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cam markings

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6

69tr

Jedi Trainee
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The Bentley book says to get an initial setting on the timing to raise #1 piston to TDC and turn the cam so that the "machined cutaway" is at twenty past four. It the machined cutaway the one that looks like an oil passage? The cam has a punch mark that is at the bottom when the above mentioned oil passage is at twenty past four.

I am replacing the sprockets so I am having to start from scratch on the timing.


Thanks again, Pete
 
Follow the Manual and go by the picture. However, the final position of the cam will be determined when the intake and exhaust are equal. That's when you bolt up the sprocket and chain. I wouldn't worry about the punch marks, because you didn't make them. Just go by the Manual.
 
Drop in the lifters & pushrods for #6. Put a finger on each pushrod, turn the cam until the point where both are moving and at the same height. That's TDC on the cam, close enough for the first try (or to see which mark the book is talking about).
 
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