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Old 04-15-2014, 04:01 PM   #1
fr0st
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Default 08, My EJ255 just blew... why??

this is my daily driver,

this car has been maintained religiously. it's stock except for a Stage 1 and not taken to the rev limiter or anything.. it's been used to accelerate furiously but other than that not half of what others do..

i se a remote starter all winter to let it warm up.. use Amsoil since the last 25000 miles since i got it.. the guy before wans't no light bright and didn't sue it to do auto X or anything..


WTF happened ? i just got in the car from the supermarket and start it up.. and it went CLACK CLACK CLACK CLACK... from one side of the engine.. and it's oil is fresh from last month and never went low.. coolant is A1 too..

I'm 40 years old and drive pretty relaxed..

WTF happened ?? it'S knocking like hell

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Old 04-15-2014, 04:19 PM   #2
Razgeiz
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Spun a rod bearing from the sounds of it. Its really luck of the draw man. I spun one with 11k on the clock stage 2. It happens due to a random det pushing the oil film out from between the rod and bearing. From there its metal on metal and then the bearing is toast.

All you can do is get a new block and move on. Be sure to get the oil cooler replaced NOT CLEANED.
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Old 04-15-2014, 04:43 PM   #3
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I'm banning subaru from this house... thats what im doing
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Old 04-15-2014, 04:52 PM   #4
mmetalmilitiaa
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Haha... Guessing you were stage 1 cobb base map?

Maybe it's just me.. But it seems like running an off the shelf map is an engine killer for a lot of folks
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Old 04-15-2014, 05:50 PM   #5
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i can't find a used EJ255 anywhere.. anybody installed a EJ207 / EJ 205 without too much trouble ?? they seem to be alot of those on the used market.

and there forged.
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Old 04-15-2014, 06:52 PM   #6
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I'm gonna guess the oil pick up broke since it happened out of nowhere.
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Old 04-15-2014, 06:56 PM   #7
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Boost spike, loss of oil, high timing, too tight tolerances, incorrect oil weight .

Typically an off the shelf tune should be conservative, and knock shouldn't happen. Although nobody really says anything about it, I tend to think the tightish engine tolerances are more of a cause, but that's merely a guess. These are pretty high boost cars, and metal parts squish and deform. There needs to be enough bearing clearance in all directions to accommodate these deformations. I tend to wonder if it's hit or miss that some of these cars are too tight for their own good. Typically knock will just bust the #4 piston, and people spin bearings when they run out of oil. However some guys just spin a bearing on a perfectly good engine. There's always a reason. It's just a matter of what caused it.
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Old 04-15-2014, 07:44 PM   #8
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Quote:
Originally Posted by Back Road Runner View Post
Boost spike, loss of oil, high timing, too tight tolerances, incorrect oil weight .

Typically an off the shelf tune should be conservative, and knock shouldn't happen. Although nobody really says anything about it, I tend to think the tightish engine tolerances are more of a cause, but that's merely a guess. These are pretty high boost cars, and metal parts squish and deform. There needs to be enough bearing clearance in all directions to accommodate these deformations. I tend to wonder if it's hit or miss that some of these cars are too tight for their own good. Typically knock will just bust the #4 piston, and people spin bearings when they run out of oil. However some guys just spin a bearing on a perfectly good engine. There's always a reason. It's just a matter of what caused it.
I'm running 5W40 europeen formula Amsoil wich is great for turbos... and in summer 10W40...

the the weather is around freezing point so the boost doesn't more than 9 psi since the mapping lowers the boost in colder weather/climats... and even at warmer temperature, im running 12.5 13 psi.. so it's not that bad..

oil lvl is at full mark, oil is 1 month old...

this just happened out of no where.. it has 92000 km / 50 000 miles..
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Old 04-15-2014, 08:12 PM   #9
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Hmm, interesting. You don't have a new motor. You don't have enough boost to really get into any trouble. I don't suppose you saw the oil light pop up. I'm thinking about random failures. For example, did the oil pickup break? I'm just trying to think of random stuff that could have happened. I'd be curious to see the cause after a teardown.
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Old 04-15-2014, 08:39 PM   #10
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so this car had a previous owner?
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Old 04-15-2014, 09:50 PM   #11
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Got a vid? Interesting that the noise is dominant on one side of the engine. Since the big-end is centrally located spun bearing noises typically seem to emanate more toward the center. If the bearing shell is basically gone the piston could be kissing the head to make a noise out there...

Is it still running on all four?
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Old 04-15-2014, 09:51 PM   #12
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Damn, that sucks man. Sorry for your luck..

Quote:
Originally Posted by BigRob74 View Post
so this car had a previous owner?
Before I finally pulled the trigger on a new 2014, I was on the verge of used purchases over the years, but ultimately decided against it for one reason or another. I am also beyond the age of pissing vinegar (well a dilluted mix actually) and although I do drive "spirited at times" I am conscientious of the engine and turbo load. Short and curly, age and wisdom dictates my driving habits and how this affects the clutch, turbo, tranny etc. This said, I hope for my baby to have a long life.

I realize that this adds nothing technical to this thread, however I am very interested in hearing the details of the post mortal autopsy. These things always provide little learning experiences for those following. Beat down strawberry or random event that had a cause beyond owners control?



On a side note, how long do you let it warm up at idle in the winter and how frequently?

Last edited by PVASubie; 04-15-2014 at 10:05 PM.
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Old 04-16-2014, 04:01 AM   #13
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Quote:
Originally Posted by Blackfin View Post
Got a vid? Interesting that the noise is dominant on one side of the engine. Since the big-end is centrally located spun bearing noises typically seem to emanate more toward the center. If the bearing shell is basically gone the piston could be kissing the head to make a noise out there...

Is it still running on all four?
i'll make a short vid.. and yes still running on all four though it's vibrating funny. no CEL, nothing.

Quote:
Originally Posted by PVASubie View Post
Damn, that sucks man. Sorry for your luck..



Before I finally pulled the trigger on a new 2014, I was on the verge of used purchases over the years, but ultimately decided against it for one reason or another. I am also beyond the age of pissing vinegar (well a dilluted mix actually) and although I do drive "spirited at times" I am conscientious of the engine and turbo load. Short and curly, age and wisdom dictates my driving habits and how this affects the clutch, turbo, tranny etc. This said, I hope for my baby to have a long life.

I realize that this adds nothing technical to this thread, however I am very interested in hearing the details of the post mortal autopsy. These things always provide little learning experiences for those following. Beat down strawberry or random event that had a cause beyond owners control?



On a side note, how long do you let it warm up at idle in the winter and how frequently?
always... we get freakn' cold winters here.. the car has a bloc heater and was always plugged it.. and the emote startwas always used to make it idle at least 10 minutes.. wheni would take off from my house or job, the needle was at 1/4 range.. no reving over 3000 rpm..
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Old 04-16-2014, 09:11 AM   #14
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Oil pickup breaking could be a great possibility. You won't know it, and the engine runs on little or no oil pressure and something fails. If it's the pickup, you don't want to run the engine at all. Can you drop the oil pan to inspect pickup?
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Old 04-16-2014, 09:34 AM   #15
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Quote:
Originally Posted by some dude View Post
Oil pickup breaking could be a great possibility. You won't know it, and the engine runs on little or no oil pressure and something fails. If it's the pickup, you don't want to run the engine at all. Can you drop the oil pan to inspect pickup?
When mine started forming a crack my oil pressure like would flicker on startup. If it was fully cracked, the light would stay constant I would think..
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Old 04-16-2014, 01:32 PM   #16
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Quote:
Originally Posted by fr0st View Post
it's stock except for a Stage 1
So...not stock. It sounds like it was just bad luck, but anything modifying your tuning (especially one size fits all maps) do come with risk. Having the map tuned to fit your vehicle can reduce this risk, but will still take out the warranty. I hope your dealer is helpful, and relaxed about this stuff; even though you are out of the factory 5 year 60k powertrain, they might help if you have done all your service there.
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Old 04-16-2014, 03:46 PM   #17
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got all my oil changine bills and the car is at the dealer .. they explained they wanna take the oil pan off and take pictures and then show this to subaru ... i took off the cobb stg 1 even though it will leave a trace

the sound, comes from the center.. it's not one side in particuler..

i'll post the video tonight..
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Old 04-16-2014, 08:47 PM   #18
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Quote:
Originally Posted by fr0st View Post
got all my oil changine bills and the car is at the dealer .. they explained they wanna take the oil pan off and take pictures and then show this to subaru ... i took off the cobb stg 1 even though it will leave a trace the sound, comes from the center.. it's not one side in particuler.. i'll post the video tonight..
It doesn't leave a trace.
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Old Yesterday, 02:47 AM   #19
kellygnsd
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Quote:
Originally Posted by boosted25 View Post
It doesn't leave a trace.
It changes the ecu checksum. They are able to tell if lithe ecu has been reflashed but do they care?
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Old Yesterday, 06:38 AM   #20
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Quote:
Originally Posted by kellygnsd View Post
It changes the ecu checksum. They are able to tell if lithe ecu has been reflashed but do they care?
Quote:
Originally Posted by Cobb Tuning View Post
There is a lot of rumour and concern about this issue and the bottom line is that we have never found this to be true. There is no stored data in the Subaru ECU that the dealer can see to show that the ECU was ever flashed. There is no "black box" or recorder that the dealer can look at and say "AHA! You have a flash!". We have been inside these ECUs probably more than most folks and we just cannot find any evidence for this at all. I have a feeling this is something that some service writers tell people who purchase these cars as a sort of boogy man. You should use your AccessPORT with confidence and if you uninstall the AccessPORT your ECU is back to 100% stock. Travis COBB Tuning
Not according to COBB.
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Old Yesterday, 07:20 AM   #21
Cathexis
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Quote:
Originally Posted by kellygnsd View Post

It changes the ecu checksum. They are able to tell if lithe ecu has been reflashed but do they care?
It replaces the checksum number with the one that was on the car when you married the ap. Checksum counts resets, such as when the battery is disconnected not just flashes...
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