Crank seals

[Jon Pike <jhpike@domain.elided>]

Hello all..

Well, still trying to get the last of my parts back from a certain well
known machine shop.

The crank, flywheel and other rotating parts attached thereto, I was to 
get back this weekend..  to make a long story short, I didn't get 
everything back, and the crank submitted didn't look like the one I gave 
him.

Which brings me to my question. On a crank, there is the surface where 
the rear oil seal contacts. Sometimes, there is a groove worn in that 
surface, assumably from dirt and the rear seal grinding away.

How deep of a groove before it becomes a problem?

And, how repairable is this condition?

I distinctly remember my crank to have either none, or a hardly 
detectable groove..  the one trying to give me back has a rather 
significant one.

Appriciate any info on this..

Jon

77 Spider
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