Airwreckc Eric Cumming RTP, North Carolina (249 posts) Registered: 05/28/2020 10:10AM Main British Car: 1972 MGB-GT (working on a Sebring project) Buick 300-4 V8 |
Crankshaft "gouge"
Hi all,
After a lot of searching, I found a 350 crank recently. Upon initial inspection, it appeared to be pretty clean and apparently recently ground 10 thousands under. I started to clean it up and begin a polishing process and then noticed a small gouge near one of the oil galleys. I'm not sure if going to the next size under will eliminate it, so wondering if it's something that could normally be lived with. Of course, I'll have the crank checked for cracks, but otherwise, what do people do with these sorts of things? Too bad it's not on the mains, since those have a lot of grinding to be done... Edited 1 time(s). Last edit at 12/02/2022 05:20PM by Airwreckc. |
BlownMGB-V8 Jim Blackwood 9406 Gunpowder Rd., Florence, KY 41042 (6469 posts) Registered: 10/23/2007 12:59PM Main British Car: 1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS |
Re: Crankshaft "gouge"
Since it isn't on the thrust side of the journal you can probably get by with just cleaning it up a little and having the crank ground. There may be a small chance it could pick up whatever dirt or grit might come through but for the most part it will just fill up with oil and not cause a problem. Generally speaking you want a smooth continuous surface but imperfections below that surface aren't going to touch the bearing.
Jim |
DiDueColpi Fred Key West coast - Canada (1365 posts) Registered: 05/14/2010 03:06AM Main British Car: I really thought that I'd be an action figure by now! |
Re: Crankshaft "gouge"
Take it to a good machinist and get it properly ground and you'll be fine.
It looks like the previous grind ignored the fillets all together, which can lead to cracking. Get the fillets rolled and then grind the crank. Go find sleeping beauty and live happily ever after. Live like you mean it Fred |
Airwreckc Eric Cumming RTP, North Carolina (249 posts) Registered: 05/28/2020 10:10AM Main British Car: 1972 MGB-GT (working on a Sebring project) Buick 300-4 V8 |
Re: Crankshaft "gouge"
Fred, ha--I already have Sleeping Beauty ;)
Thanks for pointing out the lack of fillets--missed that myself. Eric |