Thread: Crankshaft Question
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11-20-2010 08:38 PM #1
Crankshaft Question
I'm about to start on a 327 build and I've run into a little problem with the crankshaft. It's a small journal steel crank. I was cleaning the oil passages out today and noticed it has some pitting on the main journals and it's been turned. The block I pulled it and the rods out of was busted. The rods are good, had them re-conditioned, but I knew the crank had some places on the main journals in the area of the oil groove in the upper bearings where there was a little crusty buildup. I was concerned about them but I thought that turning the crank would fix it. If wasn't for them it wouldn't have needed turning. Anyway, the machine shop here in town doesn't turn cranks, he sends them to another guy that does it. He told him if it didn't look like .020 would clean it up to call him. The guy told him it cleaned up at .010/.010 and sent it back. As I understand he's been turning cranks for a long time. He also drilled and tapped it for a balancer bolt. When I picked up all my stuff I didn't lay it down and really check it out. I just glanced at it and the journals were nice and slick. Well today is the first time I really looked at it and the main journals have some small pitting. They're slick as glass but they have the pits so now what? I'm pretty sure another .010 won't get rid of them. Why would a shop that turns crankshafts send one back as good. I don't think the guy at my shop really looked at it to be honest. I think he took the guys word since I know he would have mentioned it to me. I know him. Is there any pitting like this that's acceptable? I assumed it's not a good idea to use it that way. I have been told it won't hurt anything since it's been ground and polished. Anybody have any thoughts? If I have to find another one it's gonna suck since they're not a bunch of them laying around.
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