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Old 07-23-2008, 12:18 AM   #1
Nasty_STi
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Default 2007 WRX Motor Gone???

So saturday I am driving down the highway, I slow for a light, it changes I am in 3rd gear, I get in it a little to get back up to 65. I don't go balls out, but take it to about 5000rpms and about 17psi. As I approch the next light I let off the gas to stop and the car dies. After a quick visual inspection I try to start the car. It cranks a sec then starts right up. Its smoking just a little and seems to be misfiring. No check engine lights but something is not right. I go to pull off the highway into a parking lot, no more than 400ft, as soon as I give it gas white smoke poors out and check engine light comes on. I shut the car down and tow home. I get home and now its leaking oil from several locations under the car, mostly from around the exhaust manifold. I had just changed the oil two day before yet it was extreamly black, and there was no oil showing on the dipstick. I pull the codes, they are some MAF codes is all. So I add some oil, and plug in the laptop. I start logging roughness and #3 is where the problem is at. I take the plug out and the bottom is broken and its coverd in oil. I pull the rest of the plugs and same thing all covered in oil (no others made contact or are broken). I pull the turbo and the intake side as well as the intake and Intercooler piping are all full of oil. Obviously my motor is gone, the piston made contact with the plug. My question is has anyone ever had this issue before, and what the hell might have caused it. I am a very competent mechanic, and I am 99.9% sure nothing I did would cause this. The car was also on the dyno three weeks ago and made 337hp and 305tq and went on to run a 12.7 @ 109. I always run 104 in the car and very rarely take the car into boost over 10psi. Matter of fact prior to driving it saturday I hadn't driven it in a week. Any input on this situation would be appreciated.

Mod List:.
2007 WRX 12,000 Miles
Blouch Dom III
TurboXS FMIC
850's
255 Pump
Crawford TGV's
APS 3" Inlet Pipe
Cobb 70mm Intake
Headers and TBE
Cobb Pulley
Carbon Drive Shaft
Spec Clutch
RA Gears
All Tuned On Cobb's Dyno in SLC, UT by John Shafer formerly of Precision Tuning.
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Last edited by Nasty_STi; 07-23-2008 at 12:30 AM.
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Old 07-23-2008, 09:49 AM   #2
tekfoc
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WHITE /07 STI IS SOLD

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Quote:
Originally Posted by Nasty_STi View Post
So saturday I am driving down the highway, I slow for a light, it changes I am in 3rd gear, I get in it a little to get back up to 65. I don't go balls out, but take it to about 5000rpms and about 17psi. As I approch the next light I let off the gas to stop and the car dies. After a quick visual inspection I try to start the car. It cranks a sec then starts right up. Its smoking just a little and seems to be misfiring. No check engine lights but something is not right. I go to pull off the highway into a parking lot, no more than 400ft, as soon as I give it gas white smoke poors out and check engine light comes on. I shut the car down and tow home. I get home and now its leaking oil from several locations under the car, mostly from around the exhaust manifold. I had just changed the oil two day before yet it was extreamly black, and there was no oil showing on the dipstick. I pull the codes, they are some MAF codes is all. So I add some oil, and plug in the laptop. I start logging roughness and #3 is where the problem is at. I take the plug out and the bottom is broken and its coverd in oil. I pull the rest of the plugs and same thing all covered in oil (no others made contact or are broken). I pull the turbo and the intake side as well as the intake and Intercooler piping are all full of oil. Obviously my motor is gone, the piston made contact with the plug. My question is has anyone ever had this issue before, and what the hell might have caused it. I am a very competent mechanic, and I am 99.9% sure nothing I did would cause this. The car was also on the dyno three weeks ago and made 337hp and 305tq and went on to run a 12.7 @ 109. I always run 104 in the car and very rarely take the car into boost over 10psi. Matter of fact prior to driving it saturday I hadn't driven it in a week. Any input on this situation would be appreciated.

Mod List:.
2007 WRX 12,000 Miles
Blouch Dom III
TurboXS FMIC
850's
255 Pump
Crawford TGV's
APS 3" Inlet Pipe
Cobb 70mm Intake
Headers and TBE
Cobb Pulley
Carbon Drive Shaft
Spec Clutch
RA Gears
All Tuned On Cobb's Dyno in SLC, UT by John Shafer formerly of Precision Tuning.

wow that sucks you had a nice setup.
cause is pointing to severe det that caused the plug to fail- explode.
expect for the ring lands to be cracked on the pistons. lets hope the heads did not get damaged .

Last edited by tekfoc; 07-23-2008 at 09:55 AM.
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Old 07-23-2008, 09:56 AM   #3
sluflyer06
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My 06' motor went a bit over a month ago, setup was making 355whp on a 20G/ewg/etc. Motor had 38K miles on it, regular maintence etc, oil changes at 3K interval.

#4 looked to have blown from the ringland through the crown and contact with the spark plug was made as well. Alot of fingers have been pointed at the Iridiums I had. I did have some damage to the combustion chamber in that cylinder but nothing that couldnt' be fixed.

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Old 07-23-2008, 10:49 AM   #4
Nasty_STi
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Damn.. This really sucks.. I fully expect #3 to look like the above pic, but hoping that the rest just got oil in through #3 being bombed.. It was time for a new block and PPG's anyways, so I'm not overly stressed out about this, but none the less it blows. Any idea what might cause this at fairly low boost and very mild rpms?

I also had NGk 1step colder plugs.
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Old 07-23-2008, 11:12 AM   #5
tekfoc
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Quote:
Originally Posted by Nasty_STi View Post
Damn.. This really sucks.. I fully expect #3 to look like the above pic, but hoping that the rest just got oil in through #3 being bombed.. It was time for a new block and PPG's anyways, so I'm not overly stressed out about this, but none the less it blows. Any idea what might cause this at fairly low boost and very mild rpms?

I also had NGk 1step colder plugs.
have your engine logs pulled to see what happend .
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Old 07-23-2008, 11:14 AM   #6
anickode
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Quote:
Originally Posted by Nasty_STi View Post
Damn.. This really sucks.. I fully expect #3 to look like the above pic, but hoping that the rest just got oil in through #3 being bombed.. It was time for a new block and PPG's anyways, so I'm not overly stressed out about this, but none the less it blows. Any idea what might cause this at fairly low boost and very mild rpms?

I also had NGk 1step colder plugs.
Could have been metal fatigue... One of those things that you just never know when it'll give way.

Any chance your recent oil change might have dislodged a little blob of sludge that made its way into the oil passages?
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Old 07-23-2008, 11:24 AM   #7
Element Tuning
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It sounds like you cracked the piston pretty badly on the top like in the picture posted as that's really the only way a piece could hit the spark plug. It's also possible you dropped a valve but that's pretty rare for a stock motor.

No matter what unfortunately you'll have to pull the motor down for a rebuild at the very least but whenever there is major contact like this it usually damages the bore, the heads, and the valves (also check your crank for run out).

If you find no source of a mechanical failure that could have caused this then make sure your tune is adjusted so it doesn't happen again.

Good luck.
Phil
www.elementtuning.com
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Old 07-23-2008, 11:30 AM   #8
Nasty_STi
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Quote:
Originally Posted by tekfoc View Post
have your engine logs pulled to see what happend .
I pulled the logs myself, and there was nothing out of the norm. It wasn't showing any det or anything else that may have indicated what went wrong. I pulled the motor last night, so today hopefully I can find a nice stand and start breaking her down.

Quote:
Originally Posted by anickode View Post
Could have been metal fatigue... One of those things that you just never know when it'll give way.

Any chance your recent oil change might have dislodged a little blob of sludge that made its way into the oil passages?
Anything is possible.. I guess I will find out when I crack it open.

Quote:
Originally Posted by Element Tuning View Post
It sounds like you cracked the piston pretty badly on the top like in the picture posted as that's really the only way a piece could hit the spark plug. It's also possible you dropped a valve but that's pretty rare for a stock motor.

No matter what unfortunately you'll have to pull the motor down for a rebuild at the very least but whenever there is major contact like this it usually damages the bore, the heads, and the valves (also check your crank for run out).

If you find no source of a mechanical failure that could have caused this then make sure your tune is adjusted so it doesn't happen again.

Good luck.
Phil
www.elementtuning.com
I am very confident that it had nothing to do with the tune. It had been tuned for about 5,0000 miles now, and John has got his **** together. I am praying there is no damage to the head though. But like I said time for a built motor and PPG's. Thanks for everyones input. Now any suggestions on what route to take with building this thing up?
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Old 07-23-2008, 11:57 AM   #9
mxpunk
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how do you afford 104 octane and live in socal?!!

sucks dude. hope your new motor goes together good.
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Old 07-23-2008, 12:05 PM   #10
Nasty_STi
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06 EVO IX MR

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I am actually in Utah at the moment. I am between San Diego and Salt Lake quite often but mostly in San Diego. And thanks I am hoping it will all work out.
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