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Old 01-29-2013, 11:58 AM   #26
bddgsxr
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Update: New short block on its way! Yippie
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Old 01-31-2013, 10:40 AM   #27
fritzski
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i hope this story gets better from here on out. atleast subaru is standing by the warranty, i know that makes me feel better about my gr. i would like to see them just figure it out and recall all affected models, make it right and i would be a very loyal subie customer for life.
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Old 01-31-2013, 12:23 PM   #28
bddgsxr
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After talking with hundreds of people who are in or were in the same boat as me I am now almost certain that there is a problem in the casting of the block. Knowing that the original block has pooped out at least 2 pistons and the finding of the cylinder being out of round leads me to believe that it has been that way from day 1. I don't know much about the manufacturing process of the blocks but I'm assuming that they have way more than 1 mould that they use for the castings. Maybe? It seems to me that almost everyone who had the drop in piston fix either sells/trades the car, drives it like an old man in a Buick because they are afraid of it blowing up again or like me blows it up again and again til the block gets replaced. I refuse to own a car that I have to treat like a newborn baby. If I'm paying for it I'm going to drive it like I did that girl in Vegas I paid for. Just kidding... She didn't charge me! I really hope all of the bugs are worked out but I still have my extra motor waiting for the day my warranty expires.

The key to my new motor was an extremely knowledgeable parts(Max)/service(Brett) department. I will update with shop info once I get my car back. I will say for now that without this new dealership on the case I would have driven my car into the Atlantic ocean and chained myself to the wheel. I am still a bit frustrated with the build quality but my confidence in dealership customer service has been renewed.
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Old 01-31-2013, 01:52 PM   #29
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i would be curious to see if any aftermarket blocks that used a torque plate during the build have any cases of ringland problems, i would bet not.(hard to say as they all go forged though)
i wish i had the time and money to test a theory,torque plates+stock pistons, run it like its stolen and see what happens.cylinder distortion from the facory could be the real culprit, wouldnt take much to break a ringland with just the slightest extra friction on such a thin piece cast.
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Old 01-31-2013, 02:05 PM   #30
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Quote:
Originally Posted by fritzski View Post
i would be curious to see if any aftermarket blocks that used a torque plate during the build have any cases of ringland problems, i would bet not.(hard to say as they all go forged though)
i wish i had the time and money to test a theory,torque plates+stock pistons, run it like its stolen and see what happens.cylinder distortion from the facory could be the real culprit, wouldnt take much to break a ringland with just the slightest extra friction on such a thin piece cast.
I am convinced this is the case but I'm not a mechanical engineer and I don't know any more than the damn things break without any rhyme or reason. It seems reasonable because of the frequency in which it happens in #4 as compared to the rest.
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Old 01-31-2013, 07:05 PM   #31
kpluiten
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Why has no one asked about WHAT IS CAUSING THE FAILURE? And I bet it's not an oval cylinder. I bet you'll find something is causing a lean condition and/or detonation.

For years... really since the introduction of the EJ257/255, guys have been destroying ringlands, especially number 4. The cylinder seems more prone to it. While the piston design is pretty poor/fragile for a performance engine, most of the knowledgeable people around these cars agree that it's detonation that finally destroys these cars. Not an out-of-round cylinder.

Now the cause of the detonation is what the dealer should have looked into when it first happened, but they don't get paid any extra to do so. The main causes:

*Factory tune - there have been many guys who've shown the factory tune is just too aggressive for certain driving conditions/motors/fuel. Certain years are more affected by this.
*Aftermarket tune - there are a lot of bad one floating around and they wreck motors all day long. And people then blame Subaru
*Bad injector - causing lean condition
*Sharp point inside the combustion chamber resulting in detonation initiation points. I knew a kid with an 07 WRX that detonated so loudly, you could hear it while driving. It was BONE STOCK and did it since the day it was new. Roughness counter and det cans confirmed it was true detonation. Subaru tried to fix it with tune after tune from SOJ and never could. Car was totaled not long after, but the guy never boosted it because he was so worried about it. I'm convinced it was something inside the combustion chamber causing this like a casting defect.

I'm sure there are other sources too.


I also am totally surprised that they are only doing piston replacements now. Are sure on that? I've seen dozens of these cars go to the dealer for this same issue (ringlands) and every one got a new factory shortblock. Every one. Maybe it's just the dealers around here. Maybe it was getting too expensive for Subaru with all the ones they are replacing.
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Old 01-31-2013, 07:41 PM   #32
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The theory that lean condition caused the final straw just doesn't sit in my stomach any longer. I have found way too many others even with built blocks and upgraded fuel systems all that pop #4. Bad injector I have to disagree because that would be way too coincidental that the #4 injector went bad in all of the cars with this problem.

Is it so hard to believe that a company like subaru might have overlooked something in their manufacturing process? I can say I am glad they are standing behind me this time around but I'm not confident this is the ACTUAL fix. There's no concrete explanation just speculation.
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Old 09-19-2013, 08:47 AM   #33
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Will anyone or any entity ever get to the bottom of this?
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Old 10-04-2013, 04:02 PM   #34
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Well glad you have gotten it fixed! hope it doing ok for you... I have a 2008 wrx with 79k 2nd owner first one babied it to death lol! but had the car less than a week and blew the turbo. Glad I bought extended warranty paid for everything! Now 6000k later spun bearing on the #3 cylinder... Seems to be a problem, I was hoping would not happen to me as I am pretty easy on the car. Havnt gotten the official word yet but looks like the warranty company is going to pay for a new shortblock. Thing is I only have a stage 1 cobb tune too.

Now i'm wondering if I should put in a bigger oil pump?

Thing is I had a 98' OBS with over 270k miles never any engine probems and I drove that like I stole it for 5 yrs. Now 4 months in 2 break down man oh man idk hope this will be the last of it.
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Old 05-07-2014, 07:17 PM   #35
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Update:

Motor just went again! This time I'm ready for a built motor. I just hope the heads didn't get damaged during the explosion. Fingers are crossed and block is waiting for assembly.
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Old 05-07-2014, 07:38 PM   #36
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Quote:
Originally Posted by bddgsxr View Post
Update:

Motor just went again! This time I'm ready for a built motor. I just hope the heads didn't get damaged during the explosion. Fingers are crossed and block is waiting for assembly.
Geesh that sucks:/ how many miles did u have on that block?
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Old 05-07-2014, 08:50 PM   #37
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Goddamn dude. That sucks. I'm torn with my 2014 wrx. 3 months of ownership and already spun a bearing. Thankfully my dealership took care of my car quickly with a new short block. But honestly I'm not comfortable with the car. Had it back a few days and every little noise I hear I just think catastrophic breakdown. If this motor goes it's not getting a warranty stock motor. I'm just gonna bite the bullet and put in a built one. Probably going to order up a motor soon just to have ready.
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Old 05-07-2014, 08:55 PM   #38
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Goddamn dude. That sucks. I'm torn with my 2014 wrx. 3 months of ownership and already spun a bearing. Thankfully my dealership took care of my car quickly with a new short block. But honestly I'm not comfortable with the car. Had it back a few days and every little noise I hear I just think catastrophic breakdown. If this motor goes it's not getting a warranty stock motor. I'm just gonna bite the bullet and put in a built one. Probably going to order up a motor soon just to have ready.
I feel u there man... mine spun a bearing as well and for a few months I was freaking over every noise lol! Prob didn't help that I put in group n mounts on when it was out lol! But about 15-20k later and still going strong:-)
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Old 05-07-2014, 09:02 PM   #39
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Holy cow. How is it possible that you (bddgsxr) have popped multiple motors like this?

What fuel are you running?
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Old 05-07-2014, 09:59 PM   #40
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Hyperutectic pistons are actually stronger than forged. The problem is that they are more brittle. Forged are softer but can handle more shock. The failure is probably the quality of gas in that particular area.. My 14 hasn't had a problem nor has anyone I've ever heard of.. The Subaru dealer in my area has only replaced 2 short blocks since 08 and they were caused by negligence
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Old 05-07-2014, 10:19 PM   #41
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Quote:
Originally Posted by Js14wrx View Post
Hyperutectic pistons are actually stronger than forged. The problem is that they are more brittle. Forged are softer but can handle more shock. The failure is probably the quality of gas in that particular area.. My 14 hasn't had a problem nor has anyone I've ever heard of.. The Subaru dealer in my area has only replaced 2 short blocks since 08 and they were caused by negligence
Hypereutectic pistons are NOT stronger than forged. They are stronger than regular cast aluminum pistons. Forged pistons are the strongest of the bunch but are the most brittle....
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Old 05-07-2014, 10:37 PM   #42
bddgsxr
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Originally Posted by G-WREX View Post
Geesh that sucks:/ how many miles did u have on that block?
I think I got 9000 miles out of this one. Funny thing that my tires last longer than the motor. I run 93 fuel and change the oil every 2000. I do a compression test every oil change to be certain everything is in good working order. At this point I can say for sure Subaru motors are the absolute worst engines ever put in a passenger vehicle. 4 motors in 50k is garbage.
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Old 05-07-2014, 11:04 PM   #43
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4 motors in 50k is garbage.
It's also highly atypical. Something seems to be different in your or your car's case from pretty much everyone else out there.
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Old 05-07-2014, 11:26 PM   #44
G-WREX
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Quote:
Originally Posted by Blackfin View Post

It's also highly atypical. Something seems to be different in your or your car's case from pretty much everyone else out there.
I'd say so! Gotta be gas or something my word never heard of someone going thru that many blocks on 50k :/ and I know a lot if friends with both wrx and Sti all years. I really feel bad for ya bud!

But you shouldn't have any issues with a build block :-). Good luck
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