streetknight2

iTrader: (10)

I've spoken to Wiseco. They want me to send the stuff in for them to look at. I was very nice and not upset on the phone. I didn't expect them to even talk to me about it, so it's cool they wanna look into it.

The oil ring material is VERY brittle compared to stock oil rings (those are the only other oil rings I had lying around the shop) snaps right off.

I've taken it to 3 different machine shops and everyone that's looked says they've never seen anything like it. I hope that means they will look into it.

I don't want this to be a flame Wiseco or anyone else thread, just seeing if anyone else has had an issue and mchicia1 has.

Maybe something could be done, if not I guess my plans for the racing season are done lol.

badazz81z28

iTrader: (6)

There are more variables besides being properly assembled. OP stated he broke the engine in and took it to the track. Did he do proper break in procedures? Did he overheat them? Inadequate lubrication etc..etc...

Not to bash the original post because something went wrong and at least Wiseco is offering to look into it, but last time I checked, race parts are not covered under any warranty. There is no sure way to determine fault and I think it's a little pre-mature to blame Wiseco.

HarshReality

Machinist error during boring. The cylinder walls are tapered you can tell from the piston skirt wear pattern. The bottom of the bore is tighter than the top of the bore thus giving you this wear pattern. This is due to machinist/engine builder. A simple bore dial gauge before and after final hone would have caught this fatal flaw. You have broken rings because most rings are ductile iron/brittle. As the piston goes thru the motion of combustion the tapered bores at tighter at the bottom in your case "breaks rings."

It sucks but this what happen and it was preventable. Live and learn

RockinWs6

Measure the bores and post your results. I built ALOT of engines and never seen anything like this..........

mchicia1

iTrader: (5)

The rings seat within the first few miles. A couple moderate load pulls with engine braking seats them very quickly. He could have taken it to the track right after he assembled it if he wanted to.

Nothing to do with break in here.

ss4chad

iTrader: (26)

Good luck finding the problem. I just built my motor and it has not fired as of yet. I used Diamond Pistons but I forgot what rings we used. I had to grind them to tolerance, hope I did it right!

Let us know what you learn about the failure.

Chad

ckpitt55

iTrader: (4)

Were they the Total Seal plasma moly file-to-fit rings? That's what I ordered with mine.

Daniel0026

Im curious to see what your bore measurements turn out to be. Keep us updated!

Installing my wisecos soon...

streetknight2

iTrader: (10)

I will post info when I get block to machine shop.

FWIW this was a standard bore engine. Wasn't bored.

The skirt damage appears to be from the broken ring fragments. Cylinder walls have some nasty ridges.

HarshReality

If this engine was stock bored untouched. No final hone for 2618 pistons. That is machinist/builder error. Your 2618 pistons expanded with no room from clearance they binded up. And cause this damage.... you cannot put 2618 pistons in stock bored block and not expect have total damage. you have to finish hone the block for the correct pistons. (2618) pistons expanded alot.

The taper is tighter in the bottom of a stock block than in the top.

RockinWs6

That's what I figured....I call BS on the tapered bore crapola!

HarshReality

Dude I'm the michael jordan of building these types of engines.. Any machinist will tell you that cylinder bores have taper. Even those 2618 pistons have a taper brand new that is intentionally there.

I feel bad for the guy. But a dial bore gauge is a must when dealing with 2618 pistons.

streetknight2

iTrader: (10)

I picked engine up from machine shop..they had parts and said it was ready to pick up. I'm gonna take it to another shop to be checked.

Daniel0026

"Dude I'm the michael jordan of building these types of engines.. "

Really?! You mean like this Michael Jordan?

HarshReality

precisely

RockinWs6

I aint buyin what yer selling dood.....................Its clear from the pictures the rings failed.

HarshReality

You don't have to buy what i'm selling. The piston skirt aka piston body sets the clearence in the of the piston to wall clearance. So it doesn't matter if u agree or not,or buy it, or not. The piston expanded in the skirt and wore heavily first. The wear of the piston coating says the same and tells the same story. The rings fail when they binded up in the bottom of the bore due to the taper.


You can't break piston rings unless the bore is out of round. And out of round is TAPER.


You're welcome.

RockinWs6

Sorry but you're wrong. The pistons are tapered....but the bores are NOT. I think you need to go back to high school jr.

RockinWs6

by the way I'm the Jimi Hendrix of building motors!

And look at the middle of the piston.......not even touched! Bottom and top are destroyed! Your diagnoses is so far wrong you are playing with dolls not basketball.

HarshReality

Listen Helen Keller I am NOT going to keep going back and forth with you on this alright. Those pistons are expanded at the bottom first the wear is severe at the bottom of the skirt. As the piston expand more and more the rings binded in the bottom of the bore. PISTONS AND BORES ARE TAPERED NOT JUST PISTONS. This is why a dial bore gauge is a must. But anyone can tell you CYLINDER BORES ARE TAPERED AS WELL. Which is why you measure each piston and assign it to a bore after you have measured the bore with a dial indicator. Bores have TAPER and So do pistons Jimi Hendrix... now put down that booger sugar and concur with MJ.

Now let's wait for the results from the guy who has this problem. And we will see who's correct.