Fixed medieval crank pulley
Fixed my medieval crank pulley today. It is the V1 that had the bad little screws holding the crank timing plate on. They sheered off under load, and I found out just how well the FS-DE runs when it doesn't know where the crank is (it doesn't...). So today, I fixed it.
This is what it looked like with the screws sheered:
I drilled out one of the holes, and tapped it:
Inserted a helicoil for more even thread pressue distribution, and better bite into the aluminum:
A 1/4 x 20 grade 8 bolt fits nicely now:
I was going to reuse all four holes, but had a hard time drilling out those little screws. So instead I went to a triangular pattern and braised in some aluminum to fill the little holes:
Another shot of the fixed pulley:
With the timing plate bolted back on. I don't think my engine has enough torque to bust three 1/4 x 20 grade 8 bolts:
I will probably have to either switch to a pan head bolt, or grind down the top of these bolts for clearance issues, though. Anyway- I can't wait to get it installed back on the engine...