Initial Cam Timing Question(s)
 

I am to the point of installing the cam sprockets on my rebuild project. This brought to me a question. Wayne's rebuilding book says to put the pulley at TDC and point the dot/"930"/keyway on the cams pointing up. In the later models (post '80) there is a large thrust washer and bolt that holds the sprockets on the cams. This is the bolt that is torqued to 88+ pounds (I think). The washer obscures the view of the dot once it's installed. My question is: How does one make sure the cam does not turn while tightening the bolt? The special sprocket tool holds the sprocket from turning. Does it also keep the cam from turning?

Thanks...

I think (not sure) that your supposed to put that little pin in to keep the cam from moving but i don't remember.

The dots only for the right ball park. The dial indicator is used to make the timing correct and ifastredsc is correct in his memory, the pin keeps the cam set at the right place.

Additional things you should consider:
1. Check the TDC mark for accuracy by measuring TDC yourself. Mine was off by over 3 degrees.
2. Verify the timing after you set it. rotate the engine an additional turn or two and remeasure the cam lift at TDC. Sometimes the slop will change things once it is tightened up and the slack removed by rotating the engine.

You and that TDC snowman.. :D

Recheck the timing with the dial gauges after you tighten the bolt - that is your final check...

-Wayne