[jpatt006]

@timakatim Those sound like the exact symptoms my car was suffering from.

Forgot to post this earlier, but I took the car in Tuesday morning and got it back later that afternoon. Luckily it was a failed Oil Control Valve, just like you had. Got it taken care of quickly with very minimal driving, and as a result there was no damage to the turbo or motor. The best part was, the dealer covered the cost since it was part of their purchase warranty and even gave it a fresh oil change (only 1300 since the last one) :monkey_dance:

I'm going to remove the screens soon just as a precaution.

As for the ringland issue, this may sound contradictory, but get a tune (either AP or Open Source). If you read up over on NASIOC you'll see that the guys who are cracking ringlands are usually either totally stock or fully bolted and pushing wayyyyy too much boost on an overly aggressive (poor) tune.

Believe it or not, stock cars were most likely to crack ringlands. The reason has to due with Subaru trying to meet certain emissions standards. Quite simply, they made the stock tune far too lean at the wrong time (when boost is building) with a much larger turbo. Combine that with the aggressive driving habits of most WRX/STI drivers, and well...

If it makes you feel any better, my 2011 WRX had every engine/fuel mod shy of a fully built motor. It put down 312 awhp on a quality tune. I beat the crap out of that motor and never had a single issue, even at that power level.

 

[Laggrider]

Thanks for the updates! I will be removing my filter from the Banjo Bolt! (I was under the impression that 09+ had no screen).

 

[MaTTyBiGs]

It has NO screen in the banjo ON the turbo - it DOES have on on on the banjo on the head that supplies the turbo. That was what the long... discussion... was really about, the semantics of "does the turbo have a filter".

 

[NK2201]

I know this thread has been long dead, but I've got some useful info and this seemed like the best place to put it.

It appears that for 2011 Subaru switched to a dedicated oil supply for the turbo, and removed the filter from the banjo bolt. I found this diagram on NASIOC.

Using the Subaru parts website, I confirmed that 09-10 get a "Union Screw and Filter Assembly" for the turbo supply, but 11+ get "Screw-Union" (no filter). The red arrow on the diagram below shows the banjo bolt with filter on the 09-10 models, and the blue arrow shows the turbo oil supply which splits off. This line is absent on the 11+ diagram since the turbo doesn't share oil with the AVCS solenoid.

Both sources show the new design and reflect there is no longer a banjo bolt filter for the turbo (but still for AVCS). When I pulled the banjo bolt on my 2011, there was no filter and the screw was the "flat top" design, whereas the bolts with filters have a small circular protrusion on the bolt head.

 

[Rescuer]

I actually yet had another convo with somebody this past week about that.

pics from my 2012

pic of the banjo bolt under the inlet


this one shows the turbo oil feed

*edit another pic

 

[bfeinzimer]

I know this thread has been long dead, but I've got some useful info and this seemed like the best place to put it.

It appears that for 2011 Subaru switched to a dedicated oil supply for the turbo, and removed the filter from the banjo bolt. I found this diagram on NASIOC.

Using the Subaru parts website, I confirmed that 09-10 get a "Union Screw and Filter Assembly" for the turbo supply, but 11+ get "Screw-Union" (no filter). The red arrow on the diagram below shows the banjo bolt with filter on the 09-10 models, and the blue arrow shows the turbo oil supply which splits off. This line is absent on the 11+ diagram since the turbo doesn't share oil with the AVCS solenoid.

Both sources show the new design and reflect there is no longer a banjo bolt filter for the turbo (but still for AVCS). When I pulled the banjo bolt on my 2011, there was no filter and the screw was the "flat top" design, whereas the bolts with filters have a small circular protrusion on the bolt head.

I actually yet had another convo with somebody this past week about that.

pics from my 2012

pic of the banjo bolt under the inlet


this one shows the turbo oil feed

*edit another pic

Considering the findings of the 2012 and the new design after 2011, I am trying to piece together on which bolts to look for on my 2011, it is one or all three? I visited the parts dept at a dealer and we found 3 "union screws" on the parts diagram for my VIN.

 

[NK2201]

Considering the findings of the 2012 and the new design after 2011, I am trying to piece together on which bolts to look for on my 2011, it is one or all three? I visited the parts dept at a dealer and we found 3 "union screws" on the parts diagram for my VIN.

Sorry for the delay, but of the three banjo bolts on 2011 and up models, only the two banjo bolts for the AVCS solenoids will have filters. For what it's worth, removing them is significantly less important than the turbo feed line- which already has no filter on your car.

Getting at the AVCS filters is kinda a pain, and IMO only worth doing if you're having troubles. AVCS issues can manifest themselves as weird misfiring and significantly "pulsing" engine output, without a CEL. You can log the left and right AVCS positions using RomRaider. If left and right cams are not within 5* of each other there's a problem.

My friend had a shop clog his AVCS solenoids with a "protective" oil additive. That's how we learned the above.

 

[bfeinzimer]

@NK2201 Thanks for this helpful info, sounds like for the MY11 to just leave well enough alone!