you won't believe this.....blown turbo pics....How?

[jetski247]

yes, it has a flex joint which i did look down and saw nothing out of the ordinary but it is a good point.

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[jetski247]

i'll be posting a "putting everything back together" thread so you guys can see if it'll blow up or run like a champ.

[BraveSTi]

...ouch

[BLK_VR38]

Mis-routed vacuum lines, especially for say catch-cans or after a motor pull can result in over-pressure in the heads and ultimately excessively high oil pressure. Seen this happen a few times.

[TyranosaurusWRX]

Any new updates?

[jetski247]

getting an engine builder to build an engine with forged pistons, going with a vf22bb turbo and ported the tgv's and tb, and port matched the intake manifold, other than that, not much to report, just another blown engine thread.

[aboothman]

WOW this thread is full of stupid comments. I would elaborate, but it is irrelevant at this point.

So you had a bad piston?

[McKenzie83]

Originally Posted by aboothman

WOW this thread is full of stupid comments. I would elaborate, but it is irrelevant at this point.

So you had a bad piston?

you're my hero... LMAO

[edberg]

I just bought an 18g and all this talk about banjo bolts and filters have me worried, Should I reuse all the stock bolts? Should the turbo come with a different banjo bolt? (bought used) Remove filter?

[2Fast4U1DAY]

Originally Posted by aboothman

WOW this thread is full of stupid comments. I would elaborate, but it is irrelevant at this point.

So you had a bad piston?

No. His pistons were fine. All his rod bearings $hit the bed. Cause is unknown (I think?. He hasnt updated his build thread recently that I've seen).

[jetski247]

he's collecting photos right now. among many other things.

[aboothman]

Ya it sounded like oil starvation to me. That would explain the rod bearings and the turbo(s) going out.

Originally Posted by McKenzie83

you're my hero... LMAO

Your posts were not exactly brilliant or insightful. Overboosting on the factory solenoid would generally lead to fuel cut. Assuming his tune actually has fuel cut set, but most competent tuners (and even some not so competent ones) set fuel cut a couple psi about boost target. Combine that with the OP saying he kept it out of boost after the turbo replacement, never witnessed any severe boost spikes, and the fact that these turbos are known for taking 25+ psi without instantly "exploding" and I am let to believe that overboost was not the cause of his issues.

Or it would have detonated due to overboost...and he DEFINITELY would have know if that had happened.

As for the boost solenoid, that line that returns to the intake is just there to ensure that metered air bled off from the solenoid is returned to the engine, so I highly doubt it being damage would cause you to overboost.

Either way, I am sorry to hear about your engine trouble, and I did not post in here to start a battle. I hope your build goes fast, and inexpensive. Don't skimp on some of the parts that could cause future issues...such as the oil heat exchanger

[synolimit]

Originally Posted by aboothman

As for the boost solenoid, that line that returns to the intake is just there to ensure that metered air bled off from the solenoid is returned to the engine, so I highly doubt it being damage would cause you to overboost.

first person i saw say what that line really is!!! thank you! on the stock 2port or 3port its a worthless line that just runs the air back into the system instead of venting it to atmos because the Govt. says thats a NO NO. all air must be vented back into the system to be used again and run out the exhaust through the CAT. just like your crank case vent and valve vents. all could be vented to atmos but stock wise their not allowed. HOWEVER, if you vent the line running off the BS to atmos you must cap the hole on the inlet. if not your letting metered air out of the inlet and you'll run like crap. well technically when in boost you'll be sucking in air through the little hole thats not getting filtered or messured by the MAF.

now since you said the car was running fine i highly doubt the line had a hole in it even though it looked dry rotted. letting metered air out of the inlet or in would be more a motor problem then a turbo problem. it would be the same as running a BOV. the car would run rich/lean and like crap but the motor would have blown not 2 turbos!!

now just to clarify, you said you just decided to remove the filter in the banjo bolt on the block just cause?? ever since you did that 2 turbos have blown. i personally can only think of 2 things why that happened. 1 your just that unlucky and 2 turbos went when it was their time. and 2 when re-installing that banjo bolt something went wrong. does Subi by chance say how the banjo bolt needs to be installed. like does the 2 holes in the banjo need aligned with the flow of oil running through the metal oil line??

[jetski247]

the hole was plugged on the turbo inlet where the boost controller vacuum line went so there was no un-metered air that i know of.

yes, two turbos went out after removing the avcs filters and the filter in the banjo bolt on the back of the block going to the turbo so with the loss of the three filters, maybe too much oil to the turbo?

i don't know either, i just guess that my original went out due to age, the second went out due to the vacuum line not being hooked up to the turbo inlet, ive herd both sides of the story on the vacuum line from the boost controller is important and not important but i have no idea.

it ran flawlessly until one cold day my fuel lines leaked like crazy and i had to replace them, thats when everything went to crap.

as far as the build goes, going with a subie engine builder so im putting my trust in him, oil cooler will be new, i cut my old one in half on the saw the other day and would not run it even if i cleaned it 100 times. so far i'm looking in the neighborhood of 3000 doing everything myself but the rebuild. my old engine is total trash.

[synolimit]

Originally Posted by jetski247

my old engine is total trash.

hmm. now its impossible to tell. that leak of fuel for a minute or whatever could have run lean, something could have broke, and the turbine wheel could have broke by sucking up metal pieces which broke everything else in the turbo. O well sorry, GL!

[johnblahuta88]

Where did you buy the longer banjo bolt. its the middle of the three bolts. I really need a longer one with my feed line