Quote:
Originally Posted by Purdy Swoft
The real problem is that the timing dimple on all of the replacement cam gears are to small for the original timing pin to work well. It is always best to enlarge the dimple when replacing the timing gear . I use a five sixteenths drill bit to enlarge the dimple . If the dimple is large as original , the model A is probably the easiest car ever to set the timing on . Since I was fourteen years old I've never needed to stick anything in a spark plug hole to tell when the piston was at the top or use a mirror to see the dimple through the timing pin hole . Ford made the model A simple for the common man to set the timing . A lot of people try to make setting the timing as difficult as possible and usually end up with a car that won't run at all .
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+1!!!!
Sharpening the end of the timing pin a bit helps as well if you can't get to the dimple to drill it larger.