Plain Jane OEM nothing to see here rebuild

[RETed]

Originally Posted by JustJeff

Not so much a groove, it's shiny from wear...if you run your finger over it you can barely feel it. I do not know the history on it other than it came out of a 90. It's an eBay purchase, so I may not get a response to questions.

Hmmm...my vision was pretty bad last night due to a horrible few days at work, so you have to excuse me a bit.
I just saw that black line and went *WHAT?*.
So the black line is caused by paint?
There should be no other reason why such a black line be on that part of the counterweight due to normal use.

I'm also a little bit worried about you stating: "if you run your finger over it you can barely feel it."
It's in constant contact with a silicone oil seal that's rotating.
It it were a perfect world, that area should be smooth.
A slight imperfection could easily destroy the oil seal in short order.

Since concerns have been raised, it was also painted, which I planned on lightly sanding off, but it has a small notch in it also. Is that small ding enough to cause balance issues?

That ding doesn't look that bad.
There are vendors that offer (re)balancing services if you're that worried.

I assume that taking it to a machine shop would then affect clearance between seal and counterweight?

You can talk to the machine shop and ask them for their advice.
Explain the situation, and they should be able to give you an answer?
A competent machine should know proper clearances for this application with this type of seal...


-Ted