Oil control ring

[Cjhammarstrom]

Hello i bought new rings an got this single one instead of the 3 peace ring set.
What do you say about this one?

20200204_123435.jpg

[m3a1]

Don't know all there is to know about these but I DO know that when multiple rings are used separately, the general rule is the points at which individual rings are split must not line up with the split of any other adjacent ring. So, if were you able to use that ring solo you're looking at a split with no way to mitigate blow-by. What is that ring's application?

Cheers,
TJ

[rickf]

I have seen them but never used them. I kind of have mixed feelings about them since they are going to leave a gap unless you file them very precisely. Considering that it is an oil control ring and not a compression ring I don't think the gap position is as critical but I would space it at 45 degrees from the compression rings just for general principal. The gap is the part that bothers me as oil is going to get by there. Probably not enough to make any difference at all and it may even help lube the cylinder since it is below the compression rings but I don't know. I am old school. It must work or they would not be selling them is all I can say, whose rings are they?

[m3a1]

On closer inspection, I see that the gap face is keyed, rather than flat.

[rickf]

Looks pretty flat to me other than the profile of the ring ridges. And if it was keyed it could not conform to the cylinder, it would be locked together around the piston. The ring gap will be larger when cold than it is hot so the ring also can't be keyed together in any way.

[Mr. Recovery]

They are used on a lot of motor cycles and should still have a spring behind them in the piston groove.

https://www.bing.com/images/search?q=on ... &FORM=IGRE

[m3a1]

They are used on a lot of motor cycles and should still have a spring behind them in the piston groove.

https://www.bing.com/images/search?q=on ... &FORM=IGRE

Yep. Flat. I see it now.

[Cjhammarstrom]

I bought a ring set for my Mutt and this is what i got.
For example my old oil rings messure up to 0.055 inch of a gap.
This one have a gap of 0.007 inch.

[rickf]

Oil rings generally have two wipers and an expander. The wipers will have a gap which is offset just like the compression rings and the expander links together as one continuous ring all the way around. So technically the old style oil control rings would not have much of a gap at all but the one you are showing has the one gap with no overlap, again, it is an oil ring and not a compression ring so this probably does not matter all that much. .007 is a pretty tight gap, was that measured at the top or bottom of the bore? Again, I have never worked with these so I don't know the specs, that should have come with them. You do need to have oil on the piston walls, that is what these rings do, they "control" the oil which comes out through holes in the piston in that gap in the center of the ring.

[svramselaar]

hi

i use them also at my rebould engine
it is only a other factory
if the gap is not to big it are good rings
the ones with the expander ring inside are mostly used at worn cylinders
at the box from my new pistons stand cadillac not a ford produckt

https://www.rlengines.com/tech/Common_Ring_Types.pdf
george

[Cjhammarstrom]

hi

i use them also at my rebould engine
it is only a other factory
if the gap is not to big it are good rings
the ones with the expander ring inside are mostly used at worn cylinders
at the box from my new pistons stand cadillac not a ford produckt

https://www.rlengines.com/tech/Common_Ring_Types.pdf
george

I see do you know how much gap there should be?

[svramselaar]

hi

this is standing at my book

gap
compression ring no 1 top .010-.027
compressionring no 2 center .010-027
oilring no 3 bottom .015-.062

clearance between ring and piston

groove no 1 .002-.0035
groove no 2 .0015-.0035
groove no 3 snug

width of ring groove top no 1 .0955 -.0965
groove center no 2 .0955-.0965
groove bottom no 3 .188 -.189


george

[Cjhammarstrom]

Ever heard about King bearings?
Piece of crap?

FB_IMG_1589270116523.jpg

FB_IMG_1589270122376.jpg

[svramselaar]

hi

if i google it this came out http://www.kingbearings.com/
they make also aviation bearings so it must be tested

george