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john deere g


 
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2-banger
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PostPosted: Thu Sep 12, 2013 3:37 pm    Post subject: john deere g Reply to specific post Reply with quote

iam putting a ..g together for someone..its got a offset grd crank with powerblock..using a rods...pistons hit top of block..we had them machined down but they still hit...i dont know how much i dare machine them down getting close to top ring?..other than buying diff pistons...anyone ever have this problem what did u do?
 
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clampdaddy
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PostPosted: Thu Sep 12, 2013 6:20 pm    Post subject: Re: john deere g Reply to specific post Reply with quote

Is the top ring still below the spark plug hole?
 
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Earl-IL
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PostPosted: Thu Sep 12, 2013 6:30 pm    Post subject: Re: john deere g Reply to specific post Reply with quote

Block to crankcase plate ??
 
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ericsegaline
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PostPosted: Thu Sep 12, 2013 10:46 pm    Post subject: Re: john deere g Reply to specific post Reply with quote

power block pistons are taperd at the top are you cutting the hole top of the piston or just putting a taper on the edge like a power block piston
 
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2-banger
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PostPosted: Fri Sep 13, 2013 6:42 am    Post subject: Re: john deere g Reply to specific post Reply with quote

i had edge on piston cut with a taper like it was.getting close to top ring thou...i thought about block spacer..iam afraid it will draw too much attention..iam not sure if top ring gets as high as plug i will check that out tonight
 
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clampdaddy
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PostPosted: Fri Sep 13, 2013 10:19 am    Post subject: Re: john deere g Reply to specific post Reply with quote

2-banger wrote:
(quoted from post at 15:42:52 09/13/13) i had edge on piston cut with a taper like it was.getting close to top ring thou...i thought about block spacer..iam afraid it will draw too much attention..iam not sure if top ring gets as high as plug i will check that out tonight
If the ring is still below the spark plug at tdc you should have a lot of meat to work with, if the ring passes the plug hole the you have other problems to worry about.
 
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