Blocking engine in TDC firing position

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Guide out and remove sealing cap (1).

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NOTE: RISK OF DAMAGE
Damage to the engine.
If the engine is manually rotated in the wrong direction of rotation, the engine can be damaged.

Only rotate the engine manually in the correct direction of rotation: a) clockwise when looking at the damper, or b) counterclockwise when looking at the chain drive. b) applies only if the timing chain is installed in the rear.

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With the special tool 0 493 380 (11 6 480) , turn the engine in arrow direction to the TDC firing position of cylinder 1 .
Vehicles with automatic transmission:
Dimension (X) = 66 mm

Special tool 2 288 380 must be inserted up to dimension (X) into the dowel hole.

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Vehicles with automatic transmission:
The special tool 2 288 380 is incorrectly positioned.

TDC firing position of cylinder 1 not achieved.

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Vehicles with automatic transmission:
The special tool 2 288 380 is correctly positioned.

Engine in TDC firing position of cylinder 1.

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Vehicles with manual gearbox:
Dimension (X) = 62 mm

Special tool 2 288 380 must be inserted up to dimension (X) into the dowel hole.

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Vehicles with manual gearbox:
The special tool 2 288 380 is incorrectly positioned.

TDC firing position of cylinder 1 not achieved.

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Vehicles with manual gearbox:
The special tool 2 288 380 is correctly positioned.

Engine is in TDC firing position of cylinder 1.

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Have the set of special tools 2 456 372 ready:

Number	Description
1	Basic carrier
2	Setting gauge for adjusting the intake camshaft
3	Setting gauge for adjusting the exhaust camshaft
4	Basic carrier screws on cylinder head
5	Screw gauge on basic carrier

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Have the test gauges from the set of special tools 2 358 122 ready:

Number	Description
1	Test gauges for fixing in place the intake camshaft
2	Test gauges for fixing in place the exhaust camshaft

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Make sure the marks (1) on the intake camshaft (E) and the exhaust camshaft (A) are legible from above.

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Make sure the cam (1) on the exhaust camshaft on cylinder 1 is pointing slightly to the inside right at an angle.

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Make sure the cam (1) on the intake camshaft on cylinder 1 is pointing leftwards at an angle.

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Make sure the flattened areas (1) on the intake camshaft and the exhaust camshaft are pointing upwards at an angle.

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Position the basic carrier (1) from the set of special tools 2 456 372 on the cylinder head.

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Tighten the screws (1) from special tool set 2 456 372 on the basic carrier (2).

TIGHTENING TORQUES SPECIFICATION

Basic carrier to cylinder head
M6	Tightening torque	8 Nm

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Position the test gauge (1) from the set of special tools 2 358 122 between the intake camshaft and the basic carrier from the set of special tools 2 456 372 .
Position the test gauge (2) from the set of special tools 2 358 122 between the exhaust camshaft and the basic carrier from the set of special tools 2 456 372 .
Tighten the screws (arrows).

TIGHTENING TORQUES SPECIFICATION

Test gauge to basic carrier
M6	Tightening torque	8 Nm

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