View single post by jonseeley
 Posted: 09-22-2006 06:02 pm
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jonseeley

 

Joined: 06-10-2006
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 I had the same problem with a 907 engine. It was time to freshen up the engine so after dissassembley I miked the main bores with a one ten thousands bore gague and found that the main bores were eliptical.

I worked part time at an auto machine shop so I had access to the tools. I decked the main girdle about .005", then bolted it up and put the block and girdle in a align boring machine. I trued up the bores and the problem went away.

It is an expensive fix but since then I have found two other 907 engines with similar problems. I do not know if the fault is in poor machine work at the factory or whether the soft girdle gets pounded out of round.

 

Jon Seeley