Valve Timing, Checking

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Spark Plug Removal Tool: 3122B
Dial Gauge Adapter: T10170A
Wrench - 21mm: T40263
Adapter: T40314
Dial Gauge Set: VAS6341

Procedure

-- Remove the upper timing chain cover. Refer to UPPER TIMING CHAIN COVER, REMOVING AND INSTALLING .

-- Remove the front noise insulation. Refer to NOISE INSULATION, REMOVING AND INSTALLING .

-- Turn the crankshaft with the : T40263 , : T40314 and a 24 mm socket on the vibration damper in the direction of engine rotation until the marks -arrows- are almost on top.

Fig 1: Identifying Mark Points On Intake And Exhaust Camshafts

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-- Removing the spark plug from cylinder 1 with the : 3122B .

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-- Install the : T10170A all the way into the spark plug thread.

Fig 2: Identifying Adapter For Dial Gauge

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-- Insert the : VAS6341 with the : T10170A/1 all the way and secure it with the locking nut -arrow-.

-- Turn the crankshaft slowly in the direction of the engine rotation until the maximum dial reading is reached. When the maximum dial reading is reached (turning point of the meter) position the piston at >>TDC<<.

TIP:

If the crankshaft was turned past "TDC", turn the crankshaft two more turns in the direction of engine rotation. Do not turn the engine in the opposite direction of the engine rotation.
The combination of the following shown : T40263 , : T40314 and 24 mm socket are better suited than the : T10355 for positioning the vibration damper.

With Marks in the Cylinder Head Cover

Fig 3: Identifying Vibration Damper With Counterhold - Vibration Damper T10355

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The notch on the vibration damper must align with the arrow marking on the lower timing chain cover -arrow-.
The markings -1- on the camshaft chain sprockets must be opposite the markings -2 and 3- on the cylinder head.

Without Marks in the Cylinder Head Cover

Fig 4: Identifying Counterhold Tool And Markings

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The notch on the vibration damper and the marking on the lower cover for timing chain must be opposite one another -arrow-.
The markings -1- on the camshaft chain sprockets must point upward.

-- Measure the distance from the edge -1- to the marking -2- on the exhaust camshaft chain sprocket.

Fig 5: Exhaust Camshaft Chain Sprocket Distance Markings

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Specified value: 74 to 77 mm.

-- Once the specified value is reached, measure the distance between the mark on the exhaust camshaft chain sprocket -3- and the mark on the intake camshaft chain sprocket -4-.

Fig 6: Exhaust Camshaft Chain Sprocket Measuring Distance

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Specified value: 124 to 127 mm.

NOTE:

If one tooth has an offset, there will be a deviation of approximately 6 mm from the specified value. The timing chain must be installed again if an offset is determined.

Tightening Specifications

Refer to OVERVIEW - NOISE INSULATION .