F 450 4WD Super Duty V10-6.8L VIN D (2004)
Timing Chain: Diagrams
Position the crankshaft with the keyway at the 12 o'clock position.
The copper links mark two links on one end and one link on the other end, and use as timing marks.
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LH camshaft timing mark is approximately at 12 o'clock.
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RH camshaft timing mark is approximately at 11 o'clock.