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Old 10-14-2010, 07:10 PM   #1
Bad Noodle
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Default Manley piston rings - which way is up?

Sounds dumb, but the instruction give direction for piston rings with a beveled inner edge or a dot. My top ring only has a beveled outer edge... does anyone know which way it should be installed?
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Last edited by Bad Noodle; 10-15-2010 at 06:43 AM.
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Old 10-15-2010, 06:44 AM   #2
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morning bump
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Old 10-15-2010, 08:54 AM   #3
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Dont quote me on this....

edit:

SEE EDIT POST #6

Last edited by xrocket21; 10-16-2010 at 01:10 PM.
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Old 10-15-2010, 11:44 AM   #4
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Bevel down
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Old 10-15-2010, 01:56 PM   #5
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Cool, thanks
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Old 10-16-2010, 01:10 PM   #6
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WAIT

we were wrong

in my CP piston "installation specification sheet" it shows the bevel goes toward the head, and the flat part goes toward the crankcase!!!!

http://www.cp-carrillo.com/LinkClick...Ls%3D&tabid=83
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Old 10-16-2010, 09:04 PM   #7
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I think that illustration is for the second ring rather than the top ring. S oif the top ring is beveled down, I would think that it would created a better seal with the combustion chamber. If the second ring is beveled up, then the square edge would scrape off any oil that gets past theoil ring. What do you guys think?

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Originally Posted by xrocket21 View Post
WAIT

we were wrong

in my CP piston "installation specification sheet" it shows the bevel goes toward the head, and the flat part goes toward the crankcase!!!!

http://www.cp-carrillo.com/LinkClick...Ls%3D&tabid=83
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Old 10-17-2010, 10:35 AM   #8
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Here's the best pic I can get of the piston ring profile:



What do you guys think?

Last edited by Bad Noodle; 10-17-2010 at 10:51 AM.
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Old 10-18-2010, 09:43 AM   #9
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bump anyone? It looks like they could be installed either way
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Old 10-18-2010, 10:29 AM   #10
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^^^ atleast in the pic it looks like top and bottom outside edges are beveled.
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Old 10-18-2010, 05:24 PM   #11
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Quote:
Originally Posted by rexworx View Post
^^^ atleast in the pic it looks like top and bottom outside edges are beveled.
+1, try a macro setting on your camera for a better shot.
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Old 10-18-2010, 06:56 PM   #12
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Here's the best i could do:





I also called manley and they said if there are no markings, they can go either way
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Old 10-19-2010, 08:17 AM   #13
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I dont even see a bevel on that ring
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Old 10-19-2010, 11:10 AM   #14
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Quote:
Originally Posted by xrocket21 View Post
I dont even see a bevel on that ring
There really isn't. The first ring I worked gave off more of a reflection from the chrome liner on one side than the other so I assumed that was form it being beveled. I couldn't tell the difference between sides in the rest of the rings.
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Old 10-19-2010, 12:14 PM   #15
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If there is a dot on either ring, they face up. If there are no markings, the bevel goes up on the top ring and the bevel goes down on the second ring. Hope that helps.

Regards,

JJ
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Old 10-20-2010, 09:44 PM   #16
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Default Manley Rings

Sorry I didn't see this sooner, JJ is correct If they have dots , dot goes up.
No dots, Bevel Up on Top ring, Bevel down on bottom ring.


RPG
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Old 10-21-2010, 06:44 AM   #17
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What if there is no dot? I know it can be hard to see especially with the matte black surface. That was the case with the second ring. So I took a sharpie and colored the top of the ring and the dot showed up no prob. Did the same thing for the top ring, and still no dot. Looked at it against the light and it was smooth, no indented dot.
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Old 06-27-2011, 02:55 AM   #18
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The Manley's first and second rings have no bevels in the outer edge (cylinder wall) but has slight bevel in inner edges (piston ring groove)

The second ring (matte black, cast) has a dot marked so it is looking up.

But what about the top ring ? It has no markings but has a bevel in the inner edge. Should it be looking up or down ?

Also why didn't Manley put bevels in the outer edges ?

This is the first ring, you can see the inner bevel :


This is the dot on the second ring:
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Old 06-28-2011, 06:50 PM   #19
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call total seal in phx az they supply the rings they would know the answer.
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