Back in the days of my youth, an engine job required the rental of a "ridge
reamer" and "deglaser". The first was a tool that reamed away the ridge
left at the top of the bore above the highest point the top ring ever
reached. the "deglaser" put enough texture on the cylinder wall to seat the
new rings. If you weren't carefull to remove the ridge, you would almost
certainly break your top ring sometime early in the new motor's break in period.
Regards,
Glen Byrns
'59 Bugeye
>Hi Bill,
>
>Are they grooves or ridges. Often where the rings stop on the upper end
>will leave a ridge. In my teen days they sold a deridge device that
>went around the top of the cylinder to remove this. It wasn't a
>cylinder hone but something else. Anyone on the list know about these?
>I would check for taper, if your cylinder is showing signs of taper then
>bore it out. BTW I would have the machine shop supply the pistons
>because you won't know whether it needs to be 10 or 20 over bored. If
>you show no signs of taper I would deream it to remove the ridge and
>call it good.
>
>Rick
>
>Bill Mantz wrote:
>>
>> It's dumb question time. The Midget is going to need to be bored. 1/4
>> inch from top of cylinder are some grooves. The dumg question is : I
>> understand the bore part, the new piston and ring part, but I'm clueless
>> about the sleeve. Catalogs list a (singular sleeve) for the motor. Are
>> we boring he existing sleeve, or are we replacing the sleeve with a
>> larger one. Sorry for such a stupid question, but, once again, I thnk
>> I'm confused.Sorry!!
>
>
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