Thread: How do I determine the number of flywheel teeth?

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Originally Posted by Dorsey

I may have to replace the starter in my mid-70's GM 400ci small block. How do I determine the number of teeth on the flywheel (flexplate?)
Thanks for your help.
Dorsey

I'm assuming that since you're replacing the starter, there's already one on the engine. Look at the mounting bolts on the starter. If they're directly across from each other, you have a flywheel with 153 teeth, If they're staggered / offset, you've got a flywheel with 168 teeth.

Bob