REP-TAT-P-1131-05 Checking camshaft timing (AT)

NOTE: RISK OF DAMAGE
Damage to the engine.
The engine may be damaged if it is manually rotated in the wrong direction.

Rotate the engine in the correct direction of rotation by hand only: a) Clockwise, facing the vibration damper or b) counterclockwise, facing the chain drive. b) only applies if the rear timing chain is installed.

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With the special tool 0 493 380 (11 6 480) , turn the engine to the TDC firing position of cylinder 1.

Block the crankshaft in the TDC firing position of the 1st cylinder (automatic transmission)

Vehicles with automatic transmission:
Position the special tool 2 365 488 and secure with the corresponding screws.
Use the special tool 2 288 380 to block the crankshaft in the TDC firing position of cylinder 1.

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Check

Check if mark (1) of the exhaust camshaft and mark (2) of the intake camshaft can be read from the top.

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Result

» Marks (1) and (2) cannot be read from the top.

Measure

Check

Check whether the middle one of the 3 flattened areas (1) on both camshafts points upwards. The special tool 2 358 122 can also be mounted if the camshafts are twisted by 180 degrees (middle flattened area points towards the bottom).

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Result

» The middle one of the 3 flattened areas (1) does not point upwards.

Measure

Turn camshafts to the correct position so that the middle one of the 3 flattened areas (1) on both camshafts points upwards.

Check if the cams of the exhaust camshaft (1) and the intake camshaft (2) on the first cylinder are positioned as shown.

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Keep set of special tools 2 358 122 at hand:

Number	Description
1	Basic carrier
2	Basic carrier screws on cylinder head
3	Gauge to fix exhaust camshaft
4	Gauge to fix intake camshaft
5	Screw gauge on basic carrier

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Secure the basic carrier (1) of the special tool 2 358 122 with the screws (2) the cylinder head.
Position gauge (3) with the recess on the exhaust camshaft and fix with the screws (5) the basic carrier (1).
Position gauge (4) with the recess on the intake camshaft and fix with the screws (5) the basic carrier (1).

NOTE: If the special tool 2 358 122 can not be mounted, the timing must be reset.

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