Ring end gap too tight

[merc_man]

Working on my ms260 and i thr ring end gap on both ring are pretty tight.
I was thinking they should be around .012"
If my number is wrong please correct me lol. Also what is the best way to shorten them? I have never had to shorten them befor.

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[cus_deluxe]

Seems like i remember .004/inch of bore? I have a little set of needle files, i use the flat one out of that set to file the ends.

 

[merc_man]

Ok so inwas thinking too big a gap then.
Just checked and a .004" feeler guage will fit. So should be good then?

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[Canadian farm boy]

Seems like i remember .004/inch of bore? I have a little set of needle files, i use the flat one out of that set to file the ends.

This is what go with.

Ok so inwas thinking too big a gap then.
Just checked and a .004" feeler guage will fit. So should be good then?

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I’d want at least .006” but would feel better with .008”

 

[Canadian farm boy]

Be sure to check ring gap in several different positions within the cylinder where the ring rides.
Use the piston to slide the ring up in the cylinder and to square the ring in the bore.
Don’t push the ring up tight to the squish band or it will be a B to get back out

 

[merc_man]

This is what go with.

I’d want at least .006” but would feel better with .008”

I can fit the .007 pretty good. The .008 starts to get snug

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[Canadian farm boy]

I can fit the .007 pretty good. The .008 starts to get snug

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Sounds safe to me.

 

[merc_man]

Thanks for the help everyone.

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[heimannm]

If you ever need to file the ring ends just clamp a flat file in your vice and drag the ring down the file keeping the ends square. Recheck the gap every stroke as there is no going back...

In the old days they actually made a hand cranked tool like a cross between a table saw and a disk grinder to do that, most shops that did a lot of overhauls had one, many schools did too.

Total Seal Piston Rings RF001 Total Seal Piston Ring Filers | Summit Racing

Mark

 

[Lee H]

Does the piston have ring locating pins, if so you will have to take that
into consideration. I'm doing a Mac Super 797 with locating pins and
the ring end gap i set at .060 to .062