Cylinder material for fin repair

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Cylinder material for fin repair

Postby billc » Mon Jul 15, 2019 9:03 pm

Can someone please tell me what material the cylinders are made of ? I need to do some fin repair. Thanks.
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Re: Cylinder material for fin repair

Postby Mutt » Mon Jul 15, 2019 9:55 pm

just plain old gray cast iron. I use plain ol' cold roll steel to repair fins
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Re: Cylinder material for fin repair

Postby billc » Mon Jul 15, 2019 10:11 pm

do you braze, tig or arc weld your repairs ? i'm repairing the top fin so access isn't a problem.
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Re: Cylinder material for fin repair

Postby bobscogin » Tue Jul 16, 2019 12:09 am

billc wrote:do you braze, tig or arc weld your repairs ? i'm repairing the top fin so access isn't a problem.


I just cut the repair piece out of 1/8 thick hot rolled sheet and braze it. Pre-heat a little and focus the heat on the cylinder since the brass often prefers to run to the carbon steel. Not the prettiest job you'll ever see but ok for an amateur.

Bob
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Re: Cylinder material for fin repair

Postby billc » Tue Jul 16, 2019 12:53 am

thanks guys.
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Re: Cylinder material for fin repair

Postby billc » Sun Jul 21, 2019 10:25 pm

I figure if Bob can do it so can I :-) . Got this 165 cylinder off fleabay for $39 . It had some broken fins and needed a bore job ( .030 ) . I have a boring machine but never fixed fins before. I ain't a'skeered of fin repair no more. Piece of cake :-) Still need to do the other side blend them in but I'm pleased for my first effort.
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Re: Cylinder material for fin repair

Postby billc » Sun Jul 21, 2019 10:27 pm

gettin there
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Re: Cylinder material for fin repair

Postby Mutt » Mon Jul 22, 2019 7:29 am

Looking good Bill
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Re: Cylinder material for fin repair

Postby billc » Wed Jul 24, 2019 8:29 pm

Got the cylinder bored and the fins done . I still have to build and install the crank but I couldn't resist a little mock up to see how it looks. Put some spit shine on the side covers too :-)
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Re: Cylinder material for fin repair

Postby bobscogin » Wed Jul 24, 2019 9:04 pm

Looks good!

Bob
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