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Is light crank scoring ok?

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John Mark Dongon

Proven Member
94
5
Feb 7, 2019
Stockton, California
I don't want to disassemble and buy a whole new crankshaft if it's not all that bad. It's light scoring I can feel with my fingernails. It's overall more smooth than scoring tho. The 3rd journal is not scoring just dirty.
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The rule of thumb is if you can feel scratches with your nail it needs to be polished. I'm sure you can slap some new bearings in and it will run, but for how long will be the question.
 
you might be able to get by with having it polished. You should take it to a machine shop and have them check it out
 
The point is why the op is doing this. I remember that he said in his other post that he rotated the crank a couple of times by hand then some bearings got damaged because of dirt/debris. So our suggestion would be the same like we already recommended him that clean everything up and rebuild properly with good parts.
 
The point is why the op is doing this. I remember that he said in his other post that he rotated the crank a couple of times by hand then some bearings got damaged because of dirt/debris. So our suggestion would be the same like we already recommended him that clean everything up and rebuild properly with good parts.

Agreed.
May be that it's dirty, but that #3 journal looks undersized and the finish looks poor. Still could just be whatever goop is on it.

At minimum the crank needs to be taken out, properly cleaned, checked to specs and machined if possible. Issue is it may not be worth it, just have to pull it and see.
 
Thats crank is done, short of you machining the journal undersized which some say is not recommended , it is unusable. Notice he similarities?
 

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This has been continued from the OP's previous post below. "cleaned" comes from there. @ThunderChild didn't mean only for the crank.
https://www.dsmtuners.com/threads/crankshaft-connecting-rod-wiggle-play.522141

Idk know what to make of this.......all good though man

edit: got it now, had to read that a few times

all I know is that looks like some NAR NAR to me

Look around for a parts car or partout. you could find a crank way better than that for a couple hundred or even less if your patient. I picked up a clean never torn down shortblock for 150 last summer, for example.
 
Idk know what to make of this.......all good though man

edit: got it now, had to read that a few times

all I know is that looks like some NAR NAR to me

Look around for a parts car or partout. you could find a crank way better than that for a couple hundred or even less if your patient. I picked up a clean never torn down shortblock for 150 last summer, for example.

Agreed, and being a 7-bolt it's far easier to find a good crank than a 6-bolt.
 
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