Major Problem With My Overhaul Guys

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When I was installing the piston #3 into the bore with the ring compressor, one of the oil rails from the oil ring caught on the edge and bent out the side.

So I removed the rail from the land, and tried to flatten it on a vice, it seems to flatten OK. There's a little nick in the chrome of the oil rail, very tiny, it's indented not protruding.

When I put that rail back on (of the 3 part oil ring), corner where the ring gap is sticks far out, kind of like brand new top and 2nd rings, when they stick out. Worse off, without touching it & uncompressed, it sticks right out the land.

At this point I've run out of time and there's no way I can wait 2 weeks to order a 2nd piston ring set, so I tried installing it back in. The oil ring seemed to compress like the top & 2nd ring and it went into the bore. Now I don't know if it pried to the side or not I can't see it, but the whole crankshaft turned smooth, and I didn't see any streaks in the oil on the side, or any abnormal sound.

Questions:

a) What will happend if that oil rail scrapes on the bore more than it usually does. Will it seat over time from the heat and use? It's the top rail by the way that got damaged, the one next to the 2nd ring.
b) Will it quickly wear down the bore or the thin rail, because of the scraping action.
c) Should I re-ring it AGAIN next summer (I really don't want to do this, this would entail buying new head gaskets and intake gaskets and that [censored] of a job of sealing the oil pan again)
d) I'm just going to leave it as is, and hope for the best. What can I find as a clue if it did pry out of the land and scrapes on the bore - would I hear it when I turn the cranshaft by hand looking at the internals. My suspicion is if part of the rail prys out, the whole ring might tear off eventually - how do you see those rails failing if possible in my scenario? Will it get chewed up in the crankshaft or end up near my oil pump. It can't get past the pickup screen I think.

It's too bad this happened - but there's no way I'm waiting anymore - a boat needs to be moved out of the driveway and my car is blocking it. This overhaul has become deadly it costs WAY OVER BUDGET in the end, but it was a fun experience. Would I do it again? Iffy. Maybe it would be smooth sailing if I did another one.

Final pics to come soon. Thanks Everyone for the help - i'm almost done. I was working in +3 C weather today. No wind, but winters coming fast so I want it assembled by SUN.
 
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Please don't use that.Its quite possibly a catastrophe waiting to happen.Ring tension is important for normal bore sealing/oil control and wear,that ring could possibly snap and tear the cylinder up.
 
Do not use that ring... Get a new one... Others are right, why leave this rebuilt hanging on this one part that could possibly write it all off?
shocked2.gif
 
If you enjoy the engine R&R process, and enjoy buying expensive rebuild parts such as gasket kits and head bolts then I say go ahead and reuse that questionable $15 part. Don't forget the fun and expense of the catalytic converter you may get to replace because you were pumping oil into the exhaust.

got for it
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Good news is I think I can get a new set by TUES, I called Part Source. Question though, it will be OK to use 1 oil ring assembly different brand from the other 5 right?

All the other cylinders are done already, and i'd like to avoid re-ringing those again.
 
You will be fine... We have done that before in the rebuilds Dad & I do and it never was a problem.

Might have slightly different wear rates further down the road but nothing else.
 
The good news is that you found it and are aware of the problem!
This is huge!
You will regret not getting new parts.
Like mentioned, even the old used one is a better choice.
 
Originally Posted By: 1993_VG30E_GXE
Heres a joke for you. Dealer wants $232.09 for the ring set. I paid $28.00 US for the set with the broken ring.

I found a set at partsource for $90.00
When we rebuild engines we go to AZ or AAP in the US and get all our parts there... They always have what we need and at a way better price. I buy virtually nothing at CTC or PS. here... They suck big time!
 
Ya, I just sucked up the cost and ordered it. There's no way I'm going to waste all that money and time on a hundred bucks. The whole overhaul could have been a complete waste if a left it in there. And surely enough, when I removed the oil rail the 2nd time and looked at it, it wasn't round anymore. It got bent out of shape and ended up lop sided.

I pulled out the other pistons just to check that they were OK (#1 & #2) and they were fine. A friend of mine said when the shop honed it, if they didn't put a chamfer on the edge, this MAY have led to the problem. I can say the edge is a sharp 90 degree angle. Either way all the rest of the pistons went in smoothly. So I'll just wait for that oil ring and replace it, then close it up.

In the mean time I'm replacing all the brake and fuel lines & steering rack, last night I did the rear calipers and rotors.
 
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You are making the right decision with not using the bad ring. Good luck on the project. The last two vehicles I replaced the engines with wrecking yard ones. I know it's a gamble, but they do have some guarantee.
I have rebuilt a fair amount of engines in the past.
 
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