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Old 12-15-2012, 02:06 AM   #26
SubieCrack
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My 2007 WRX did something similar to this a while back only it did not come from the exhaust. It basically just spewed smoke from under the hood and car in the front. It turns out that the seal on my oil pan had gone bad and oil was just burning on the engine. ( A very large amount. ) I highly doubt this is the case with your problem as it is more of an internal issue otherwise it would not be coming out of the exhaust. I hope you have some money saved up.
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Old 12-15-2012, 06:48 AM   #27
Juice66
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Ringland failure with stock pistons is not news to the wrx community. Ringlands are breaking on the daily in these cars...seriously.....
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Old 12-15-2012, 10:17 AM   #28
cowboy_Rob
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That's some really low numbers on all the cylinders. When I broke my ring land I had 3 cylinders close to 150 and cylinder 4 at 75 but my piston broke the first and second ring lands
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Old 12-15-2012, 11:05 AM   #29
Zackbo
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Just keep it an option to just replace the broken ringland piston with another stock piston. Much, much cheaper, and will get you by. I've done it on several other people's cars with no problem. Pull engine, remove related head, pull bad piston, knock and quick hone, and replace. Day job, $200. All the cracked ringland pistons I've tore down didn't score the cylinder at all, though yours might be an exception the way it's smoking.

I know the next comment will be "it will just happen again". You will have to invest some of the funds from the build into a better tune. There are plenty on here making 500whp on stock pistons, including myself. Been doing it a while, and I've never broke a ringland or spun a bearing. Yes, you will have to have a rock solid-tune to make this work, or convert to E85, or spray more meth than gas (like I'm doing), or all of the above.

But it is an option....
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Old 12-15-2012, 07:42 PM   #30
eric richardson
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Today I got the motor half way ready to come out, I'm not screwing around with these pistons, I'm buying a new sti short block then installing new cp forged pistons along with ARP rod bolts and head studs, having the heads cleaned and valve job done then its going back together.

I'm also thinking of getting a new clutch. I want something that can hold 400whp buy also be very streetable. My last 3 cars had very aggressive 6 puck clutches and I would like to stay away from that twitchy ON-OFF feeling of 6 puck clutches.
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Old 12-16-2012, 10:35 AM   #31
eric richardson
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Last night I got it ready to come out, going to get a engine hoist and get this thing out today!




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Old 12-16-2012, 11:46 PM   #32
WRXSteye20008
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A new 11mm oil pump as well if something grenaded in your engine it's wise to replace it and since the intake manifold is off it is a good idea to also do you turbo inlet as you will likely rip or have to cut your oem one, Perrin is a good choice for after market. Since you will need to get a tune for the forged pistons as it changes the compression a tiny bit, any performance items you want to add is good idea as well.

Last edited by WRXSteye20008; 12-16-2012 at 11:51 PM.
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Old 12-17-2012, 08:28 PM   #33
eric richardson
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Well today I ordered a MAP performance stage 1 short block with ARP rod bolts, also a Killer-B oil pick up. I really wanted to build this one myself but then again I don't want to do all this again if it fails! Haha.

The stock clutch has tons of life left in it so it will be going back in, the heads are being cleaned and machined locally, now all that's left to buy is gasket set, timing belt/water pump, spark plugs, fluids etc.

Anything else I may need?
There saying 2-3 weeks to complete the block, so hoppfully ill be back on the road in a couple months tops!
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Old 12-17-2012, 08:41 PM   #34
coalslaw
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timing belt from google.com. Get you some headers and exhaust after break in period. break in hardd, get em seals sealed up nice!
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Old 12-17-2012, 08:53 PM   #35
drewvdw
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Flywheel, either resurfacing it or replacing it.
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Old 12-17-2012, 09:05 PM   #36
eric richardson
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Quote:
Originally Posted by drewvdw View Post
Flywheel, either resurfacing it or replacing it.
You think I should still resurface it with reusing the stock clutch?

Also ill buy a new throw out bearing.
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Old 01-20-2013, 11:04 AM   #37
eric richardson
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Its been a month sense my last post, not much has happened, I got the org. motor out and apart, and still waiting for MAP performance to send my motor. There saying 2-3 more weeks because they recieved the wrong pistons and are waiting for new ones, then Im ready to get this beast back on the road!




here is the #4 cylinder, as expected. Broken ring land. I caught it soon enought that id didnt scratch the cylinder wall at all. and all the pieces stayed in between the rings.






My first part in the mail, Killer-B! cute little thing:


cylinder heads are have been cleaned, checked for cracks and valve job performed. they look great! and it was only $195 total for both heads!



My buddy Jordan being a funny guy...
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Old 01-21-2013, 01:52 AM   #38
teethandnails
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Ouch... sucks WRX's have crappy ring lands. Evo X's are no better... tons of failures.

Good luck with the new motor... all the best!
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Old 01-21-2013, 03:03 AM   #39
WRXSPOOLIN350
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Wow that's awful man! At least u have a great attitude about it and are resolving the situation! It's crazy because I drove 8 hours to look at an 07 STi in that same color. I took it to Subaru and had it checked and they told me to run if I haven't bought it! So weird tho its the same body color year as that.
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Old 01-21-2013, 09:20 AM   #40
mhoerath
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Quote:
Originally Posted by eric richardson View Post
Anything else I may need?
Oil cooler MAY hold some metal pieces from broken parts...I replaced mine and killer b oil pickup.

and to keep this thread alive lets talk about engine break in! there are lots of opinions what is best.

my shop had me break in mine this way...
break-in tune limit rpms to 4k, and boost to 9 lbs.
royal purple break in oil, changed at 3k miles.
royal purple break in oil until 6k.
then regular oil, performance tune to my mods.
engine still happy after 50k miles.
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Old 01-21-2013, 10:55 AM   #41
car_freak85
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As far as breaking in my engine:

Varied RPMs, no constant engine speed, zero boost allowed for 1,000 miles. Did the "tough" break-in on the first drive to help seat the rings.

Generic 30 weight for 20 miles, slightly less generic 5w30 up to 1,000 miles.

After that, swapped to 5w30 Redline and WOT is now allowed.

Have almost 10,000 miles on it now and so far the UOAs are looking good.
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Old 01-22-2013, 08:10 PM   #42
eric richardson
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The tech at Map Performance told me to use castrol conv. Motor oil, driving easy and vary the RPMS up to 5,000ish for 600 miles then tune and give it hell. I don't think ill be that EXTREAM with it. Seems a little harsh???
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Old 01-23-2013, 05:55 PM   #43
Angry STi
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Quote:
Originally Posted by FCmaniac View Post
Here are some options for preassembled shortblocks with forged pistons instead of buying a new OEM shortblock and putting your own forged pistons in -
Rallispec - $3500 (includes Cosworth pistons and Manley rods)
AWD Tuning - $2900 (from IIR, includes Arias pistons and ACL bearings)

You could also send your shortblock to CNC Engine Dynamics and they'll rebuild it with CP pistons for $2285.
good info , I might need this as I'm in the process of going from Stg2+ to Big turbo.
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Old 01-24-2013, 04:40 AM   #44
NWSTi-wa
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here is the #4 cylinder, as expected. Broken ring land. I caught it soon enought that id didnt scratch the cylinder wall at all. and all the pieces stayed in between the rings.



We have matching pistons! Sorry about the luck but I feel your pain, same exact thing happened to my 04
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Old 01-24-2013, 10:01 PM   #45
BraveSTi
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Damn..
you'll be back on-the-road-though!
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Old 01-24-2013, 10:22 PM   #46
WaitTheresMore
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just curious how did the old oil pickup look like? was it cracking?
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Old 01-25-2013, 09:24 AM   #47
eric richardson
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Quote:
Originally Posted by WaitTheresMore View Post
just curious how did the old oil pickup look like? was it cracking?
Not at all, it looks great, but Im not trusting it. Haha
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Old 01-27-2013, 10:22 AM   #48
eric richardson
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Small update, I just got the last of my parts, gates timing belt/water pump kit with pulleys, ARP head studs, and Grimmspeed light weight crank pulley (because I dropped the stock one and broke it) ugh.
I spoke with MAP yesterday and they said my motor is shipping out next week! WAHOOO!





There she sits just waiting for her heart transplant:
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Old 02-07-2013, 08:38 PM   #49
eric richardson
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Here it is! Man she's purdy! MAP did an amazing job, and it was packed Extreamly well.

Last night I got started assembling. I triple torqued the head studs like ARP Recomnends. I shouldn't have any problems lifting the he's ever!





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Old 02-07-2013, 09:17 PM   #50
coolpainter
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at the end of the day could you tell me what the total cost was for everything
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