Blocking the engine in the TDC firing position

Loosen clamp (1).
Feed out and remove the sealing cap (2).

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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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Turn the engine in the arrow direction to the TDC firing position of cylinder 1 using special tool 0 493 380 (11 6480).
Vehicles with automatic transmission:
Dimension (X) = 66 mm

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

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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 is in TDC firing position of cylinder 1.

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Vehicles with manual gearbox:
Dimension (X) = 61 mm

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

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Vehicles with manual gearbox:
Special tool 2 288 380 incorrectly positioned.

TDC firing position of cylinder 1 not achieved.

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Vehicles with manual gearbox:
Special tool 2 288 380 correctly positioned.

Engine is in the TDC firing position of cylinder 1.

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NOTE: TECHNICAL INFORMATION
Alternative to the new special tool 2 471 127 , the already present special tool 2 456 372 can be used in modified form.
The modified special tool is upward compatible.

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Keep set of special tools 2 471 127 at hand:

Number	Description
1	Basic carrier
2	Setting gauge for adjusting the intake camshaft
3	Setting gauge for adjusting the exhaust camshaft
4	Screws for connecting the basic carrier to the cylinder head
5	Screws for connecting the gauge to the basic carrier

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

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 that the marks (1) on the intake camshaft (E) and the exhaust camshaft (A) 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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Ensure that the flattened areas (1) on the intake camshaft and the exhaust camshaft point upward.

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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 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 358122 between the intake camshaft and the basic carrier from the set of special tools 2 471 127.
Position the test gauge (2) from the set of special tools 2 358122 between the exhaust camshaft and the basic carrier from the set of special tools 2 471 127.

Tighten screws (arrows).

TIGHTENING TORQUE SPECIFICATION

Test gauge to basic carrier
M6	Tightening torque	8 Nm

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