Bought a remanufactured crankshaft and there is a nick
08-23-2016, 07:36 AM
#4
Re: Bought a remanufactured crankshaft and there is a nick
I suspect @TomCat39 deleted my post, so i'll have to write it again.
Pic needed, but typically a barely noticeable fingernail sized groove in a crankshaft is okay and can be polished out by hand. I buy brand new Subaru EJ257/EJ251 crankshafts from the dealer at least once a month and periodically they'll have tiny gouges that I just polish out. These gouges come from bouncing around the box during shipping.
Pic needed, but typically a barely noticeable fingernail sized groove in a crankshaft is okay and can be polished out by hand. I buy brand new Subaru EJ257/EJ251 crankshafts from the dealer at least once a month and periodically they'll have tiny gouges that I just polish out. These gouges come from bouncing around the box during shipping.
08-23-2016, 09:36 AM
#5
Re: Bought a remanufactured crankshaft and there is a nick
I suspect @TomCat39 deleted my post, so i'll have to write it again.
Pic needed, but typically a barely noticeable fingernail sized groove in a crankshaft is okay and can be polished out by hand. I buy brand new Subaru EJ257/EJ251 crankshafts from the dealer at least once a month and periodically they'll have tiny gouges that I just polish out. These gouges come from bouncing around the box during shipping.
Pic needed, but typically a barely noticeable fingernail sized groove in a crankshaft is okay and can be polished out by hand. I buy brand new Subaru EJ257/EJ251 crankshafts from the dealer at least once a month and periodically they'll have tiny gouges that I just polish out. These gouges come from bouncing around the box during shipping.
Also your post was rather vague and appeared sarcastic in intent.
This post you provided is much more informative and helpful. Thank you @slomofo.
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08-25-2016, 04:01 PM
#9
Re: Bought a remanufactured crankshaft and there is a nick
Not trying to knock on your mechanical skills I don't know how else to put this, but that sounds like it may have been assembly error.
600 grit will remove material and have visible scratches that you can drag your fingers across and have your nails catch on. Even if you polished it properly, you still should've gone through and mic'd each journal and/or used plastigage to see exactly where you were at as far as clearances were concerned, but from your description of the events that unfolded, it almost sounds like improper torquing as well as incorrect bearing size.
Do you use a micrometer, bore gauge, dial indicator, plastigage, or assembly lube when you assemble?
@TomCat39
600 grit will remove material and have visible scratches that you can drag your fingers across and have your nails catch on. Even if you polished it properly, you still should've gone through and mic'd each journal and/or used plastigage to see exactly where you were at as far as clearances were concerned, but from your description of the events that unfolded, it almost sounds like improper torquing as well as incorrect bearing size.
Do you use a micrometer, bore gauge, dial indicator, plastigage, or assembly lube when you assemble?
@TomCat39
08-26-2016, 10:32 PM
#12
Honda-Tech Member
Re: Bought a remanufactured crankshaft and there is a nick
If it's above the surface, fix it now. If it's below the surface, let it ride.
And when I say fix it, I mean take it to get micropolished at a machine shop. Do NOT use 600 grit or anything of that nature. The journal has to be Damn near perfectly round within .0001" or else your back to square 1.
And when I say fix it, I mean take it to get micropolished at a machine shop. Do NOT use 600 grit or anything of that nature. The journal has to be Damn near perfectly round within .0001" or else your back to square 1.
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