11 31 505 Adjusting timing of camshaft(s) (B36A/B38A)

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Special tools required:

2 288 380
0 496 855
2 450 487
2 358 122
11 6 480

Necessary preliminary work:

Remove the CATALYTIC CONVERTER .
Check TIMING .

IMPORTANT:

Risk of damage to engine.

The notes for CHECKING AND ADJUSTING TIMING must be strictly observed!

If the crankshaft is disconnected properly, it is not possible to turn the engine forwards or backwards on the vibration damper!

Vehicles with manual transmission:

Dimension (x) = 56 mm.

Insert the special tool 2 288 380 up to dimension (X) into the dowel hole.

Fig 1: Inserting Special Tool (2 288 380) Into Dowel Hole

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Vehicles with manual transmission:

Special tool 2 288 380 correctly positioned.

The engine is located at the first cylinder at top dead center.

Fig 2: Special Tool (2 288 380) Correct Position

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Vehicles with manual transmission:

Special tool 2 288 380 incorrectly positioned.

The TDC setting of the first cylinder has not been achieved.

Fig 3: Special Tool (2 288 380) Incorrect Position

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Vehicles with automatic transmission:

Dimension (Y) = 66 mm.

Insert the special tool 2 288 380 up to dimension (Y) into the dowel hole.

Fig 4: Inserting Special Tool (2 288 380) Into Dowel Hole

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Vehicles with automatic transmission:

Special tool 2 288 380 correctly positioned.

The engine is located at the first cylinder at top dead center.

Fig 5: Special Tool (2 288 380) Correct Position

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Vehicles with automatic transmission:

Special tool 2 288 380 incorrectly positioned.

The TDC setting of the first cylinder has not been achieved.

Fig 6: Special Tool (2 288 380) Incorrect Position

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Release CHAIN TENSIONER (1).

NOTE: Have a cleaning cloth ready. A small quantity of engine oil will escape after the screw connection has been released.

Installation note:

A new chain tensioner and sealing ring must be installed.

Fig 7: Chain Tensioner

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Version 1:

To remove the central valve (1), use the changeover ratchet (2) from special tool 0 496 855 with special tool 2 450 487.

Fig 8: Releasing Central Valve Using Reversible Ratchet Head

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Version 2:

Use special tool 0 496 855 to remove the central valve (1).

Fig 9: Removing Central Valve Using Special Tool (0 496 855)

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NOTE: If special tool 2 358 122 cannot be mounted, the timing must be readjusted.

Mount gauge (1) from special tool 2 358 122 .

If necessary, turn the crankshaft a little using the special tool 11 6 480 .

Mount the counter support (3) and loosen the VANOS central valve of the intake camshaft with the special tool 0 496 855.

Fig 10: Mounting Gauge And Counter Support

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If necessary, turn the crankshaft a little further using the special tool 11 6 480 .

Mount the counter support (2) and loosen the VANOS central valve of the exhaust camshaft with the special tool 0 496 855.

Turn both camshafts to position.

NOTE: The markings (1) on the intake and exhaust camshafts can be read from above.

Fig 11: Locating Markings On Intake And Exhaust Camshafts

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IMPORTANT:

The special tool can also be fitted if the camshafts are rotated by 180 degrees.

The middle one of the three flat sections (1) on the intake and exhaust camshafts must point upwards.

Fig 12: Locating Flat Sections On Intake And Exhaust Camshafts

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Secure basic carrier (1) by screws (2) on cylinder head.

Position gauge (3) with recess on mounting flats of exhaust camshaft.

Secure basic carrier (3) by screws (5) on basic carrier.

Position gauge (4) with recess on mounting flats of intake camshaft.

Fig 13: Positioning Gauge With Recess On Mounting Flats Of Intake Camshaft

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Secure gauge (4) by screws (5) on basic carrier.

Install new chain tensioner.

Tighten chain tensioner (1).

Tightening torque 11 31 1AZ .

Fig 14: Chain Tensioner

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Tighten VANOS central valve of intake camshaft adjuster (1).

Tightening torque VALVETRONIC .

Fig 15: Tightening VANOS Central Valve Of Intake Camshaft Adjuster

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Tighten VANOS central valve of exhaust camshaft adjuster (1).

Tightening torque 11 36 1AZ .

Remove special tools 2 288 380 and 2 358 122 .

Fig 16: Tightening VANOS Central Valve Of Exhaust Camshaft Adjuster

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Crank engine with special tool 11 6 480 twice in direction of engine rotation.

IMPORTANT: Do not crank engine in reverse direction.

Fig 17: Cranking Engine With Special Tool (11 6 480)

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Required follow-up work:

Check CAMSHAFT TIMING .