Crankshaft defect

[JackFish]

After teardown I noticed a little nick on rod #6 crank journal:

I thought, oh no I hit it with a rod bolt!
But I was very careful, so I was surprised to see it.
So I looked at the bearing:

hmmm, a corresponding gouge in the bearing.
One could assume that whoever assembled this motor at the Ford plant did the bearing-nicking on this engine.
Or, a bit of metal got through the oil passage and got stuck there.

 

[Junk-Falcon]

ppp

 

[wsa111]

No big deal, mike the crank after polishing the nicked area, if all journals are round & not undersize, just put new bearings.
By the looks of the bearings looks like you tore down the engine in time to save the crank.
I guess the big thing is how much money do you want to spend???
To do it right bore it .020 over & grind the crank .010"
Your choice, cause what you have is at least it lets you make the $$$$ desision. Bill

 

[JackFish]

To do it right bore it .020 over & grind the crank .010 Bill

I think that's what they're going to tell me also.
Unless I can get something cheaper up here, it looks like Mike may be getting an order for a rebuild kit.

 

[addo]

It'll (spot) clean up fine for a non-race engine. See if you can "feel" it with a smooth flat file about 5/16" wide.

 

[JackFish]

It'll (spot) clean up fine for a non-race engine. See if you can "feel" it with a smooth flat file about 5/16" wide.

I won't be "feeling" a crankshaft with a file anytime soon.
I have left it all in the hands of the experts, one of the best engine builders in town.
I know when I've reached the limits of my capacities.
It was about the time I trashed the bearing trying to put the cam in! :roll:

 

[addo]

No need to be afraid! It's very easy to spot file something like that; you'll only lose a tiny proportion of contact area. Ditto for scraping a high spot on a nicked or dinged bearing.