Re: Harmonic balancer mystery, I'm dazed. Which one do I need?
Thanks a lot! that clarifies that I have a post 69 balancer on a 68 crank, that explains why I had problems timing it.
I might try to ''modify'' my balancer to avoid buying a new one. Your trick seems pretty good and precise but I know nobody who has one.
However, I managed to get a pretty good mark while checking for tdc, i used a bolt in the number 1 sparkplug hole, turned the crank until the piston touches the bolt, marked the balancer. Turned the engine the reverse side until piston touches bolt and made a mark. TDC is right between those 2 marks.
I repeated this procedure with 3 different bolts lenghts and ended up with 3 pretty close TDC.
I then realized that my TDC was aligned with the keyway and also exactly 10degrees off, so , even if I do not have another balancer to make a mark using your method, I have a pretty close location where i could use a hacksaw to make a new mark. I may end up with a 1 degree difference (2 at worst) but that shouldn't make a huge difference in the end. I might fill the old mark with body filler and re-paint the balancer too.
I would have prefered to find a cheap one online but all the manufacturers offers balancers for 69 and after only.
Thanks a lot again for the clarifications!