Joined: Sep 2018 Posts: 255 Threads: 67
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Hi Guys, The spares with my A7 included a spare crank that had been white metaled and then taped up and stored, rather than heavily greased. Anyway, the question is can the journals be cleaned up (machined) as they have the finest of surface rust after years of being stored. It's a shame they have been stored this way. Also if they can be cleaned, how much can be taken off safely, or are these now useless. It does come off with fine paper and water. Is white metalling an expensive process these days.?
Regards RPM
Joined: Aug 2017 Posts: 1,187 Threads: 71
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Certainly not cheap. Have you tried using something like T-Cut on the journals rather than a fine paper?
Joined: Sep 2018 Posts: 255 Threads: 67
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Hi Hugh, would need something a little more aggressive that T-cut may work with 3 os wire wool.
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Location: Scotchland
21-01-2021, 12:37 PM
(This post was last modified: 21-01-2021, 12:38 PM by Ruairidh Dunford.)
Are you talking about the cleaning up the crankshaft journals, the white metal in the rod, or both?
Joined: Sep 2018 Posts: 255 Threads: 67
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Hi Ruairidh , Just the crank I dont have the rods.
Joined: Mar 2015 Posts: 5,436 Threads: 231
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Location: Scotchland
You can happily polish the journals up yourself with fine emery tape or take it to a machine shop for similar. Do you have a lathe?
However, it if were me and I was going to get the rods metalled to it, I would take it to a crank grinder and ask them to clean it up, then get the white metal to suit it. Not a costly exercise.
Joined: Sep 2018 Posts: 255 Threads: 67
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Hi Ruairidh, that sounds good advice. Sadly I have no lathe. I will give them a very light clean and grease them until needed. I'm hoping to build a spare engine.
Thanks for your help.
RPM
Joined: Aug 2017 Posts: 914 Threads: 22
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Location: Near Cambridge, UK
Car type: 1928 tourer (mag type), short chassis Gould Ulster
If the surface rust is light you have nothing to lose by cleaning up using fine emery cloth strip. If the journals look good after that, check the size and you will probably find no appreciable reduction from what they were ground to. If they still show pitting you have lost nothing but a very light grind would correct the situation.
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Location: Richmond, Texas, USA
I am confused! In what way was the crank white metalled? White metal generally goes on connecting rods, not cranks.
Joined: Dec 2017 Posts: 1,160 Threads: 68
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Location: Nottinghamshire. Robin Hood County
Car type: Austin Ruby Mk1 1935
Hi Rpm, Would it clean up with one of the nylon abrasive pads. Much less sever than emery cloth.
John Mason.
Would you believe it "Her who must be obeyed" refers to my Ruby as the toy.
