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| | | | Joined: Nov 2003 Posts: 236 Shop Shark | | Shop Shark Joined: Nov 2003 Posts: 236 | I'm in the process of rebuilding my spare 56, 235. One of the jornals in the crank has a scratch around the center of it. It is probably.010 deep. What is the down side of this scratch? It runs all the way around the center of the jornal. The rest look good.
Glenn, | | | | | Joined: Sep 2007 Posts: 2,644 Shop Shark | | Shop Shark Joined: Sep 2007 Posts: 2,644 | Subscribing to this thread | | | | | Joined: Jul 2007 Posts: 461 Shop Shark | | Shop Shark Joined: Jul 2007 Posts: 461 | I would measure the journal with a micrometer. You might have significant wear on the journal, which would require grinding or rebuilding to restore the proper surface.
Don't guess at the condition in hopes that it will be alright.
Harvester | | | | | Joined: Oct 2005 Posts: 1,317 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 1,317 | If it's a "spare" engine I'd be tempted to polish up the journal with 1" crocus cloth and as Harvester pointed out, make sure that it wasn't egg-shaped. The cloth-backed abrasive belt material works well at smoothing out minor nicks or imperfections and is available at most automotive supply houses off a roll by the foot. You've just got to be careful to keep any of the aluminum oxide abrasive material from entering the oil passages. I've added a little oil to the belt to hold the abrasive.
The polishing action is much like buffing the polish on a pair of shoes. Might be considered pretty "old school" but I've salvaged cranks that were nicked by a rod bolt when the piston was slid into a cylinder.
Won't cost you a mint and might just keep that spare engine running without too big of an investment. However, I'd be sure to use a new insert or even better yet a full set.
Dave | | | | | Joined: Feb 2004 Posts: 29,750 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,750 | If it's just a scratch, with no high spots to gouge the bearing, no problem. I'd shoeshine it with fine-grit emery cloth, measure it with a micrometer to make sure the shaft is round, and give everything a good cleanup. The scratch will just pool oil under the bearing.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Jan 2006 Posts: 586 Shop Shark | | Shop Shark Joined: Jan 2006 Posts: 586 | I would not use Emory cloth, too gritty. I would use crocus cloth (red iron oxide)with light oil. Clean it up with thinners after.
Wanted Good Woman:
Must be able to cook , clean , sew , tune engines and polish trucks. Must have old Stovebolt and garage. Please send picture of old Stovebolt and garage.
| | | | | Joined: Feb 2006 Posts: 395 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 395 | take it to your local machine shop get opinion go from there,,turning a shaft cost about $100 cheap if you rebuid and it comes apart...doc | | |
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