about how much wear is acceptable on a crankshaft for rebuilding without having to turn it. i had started a thread a while back about a z6 that totally killed a bearing, gave up looking for a crank and bought a entire bottom end just for the crankshaft, because im not so sure the other crank is turnable, it looks pretty bad. but this crank in this new block looks great but the cylinder bores look horid...anyway i was wondering if any craters or pockets are acceptable, theres one so tiny so can barely see it on the number 1 main bearing journal, at first i thought it was bearing material but i got a magnifying glass and its defintely a little crater in the crank. there was absolutly no damage to this bearing at all no scoring or anything. however when i seperated the rod end cap from number 2's rod. the bearing half opposite the rod cap end was cracked and broken in 3 pieces, no damage to the crank that i can see, smooth as silk even under the magnifying glass. however number 4's rod journal has a mirror type finish to it, no damage at all to the bearing. my question is this a good crankshaft to use to get me by for a little while...i have 3 d series blocks lying around all 1.6's and id like to get one built to replace my high mileage mini-me...its starting to smoke and rattle and it feels down on power

 

also that number 4 rod journal is in the out of round limit

 

What exactly is the question?

If it measures within the limits, then isn't that portion self explanatory?

I am sure in your other thread somebody stated that if you can feel it with your finger nail, that it needs to be turned. The ONLY way to know if a crankshaft is usable is to measure it with micrometers and to be sure no ridges, dings, pits, ect can be felt by hand. It is starting to sound like you are being too picky due to lack of experience. Take it to a "qualified" person and let them make an educated decision for you.

 

no i cant feel it with my finger nail, everything is as smooth as glass, id just like some educated opinions before i go to analy cleaning every single piece, and i measured everything with a caliper already and it seems fine...ive built a few chevrolets but ive heard hondas can be finicky so id just like to do it right

 

and my question is mainly about the very tiny crater, if youll think itll score the new bearing. this engine isnt suppose to last long, i just need to pull my current powerplant because i have big plans for it...hopefully which ill be documenting on that other thread a i mentioned, it will be done to more than exact specs, blueprinting and everything.

 

Post a picture of it.
Any pitting and galling on a cam or crank is usually a bad thing.
To me it sounds like you want to run it regardless of what we tell you.