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Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Yes, looks like rust; no, you should not be worried; yes, it's typical for most anything made of cast-iron.
Some 600 grit paper with a bit of ATF will clean it right up off of the critical spots (journals, seal surface). Smear a bit of white lithium grease on those areas to keep it from happening again and of course keep it in the plastic bag until the moment of truth arrives. Store it standing on end, not laying down.
For 1 so much for quality control on brand new parts.
2 sanding any of those gernals will cause those areas to become rough and prematurely damage the crank berrings. It is just not safe practice!!
Plus any contaminates getting in that engine from any part can cause inproper torque specs to be made on the crank and or proper spacing between crank and berrings n berring caps thus for causing over heating then failture. Also u are sanding not only rust but u are also sanding off milliseconds off the diameter causing issues. Though this may not have happened to anyone that has tried sanding those areas had failture. Don't mean success.
3 i agree though it may be common to receive a brand new rusted crank shaft doesnt mean clean it up and sand it !!! Auto stores need to do their dang on job securing the facts this won't happen. Its called proper packaging. Lubricants to preserve its contents.
600 grit won't make that "rough"; it's about 300 finer than what that crank was ground with.
We call that "POLISHING".
Milliseconds is a unit of time: one-thousandth of a second. Not sure how we'd sand that off of a crank, butt hay, whatevs.
Can't say I've ever run into "failure" problems as a result of polishing a crank; but I suppose it could happen in some alternate universe somewhere.
"Proper packaging" would indeed be wonderful. It would also be wonderful if people stopped at stop signs, if your kids listened to you the 1st time you told them something, you could shed those ugly pounds without strenuous exercise and unpleasant dieting, and about a million other things. Butt hay... this is THE REAL WORLD... too late to go back and "properly package" something that's already shipped. Best to just clean up that little tiny bit of nothing and move on. Less trouble than shipping it back and it maybe happening again... or worse.
600 grit won't make that "rough"; it's about 300 finer than what that crank was ground with.
We call that "POLISHING".
Milliseconds is a unit of time: one-thousandth of a second. Not sure how we'd sand that off of a crank, butt hay, whatevs.
Can't say I've ever run into "failure" problems as a result of polishing a crank; but I suppose it could happen in some alternate universe somewhere.
"Proper packaging" would indeed be wonderful. It would also be wonderful if people stopped at stop signs, if your kids listened to you the 1st time you told them something, you could shed those ugly pounds without strenuous exercise and unpleasant dieting, and about a million other things. Butt hay... this is THE REAL WORLD... too late to go back and "properly package" something that's already shipped. Best to just clean up that little tiny bit of nothing and move on. Less trouble than shipping it back and it maybe happening again... or worse.
If u seriously feel that 600 grit is polishing metal then how bout u detail your truck with it before posting brutha lmao.... no worries you made some other good points n comment n thank u for chiming in.
As you shave off rust with 600 grit sand paper the rust becomes your extra course sand paper now your using rusted cast iron metal flakes to "So Call Polish" mine as well Just install it the way it is n have the same 50/50 Chance of running your crank berrings through the mud.
"Though i said just because you have sanded it and have gotten lucky!" DOES'T MEAN DO IT!
You are still running high risks of berring damage you can also knock off the ballance of that crank
Keywords are "LONG TERM AFFECTS & 50/50 CHANCE DAMAGING CRANK BERRINGS, NOT ADVISEABLE!!!. SAND IT AT YOUR OWN RISK!"
1000/1200 grit at most for polishing
As for you got to love the capabilities of voice to txt though at times it gets twisted.
Last edited by Rumpleforeskinz; Jul 5, 2016 at 11:02 PM.
I've heard this before and I've almost always picked my crankshafts up from the machine shop in that standing position but why?
I don't want to hear some bogus answer how the crank will warp .0001" being laid down. If it was that flimsy, it would grenade at 7,000 RPMs.
It didnt matter, when I turned the crank over, it was worse and there was chips out of the metal.
When I took it back to the store, the manager look at it and he was shocked that this was sent to me. There was no lubrication on the. Rank at all, the rust had started pitting the metal and the machining was so poorly done, he said his 5 yr old could have done a better job.
He called his online dept, had them order me a new one and because of the screw up's prior to this piece of junk being sent, I was given one for free.
Just got it the other day and it is perfect. Hoping to have it in, within the next couple of weeks.
Good to hear, I would deff not of accepted that. Return for sure... I just got my new crank and it had ZERO rust on it. There are still several checks that need to be made tho before I will accept it. Mains and rod journals need to be round and true.
