[SEL] Piston Ring Gap

[guitronics]

I'd use a "Bottle Washer" type of hone,much simpler and easier to use 
than the standard "Stone"type.

Luke Tonneberger wrote:

> Hi Rupert,
>
> I have plenty of WD-40 so that is what I'll use for lube. The piston 
> does fit in the bore but barely. I don't want to force it.  I have 
> just finished boring out the cylinder, but haven't honed yet. I'll 
> hone as little as possible to remove the boring/tooling marks then 
> file my rings to get the necessary gap (as was suggested off list).  
> Thanks everyone.
>
> Luke Tonneberger
> Rockford, Michigan
> USA
> ===============
>
>> From: Rupert Wenig <rwenig at telus.net>
>>
>> Hello Luke,
>>     Are you saying the piston already fits the cylinder bore? If so, 
>> then simply file the ends of the rings to get proper end gap 
>> clearance. Piston to cylinder wall clearance and the ring end gap are 
>> determined by the diameter of the bore and the temperature the engine 
>> operates at. It's been a long time since I've had to know this so any 
>> tables I have are buried deep.
>>
>>     Kerosene is recommended in my books to use as a lubricant when 
>> cutting aluminum but I prefer to use WD40.
>>
>> Rupert
>>
>> Luke Tonneberger wrote:
>>
>>> Hi Jack,
>>>
>>> It is air cooled with an aluminum piston. It is for a model I'm 
>>> attempting to make. I have the bore close to finish size. The piston 
>>> fits, but the rings don't fit yet.  I put in a piston ring and can't 
>>> quite get the ends to meet. The bore is too small yet so the ends of 
>>> the ring overlap a bit. I need to hone it out about .015 inches I'm 
>>> guessing. I'm using the end gap on the rings to determine what my 
>>> finished bore size will need to be and how much I'll need to hone 
>>> it. I've read a little on how to hone, but not sure what to use for 
>>> cutting fluid.
>>>
>>> Luke Tonneberger
>>> Rockford, Michigan
>>> USA
>>
>
>
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