Crank bolt to hold damper

Have you looked at what Loctite has? They have some specific stuff for thread, shaft and keyway repair. I used the keyway stuff on a 1.8 BP Mazda where the damper went onto the crank (forged) and it repaired it. Follow the directions to the letter. The one I used only work in the absence of oxygen, so you apply the compound and assemble and let it sit 48 hours.