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Crank journal rust...
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Posted by Gary on September 24, 2000 at 21:06:54 from (209.143.16.162):
I am gradually restoring a '51 MM U. It was partially torn down for an (unfinished) engine rebuild and sat for several years inside of a shop. I am currently debating on reassembling things stock vs. building a larger displacement tractor pulling engine. I have like new .030 over pistons, stock bore jugs with machine marks on cylinder walls, etc. My concern lies with the crankshaft which is still installed. It rotates freely and has a nice coating of grease, but the rod journals are rusted in some areas (the rods were removed). I know there are variables to consider, but I don't know how deep the rust is. My question is, after the rust is removed how much pitting can I get by with? Would it be wise to use a chemical rust remover first rather than going with something abrasive? I realize that if too much material is removed that my rod bearings will be too large, but shouldn't I be able to get by with some polishing? It would be considerably cheaper and more practical to put things back stock. My only machine work should be boring the jugs to .030 over/honing. Since this is a 283A engine, the jugs can be taken to the machinist separatley. If I have to remove the crank for grinding I might as well go for a "G" crank, etc which would be much more costly and further down the road timewise. Thanks in advance for any help.
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