Valve Timing, Checking: Procedure

Preliminary work may be required depending on the model. Refer TIMING CHAIN, CHECKING .

-- Remove the upper timing chain cover. Refer to TIMING CHAIN COVER, REMOVING AND INSTALLING, ENGINE WITH TWO CAMSHAFT ADJUSTERS .

-- If not removed, remove the noise insulation. Refer to Overview - Noise Insulation and Noise Insulation, Removing And Installing .

-- Turn the crankshaft with the : T40263  , : T40314  and 24 mm socket on the vibration damper in the direction of engine rotation until the marks -1 and 2- are almost on top.

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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.

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-- Insert the : VAS6341  with the : T10170A  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

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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 align with the markings -2 and 3- on the cylinder head.

Without Marks in the Cylinder Head Cover

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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.

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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-.

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• Specified value: 124 to 127 mm.