Vetal

iTrader: (3)

I'm doing quick refresh on my motor and noticed that my oil rail support rings DO overlap on the pistons. I watched Probe Industries video where they say there is dimple to prevent support rail from rotating, and that ends should not overlap, but I don't have any dimples. Looks like rail support is prevented from rotating by overlapping ends in the pin hole.
Is this even possible?? I was ready to file it down so it would have gap, but I couldn't find any dimples that would lock the support in place

Tomis

I am not an expert, but it looks that you oil support ring is for much bigger bore. You can just file it down. They are made like a springs, so they will stay tight to the inner wall of piston ring groove to prevent them rubbing on cylinder wall, check if the sit tight and do not move around in the grove. If they do , filling down will not solve you problem, you just need a new rings, looks like that somebody used wrong/bigger bore support rings.. And you there should be dimples, but not in the place where they are cut split, they should be around 90 degree from the split.

Vetal

iTrader: (3)

Yes there should be dimple but there is none. If I file it down so ends don't overlap, it will provide zero oil rail support

Vetal

iTrader: (3)

OK I "played" with the rings of my Probe pistons a bit more. Here are 2 pics.
First with overlapped support, in that way all oil rings get jammed quite a bit by bent support ring.
Then I connected support "butt to butt" (second picture). Of course, oil rings move much better, but in this "position" support rail does not "hug" piston and naturally spins very easy cause there's no friction.
What should I do? HELP!!

KCS

iTrader: (20)

Who made the rings? Call them. That simple.

Vetal

iTrader: (3)

I have no idea unfortunately

Vetal

iTrader: (3)

Found this thread where they say support shouldn't really rotate even without dimples/detents/etc.
http://speedtalk.com/forum/viewtopic.php?f=1&t=29386

A.R. Shale Targa

iTrader: (2)

Again those support rails are just plain wrong...end of discussion !!!!!!
They aren't a different design or something new or whatever. If you don't
know who made them and they were in the motor overlapped like that then
obviously whoever assembled it didn't know or care but clearlt the oil rings
were rendered useless due to improper seizing from the pressure. You will
have to grind or cut them to have a gap so they don't butt end to end and
then you'll need to use a pointed punch to create a small divet to prevent
them from rotating.

KCS

iTrader: (20)

Who makes the piston? They should be able to get you an answer on the rings.

Vetal

iTrader: (3)

KCS, pistons are Probe
A.R., that's what I'm leaning to. Although I'm starting to think that even if they rotate until one end jams against pin hole, nothing bad will happen (except weaker oil rails support in pin area)

KCS

iTrader: (20)

Probe uses Perfect Circle ring sets, yours are probably PN 315-0037 and the rails would be PN 14233.

Vetal

iTrader: (3)

Somehow I couldn't find anything on PN 14233, so no instructions on how to install them...

Vetal

iTrader: (3)

I "filed" down one support with a grinder. I have oil "windows" in my pistons but still support doesn't grab them and rotate freely enough. Hope that this won't cause any problems.

Vetal

iTrader: (3)

I was unlucky enough to break one of the rings on one piston (2nd compression). Is it possible to obtain just one 1.5mm ring, or a set for 1 cylinder, but not for all 8?