crankshaft problem

[Jim Wilson]

I was in the process of removing my pistons when I accidentally scraped the crankshaft with one of the connecting rod bolts. The scrape is about 1-inch long, 1/8 inch wide and at most 1/32 inch deep.

Can I simply use a piece of emery cloth (like 600 grit) to remove the sharp edges of the scrape or do I need to remove the crank and have that journal completely reground?

Your thoughts are most appreciated!

 

[Anthony - 98 GTS]

Why not offset grind the crank for a 510 stroker while you have it out?

 

[Johann]

As long as there are no raised edges to gouge the bearing, the scrape shouldn't cause a problem, think of it as a small oil reservoir.

Others will disagree.

 

[GR8_ASP]

A lot depends on the location and orientation. If it is outside of the highly loaded regions (compression and inertial loading) it may be okay. I say may as I would be skeptical based on the description of the size. How do you make that big of a mark? That would be difficult to do with a hardened file (1 inch long, 1/8 inch wide and 1/32 deept )

In general if you can catch your fingernail in a depression it is too large. Also, make absolutely sure that there is no raised surface. Any at all is deadly.

 

[Dronabinol]

As long as there are no raised edges to gouge the bearing, the scrape shouldn't cause a problem, think of it as a small oil reservoir.

Others will disagree.

I agree