Re: Re: Re: 1949 Farmall Cub

Posted by Kevin on June 03, 2002 at 11:34:52 from (208.230.117.44):

In Reply to: Re: Re: 1949 Farmall Cub posted by Larry Bate on May 29, 2002 at 17:46:21:

Hi, me again,
Cylinders get the most wear at the top, due to combustion, heat, not enough lubrication, etc.
As the cylinder becomes worn, it takes on a funnel sort of shape, wider at the top, narrow at the bottom. For new rings and pistons to work right, the cylinder must be a perfect tube, same diameter at the top as the bottom. An inside micrometer can be used to check this. A quick check is to do a cylinder leak down and or compression test. If you take the head off, there will be a ridge at the top of the bore. If you scrape off the carbon and you can't feel the ridge any more you might not have to have the engine bored out. I think you will need to have an experienced mechanic help you out. This kind of work isn't terribly difficult, but you have to have the measurements correct, and every thing has to be very clean upon reassembly. I would suggest that you start reading up on the subject. Good luck, have fun.

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