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Five Piece Piston Oil Ring

K

KCTractors

Member
Location
Central Wi
Got a set of sleeves,pistons and rings from a closed dealership. My question is the oil ring has five pieces to it, how do you install this on the piston? It consists of a normal looking oil ring, two spacers for top and bottom of oil ring, one thin ring the width of piston grove ( very flex-able), and one the width of the groove with continuous like s-curves the diameter of the piston groove. I bought these maybe ten, twelve years ago and have no direction , so how would I install the oil ring in the piston? Talked to a mechanic and he said he never seen anything like that. He said to just use the s-curved ring and the oil ring with top and bottom spacer.
What do you guys think?
 
The three pieces go in the bottom groove. Wide s shaped as you call it goes on first. 2 thin ones go on next. One on the top of it and one on the bottom of it. Do not line up gaps or you will have a lot of blow by. Those three pieces stop oil from getting in to the combustion chamber. Single rings almost as wide as groove go in the top two. If you look at the wide one you see it is a little wider where it wraps around the piston. The two thin ones hold it one and it in turn holds the wipers against cylinder wall. None of the gaps should be lined up. Pip marks (indents) on compression rings face top of piston. I'm sure there is some YouTube on this. Also hastings has directions with pics.
 
No instructions, that is always fun. I would have to see them to suggest how to install them for sure. May be you use one or the other flexible or s curved depending on wear of cylinder or could depend on depth of the ring groove and have to use both. Hard to say from here. We used to get some oil rings with different expanders for new cylinder or just ringing and engine..
 
KCTractors:

Strongly recommend that you go to Wikipedia and type in "Piston Rings". You'll find your answers there, better than I could explain it.
 
i sold M&W for years, never saw any rings like that in any kit. i did get some like that in a set of McQuy -Norris i did install them but engine was so tight that i took them back and never used that style again
 
If i can remember to do it, I have a set of M&W pistons at home that still has the rings on it. I will look and see if it has that style of ring and post a pic if it does.
 
Maybe some pictures of the oil-rings.
a138648.jpg
 

I'd put the thin one on at the bottom of the groove, then the flat one, the wavy one, the u-shaped one, then the last thin one at the top of the groove.
 
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