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B piston rings
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OldEvo View Drop Down
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Joined: 05 Feb 2017
Location: Virginia
Points: 12 		Post Options Post Options   Thanks (0) Thanks(0)   Quote OldEvo Quote  Post ReplyReply Direct Link To This Post Topic: B piston rings
    Posted: 15 Feb 2021 at 5:26pm
Today I installed the rings I bought 5 years ago for my '48 B.  With a measured bore of .379 I have an end gap of over .035.  Does someone make rings for a small overbore that I could file to fit?

Thanks
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 87710 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 15 Feb 2021 at 7:15pm
your original bore was 3.375 inch so you are looking for rings that fit 3.385 ( or .010 over) that you can file.... Im not sure there are rings listed for "ALLIS" as most people will bore to the 3-7/16 oversize with new pistons and rings..... There are other engines that have 3.385 inch bore rings if you want to check them out... also note some are cast, some are chrome, some are 1/8 thick , some a 3/32 inch thick..... GOOD LUCK.
Like them all, but love the "B"s.
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
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Points: 87710 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 15 Feb 2021 at 7:24pm
put a standard ring in the bore 1/4 inch down from the top and measure end gap... then push it down 2 inches and measure again.. If the bore is tapered, you might PINCH the ring at the bottom when it fits good at the top... That can be a problem.. You can HONE the cylinder to get the bottom a little bigger if you really want to go this way.. Use a proper hone to get straight cut.
Like them all, but love the "B"s.
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