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Oil control ring not fitting right
Topic Started: Apr 16 2011, 05:42 PM (2,008 Views)
Norby
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Hey all, I'm trying to fit the oil control rings but I'm stumped about the fitment. The ends of the oil control ring should butt together. What could be the problem? Is there something more I must do? I can see there is still some carbon buildup on the pistons. I'll keep working on that.

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Edit: these are standard size rings for a standard piston
Edited by Norby, Apr 16 2011, 05:42 PM.
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Good bye


It appears that you have the ring assembled wrong. The wavy part goes in first then the the two small wiper rings
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Norby
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What you see is only the wavy part, I have not yet installed the smaller wiper rings. That's what has me baffled.
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Norby
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I have a feeling somebody slipped the wrong oil control rings in the correct box. They don't match the old oil control rings anyways.
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Norby
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I took another pic... old oil control ring on the left, new on the right. Looks totally different right?

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Good bye


Yes but that can be ok. Is what I see in the first picture a round piece of wire that keeps the ends together? If so collapse the expander all the way and see if the ends meet.
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Norby
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I think I just figured it out. Per rockauto.com, the 2000 Metro 1.3 uses either:

1st ring/ 2nd ring/ Oil control
1.2/ 1.2/ 2.5
1.2/ 1.5/ 2.8

My 1.0 block has pistons that use the 1.2/1.2/2.5 ring set. No wonder the other set doesn't work well. Did someone in the past stick 1.3 pistons into the 1.0 block? Now I have to wonder what difference to expect in compression ratio..................mystery.
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Norby
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me and my metro
Apr 16 2011, 10:13 PM
Yes but that can be ok. Is what I see in the first picture a round piece of wire that keeps the ends together? If so collapse the expander all the way and see if the ends meet.
There is no way to collapse that wire ring. I could remove the wire but the oil control spacer will not fit the groove in the piston in any way.
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Good bye


AH, I see so the #2 compression ring is also probably too wide. There may be both ring widths used on 1.0 pistons also. The 1.3 pistons have valve reliefs I think.
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Murf 59
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I ran into a similar problem building #2 engine for the Dark Starr. Somewhere down the line. Funky pistons where install in my block. I had to go back and have the parts guy call the ring supplier and track it down by the dia. and thickness of the rings. It was a real pain in the backside. I would give you the part # but figured this was a one time only thing. Sorry
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95-3banger
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It's hard to tell from the pic what you had going on there. I guess the expander wouldn't even fit in the groove? I'm glad I didn't run into that, seems I always run into something weird on an engine build. Hope you can find the right rings without too much trouble (and wait).
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Murf 59
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For the ones I got the oil control ring would just barely fit into the groove as far as width. I think they finally figured out at the parts house that they fit a Honda piston. Might have been "left over's at the factory" We used to run into that all the time with the parts books for standard transmission's. The factory was out of the original's, and put something else in. Then failed to tell the guys who write the interchange books, about the substitution.
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Norby
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I concluded that the pistons are correct, but use the newer 1.2/1.2/2.5 rings. Got new rings on order from partsdinosaur.com.
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jellybean


As me and my metro posted it looks like the retaining ring is under the spring , installed first, or its an old one that didn't get removed. there is no ridge machined into the ring land its just a square cut
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