Adjust the timing of the camshaft

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Preliminary work

Refer to REMOVING THE HOLDER OF THE POSITIVE BATTERY CABLE .
Refer to REMOVING LAMBDA OXYGEN SENSOR FOR THE CYLINDERS 4 TO 6 .
Refer to BLOCKING THE CRANKSHAFT IN THE TDC FIRING POSITION OF CYLINDER 1 .
Refer to REMOVING CHAIN TENSIONER .

Precondition

Crankshaft is disconnected and blocked.

Engine is in the TDC firing position of cylinder 1.

Keep the set of special tools 2 471 127 ready.

Number	Description
1	Basic carrier
2	0.7° setting gauge to adjust the intake camshaft
3	0.5° setting gauge to adjust the exhaust camshaft
4	Basic carrier screws on cylinder head
5	Screw gauge on basic carrier

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Use the setting gauge of 0.7° (1) from the set of special tools 2 471 127 to adjust the intake camshaft.
Use the setting gauge of 0.5° (2) from the set of special tools 2 471 127 to adjust the exhaust camshaft.

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Have the special tool 0 496 855 ready.

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Have the special tool 2 450 487 ready.

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

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Position the basic carrier (1) from the set of special tools 2 471 127 on the cylinder head.

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Tighten the screws (1) from the set of special tools 2 471 127 on the basic carrier (2) .

TIGHTENING TORQUE SPECIFICATIONS

Basic carrier to cylinder head
M6	Tightening torque	8 Nm

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Position the setting gauge 0.7° (1) from the set of special tools 2 471 127 between the basic carrier (2) from the set of special tools 2 471 127 and the intake camshaft (3).
If necessary, crank the engine at the crankshaft using special tool 0 493 380 (11 6 480) .
Tighten the screws (4) from the set of special tools 2 471 127 .

TIGHTENING TORQUE SPECIFICATIONS

Test gauge to basic carrier
M6	Tightening torque	8 Nm

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Release the VANOS central valve (5) of the intake adjuster.
Position the setting gauge 0.5° (1) from the special tool 2 471 127 between the basic carrier (2) from the set of special tools 2 471 127 and the exhaust camshaft (3).
If necessary, crank the engine at the crankshaft using special tool 0 493 380 (11 6 480) .
Tighten the screws (4) from the set of special tools 2 471 127 .

TIGHTENING TORQUE SPECIFICATIONS

Test gauge to basic carrier
M6	Tightening torque	8 Nm

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Release the VANOS central valve (5) of the exhaust camshaft adjuster.
Ensure that the flattened areas (1) on the intake camshaft and exhaust camshaft point upward.

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Turn the intake camshaft (E) and exhaust camshaft (A) so that the marks (1) can be read from above.

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Ensure that the cam (1) on the exhaust camshaft on cylinder 1 points to the inside right at a slight angle.

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Ensure that the cam (1) on the intake camshaft on cylinder 1 points to the inside left at an angle.

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