Would you guys use this?
 

I was distracted and handcranked the motor over a couple times without having put oil on the bearing.

When I pulled the bearing back out it had this little wear spot.....

It looks more like a piece of dirt behind the bearing which causes a small wear spot . Lack of oil usually is not point loaded like that. But hey what do I know? Lol

That's a possibility too. This wasn't a final assembly - was just trying a rented spring compressor and got carried away.

I boogerred up an oil ring so the last piston isn't going in anyways today I was just wondering if I should grab an extra bearing set or if this was okay to reuse.....

Use it.

If nothing is stuck in it or sticking up its fine.
Or if you will always be thinking you should of changed it than do it now. LOL

Thinking about that some more find out why that's happening if its the bearing or something else. Better to be safe than broken.

You really don't want to pull the motor out again for some thing like that------- change the bearing out and be done with it,,Also check the crank out------------ and make sure that what ever you are doing in that engine that everything be operating room clean and spotless,no dirt, no dirt, no dirt !
Good luck


Jim :cool:

get the piece of dirt off the back side and run it.

IF it was a problem with the crank it would have been a streak or line on the bearing not a spot. The problem is with the bearing or dirt under it. If you don't find anything stuck to the back side replace the bearing.

I'd replace it only because I would always be wondering about it in the back of my mind for the first hundred hours.

I think I'm going to just replace it. I don't want to come this far and have something like this bother me....

Thanks guys

...and put some assembly lube on them this time. ;-)

I'd be looking at the radius's on the crank,,you have some wear on the edges of the bearing.that needs to be looked at.
whats the history on this engine?any blow ups?

it will look worse in 10 mins of running...as long as the clearance is correct it will be fine..I would NEVER turn them over dry my .02

When i put bearings in i clean the back side of the bearing and block/rod woth brake clean and a towel that wont leave anything behind. Then i put the bearing in and clean the face of it the same way. Then Put assembly lube on the face and assemble immediately. Assembly lube and oil attract dirt out of the air and it will collect .

STP works good as assembly lube. :)

Cranks undergo serious distortion under load. David Vizard went as far as to claim that line hones aren't really necessary on budget builds because the cranks distortion under load makes it trivial.