fit suspension lug.

Fig 25: Fitting Suspension 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. Refer to 11 31 090 REMOVING AND INSTALLING/REPLACING CHAIN TENSIONING PISTON (M52 / M52TU / M54 / M56) .

Fig 26: Removing Cylinder For Chain 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: Inserting Special Tool 11 4 220 In Cylinder Head

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

Fig 28: Preloading Tensioning Rail With Special Tool 11 4 220

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

Fig 29: Pulling Special Tool 11 2 300 Back On Flywheel

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Remove special tool 11 3 240.

Fig 30: Removing Special Tool 11 3 240

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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: Covering Double VANOS Adjustment Unit Bore

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Connect compressed air (2 to 8 bar).

Fig 32: Connecting Compressed Air To Oil Pressure Pipe

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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: Identifying Position Of 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 Special Tool 11 2 300 In TDC Position

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Check camshaft setting:

Fit special tool 11 3 240 to camshafts.

Fig 35: Fitting Special Tool 11 3 240 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.

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

Fig 36: Identifying Correct Fitting Of Special Tool 11 3 240 To Camshafts