Cylinders

[Craig Edmonds <cedmonds@dundee.net>]

Hi,

 I am overhauling the TR4 engine from my '63 Morgan +4, and about 3/8"
down from the top on the inside of each cylinder is a slight ridge. (
about .002" )
 It's position coincides with the lip on the outside of each cylinder,
so I'm curious if the cylinders were manufactured this way, or if it is
a ridge which requires reaming out?

 Regards,

           -Craig Edmonds

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