MTFCA Forum

What is the suggested hole diameter on the block crankshaft bearings ?
Thank you.

Don't know factory specs but I just drill in sizes until hit cast iron, just checked a clean block and can drop in a 11/32" drill bit in the front and centre and a 29/64" in the rear.

I used to go through the time-consuming job of setting the block up in the mill to cut the oil axials, now just a block of wood, clamps and use a router, much easier.

Frank, great idea! Thanks