Regrind crank or not?

[dagmarsawayn]

Hi,

I have two cranks, and I'm deliberating which one to use and which one to sell. There isn't much to choose between them; both are dimensionally ok - not oval or tapered to within half a thou - but there us some slight scoring.

The best one has some slight visible scoring on one or two journals that I can barely feel with my fingers. Do you think this will be ok to use - I don't have a camera so couldn't put a picture up? It's so slight I think it would polish out with a strip of rag and some fine valve grinding paste. I don't believe in grinding a crank when it's not needed.

The other crank has one or two deeper scores that I can feel with my finger nail around the whole circumference so I've dismissed it on that basis

[Mc Tool]

Anything you can feel is definitely suss ,specially if its going into your own motor .Its surprising just how small a gouge you can "finger nail " .....might only be a thou or so . I would get a bit of 800-1000 grit wet and dry sand paper ,cut a strip as wide as the journal , squirt of crc wd40 what ev , put the crank in the upturned block and rotate it ( helper may be req) and apply sandpaper to journal. If its a main just leave the shell out and slip the sandpaper in behind journal . If the marks dont polish out by the time the rest of the journal is showing signs of the polishing give up and grind it.

[rich112]

Happen to be looking at mine tonight too! These are the worst. You can see the marking on the shells too.

Might try the bootlace and 400 oxide paper first!