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 Post subject: Crank repairs
PostPosted: Tue Jan 20, 2009 10:35 pm 
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Give Ash some flowers Nick .
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Location: Toowoomba Region, QLD
I'm just wondering how easy it is to get the end of a crank built up and repaired?

I have a contact selling a block (incl. caps), gearbox, crank, rods and pistons (whole lot in need of a rebuild) for a very good price but the nose of the crank (clutch end) has seccumbed to the weather and wouldn't clean up with just getting machined.

How easy is this to do. If it is doable, judging by the price all I will have to do is make room for it somewhere :)

BTW, it's an 1100S motor.

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 Post subject:
PostPosted: Wed Jan 21, 2009 6:26 am 
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1275cc
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would depend how bad it is, if it is cracked and whether the journal size justifies trying to save it. if the journals need more than +40 to clean up, forget it. On the other hand if they are 0,0 and large journal, no cracks, you might have a good prospect for saving.

pics will help as will measurements

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 Post subject:
PostPosted: Wed Jan 21, 2009 7:03 am 
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1275cc
1275cc

Joined: Mon Mar 22, 2004 7:41 pm
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Location: Plumpton, NSW
The aviation industry has a method of "spraying" metal onto an affected surface which then allows the crank to be re-machined back to original tolerances. A colleague (ex QANTAS engineer) in the renault club had a rare renault crank re-furbished in this manner once. Not sure of the exact details.

I'd speak to GR though to see what contacts he has. If you have no luck I can ask my friend whether he had it done commercially or "in-house"

KB

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 Post subject:
PostPosted: Wed Jan 21, 2009 12:49 pm 
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Tomboss Breweros
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I'd take it to an good mini workshop and see what they think.

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 Post subject:
PostPosted: Wed Jan 21, 2009 2:17 pm 
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1360cc
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1310/71 wrote:
The aviation industry has a method of "spraying" metal onto an affected surface which then allows the crank to be re-machined back to original tolerances. A colleague (ex QANTAS engineer) in the renault club had a rare renault crank re-furbished in this manner once. Not sure of the exact details.

I'd speak to GR though to see what contacts he has. If you have no luck I can ask my friend whether he had it done commercially or "in-house"

KB


Sounds expensive :? I am sure you can find a better one for far cheaper than a spray on metal process surely?

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 Post subject:
PostPosted: Wed Jan 21, 2009 2:27 pm 
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The Mini King
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Location: Windsor, NSW
You could try Hard Chrome Plating then re grind


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 Post subject:
PostPosted: Wed Jan 21, 2009 6:04 pm 
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998cc
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Joined: Tue Apr 11, 2006 8:15 am
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Location: Brisbane
Nick,
It is more than likely that the crank could be repaired, but at what cost?
In my opinion Mini cranks are not rare enough to warrent spending the sort of money it will cost to have it repaired properly.
You are better off finding a good crank and buying it, it will be far more economical to do it that way.
At the end of the day you won't have a repaired crank in your engine either!
Dave

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 Post subject:
PostPosted: Wed Jan 21, 2009 6:11 pm 
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Give Ash some flowers Nick .
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Location: Toowoomba Region, QLD
Thanks for the advice guys, I thought that might be the case.

I'm just gonna have to make the space for the engine somewhere cause the price is still too good to leave it there :)

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