Zach Baumann
Member
On disassembly of my fresh engine ~5k miles I noticed the crank looked pretty good minus one groove I can catch my nail on, on the number 7 rod. How you would guys go about fixing it?
Last edited:
Submerged arc welding. Crank spun much like on a crank grinder around the journal being 'rebuilt'. Weld is under a constant flow of ground iron/steel. Once the journal is welded, crank must get straightened. Than the weld rough ground. Now its ready to be reground/resized. You don't want a welded crank in any performance engine. I sure as hell don't.I used to work at a machine shop in Denver that could weld some new metal onto the crank and then grind and polish it to the correct diameter. I believe Zimmer Automotive went out of business years ago, but the technology clearly exists.