Piston Ring End Gap Grinders

[Vore667]

For oversize you have to HONE the cylinder and buy new pistons dumbass. You do not need new pistons and honing if bores and pistons are ok. You just need longer rings and file them to specified gap.

[Vore667]

BUT if I am to rebuild an used engine where I do NOT know how much cylinder bore has grinded off (and is thus WIDER than new) during time of operation, than those same new factory rings will give wider gaps since they are made to meet bore size of new cylinder, not used one. It will work, but not as it is suposed to. Beter solution in that situation is to buy oversize rings and file them to specified gap which is not possible with new factory rings since they are too short.

[Vore667]

I knew you were stupid. Nevermind, I'll try and explain. New cylinder dimensions are very close to EXACT, so are new pistons. So to recap: New bores and pistons are built to specified dimensions. So if I go and buy new rings for new pistons and bores, this combination will produce perfect factory specified ring gap. This is super logical because we know all the dimensions.

[ted850760]

Piston ring end gap varies ,bore size,piston type[forged al.,cast,silicon based,billet....one size end gap 'Dose not fit all'...nice machine sir....

[brettwill87]

by a wiseco piston kit you never need to file the piston ring gap their always spot on

[565Customz]

@brettwill87 ...um..have you ever built a motor??? lol.

[Kerrod99]

@brettwill87 um you always need to check the ring end gap and 99.9% of the time they need filing because of many factors

[dodgecbr02]

i'm sure that federal mogul has better end gap grinders...they have been making piston rings longer than any one else in the market..sry to knock you off your high horse

[DREYFUS11]

Do you think this toy is used by Mahle to manuacture piston rings?? I guess you do not know what is the real Mahle's technology.....

[Vore667]

@DREYFUS11 with new cylinder and pistons it is no big deal for new rings to have gaps inside tolerances, but when you put new rings in used motor, cylinder is no longer new. So for this reason one buys bigger rings and file them down to specification. Can you understand that or are you just dumb?

[DREYFUS11]

@Vore667 I would like to know the comments from an automotive manufacturer (Ford, GM, Audi, Nissan, Toyota, etc) if you tell them the gap size in a new engine is not a big deal... Wow!! Blowby and oil consumption as a first instance we would be getting in a "new" engine if the gap is not into spec...

[DREYFUS11]

@Vore667 And of course, for used engines, you never have to use Standard Sizes, you must use Oversizes (C in the most of the cases), but if you grind by hand the working gap after you buy piston ring set, my friend, I just guess you do not know what you are sying. Good luck!

[v8packard]

You do not understand the intended use of this machine, and you are mistaken about the history of Federal Mogul. This machine is by far the best available for it's intended use, which is the precise adjustment of piston ring end gaps for a particular bore size.