Milling a jug?

[mholub]

Well i was going to bolt it back on and with the plugs out turn the engine to make sure the the piston didnt hit.

[mholub]

I will post the results when I get done. Thanks to all for the advice.

[mholub]

Whay type of devcon epoxy would be best to use?

[Larry's Shee]

https://www.google.com/webhp?sourceid=navclient&ie=UTF-8#hl=en&tbo=d&sclient=psy-ab&q=two+stroke+squish+testing&oq=Two+stroke+squish+test&gs_l=hp.1.0.33i21.0.0.2.11740.0.0.0.0.0.0.0.0..0.0.les%3B..0.0...1c..2.hp.ZJV0TvPX5Nk&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.42261806,d.b2U&fp=6dd38a3c34f677a9&biw=1024&bih=544

[camatv]

is this a cheetah or a cub?  if its cheeta the o-ring seals are in the cylinder?  if its cub shouldnt be to bad..

[mholub]

It has the oring seals between the domes and cylinder. There is a groove that the o rings sit in on top of the cylinder.

[Nieskes]

This will work http://www.fastenal.com/web/products/detail.ex?sku=0682574, jb weld will probebly we good enough also.

[sleeper06]

Big fan of marine-trek,but normally I use granite with multiple grits of sand paper starting heavy and finishing up at 600 do figure 8s till mark is gone,check swish,adjust base gasket if needed,I have done it multiple times with no problems this way

[mholub]

So upon further investigation, I can remove the dent by machining about 9 thousanths of an inch off of the top of the cylinder.  I feel like that is a better/easier fix than trying to fill it with epoxy or welding on it since I have access to the equipment and a machinist willing to do it for me.  There is an o-ring that sits in a groove on top of the cylinder that the domes seat into.  That groove would be shallower by that amount.  Does anyone see a problem with that sealing properly if I do that?

[sprinklerman]

So you are ignoring the safer method that was proposed to you in favor of what you had already decided to do,,,didn't provide any pictures of the damage,and are willing to run the risk of damaging your nicasil ?

 

 Here>  http://www.engineering.com/Library/ArticlesPage/tabid/85/ArticleID/132/O-rings.aspx

http://www.allorings.com/oring_groove_design.htm

[mholub]

 

 So you are ignoring the safer method that was proposed to you in favor of what you had already decided to do,,,didn't provide any pictures of the damage,and are willing to run the risk of damaging your nicasil ?

 

Ya, I see your point.  I sent the cylinders with the guy that has the equipment before I had a chance to get pictures so that's why I have not posted any.  I might be able to get him take a couple and send them to me.  Either way, it sounds like the epoxy method has a proven track record so I will stick with that.  Thanks for helping me realize why I asked for suggestions in the first place.

[sprinklerman]

No problem man. But it would be very helpful to get some pictures.  Maybe someone else has some ideas?

[Starwriter]

Maybe I'm not getting it, but how can it leak water from gravity, if the dents aren't where the O ring actually seals? (bottom of the groove in the cylinder and the head surface)