Direct Injector Leaking

[ft_sjo]

So now it's faulty cylinder heads? Ha ha.

[regal]

Originally Posted by ft_sjo

So now it's faulty cylinder heads? Ha ha.

I don't know your native language but and/or means either or, not necessarily both. Remember the only thing we have from Subaru is a serious TSB involving cylinder head to cam shaft sensor shimming, a service no Scion dealership around here is capable of. And of course nothing from Toyota.

What we consumers have for hard data are loud detonation, knocks, blown seals, rods and holes in cylinder heads. Of course there is much speculation which is what forums are for, especially in the vacuum Toyota as left us consumers with for 6 months.

You obviously are 100% sure the South Aftrican field service memo addresses the issue. So not sure why you keep checking these threads ? Did you flash a corrected ignition retard table and void your warranty? Worried even a little ?

[Carwhisperer]

Originally Posted by regal

Yes. The dealer probably won't touch it till it throws a rod so I agree we need a good FAQ or video.

As far as build dates I know both of CsgMike's engines were late summer last year and mine as well. So July/August. What is your build date?

The other thing to consider is if the issue is a head machining/tolerance problem, it may make more sense to let it go and total the engine rather than replacing O-rings ever 5k-20k miles. I don't think there have been any '13 build dates with the problem ?

What?? If it was a single pop I wouldnt worry at all. Youll hear subtle microexlposions in higher rpms under WOT A good while before your DIs go completely kaput. 1 single pop is not a sign. Atleast was not for me at all.

[andrew20195]

Originally Posted by regal

I don't know your native language but and/or means either or, not necessarily both. Remember the only thing we have from Subaru is a serious TSB involving cylinder head to cam shaft sensor shimming, a service no Scion dealership around here is capable of. And of course nothing from Toyota.

Does Scion not have that service bulletin? I only know the Subaru side of it.

It's not the cylinder heads, though. The cam sensors are mounted to the chain cover. The issue is greater than expected runout in the cam sensor wheel mounted at the front of the cam sprockets and/or incorrect cam sensor mounting height. The bulletin calls for shims to be added to increase the gap, but from what I hear, some chain covers have required machining because the gap is too large. This is an issue with all early F-series engines, not just the FA20.

I don't believe this issue would result in detonation or DI seal failure. If the cam sensor isn't getting a clean reading, it's more likely to not inject fuel and/or not fire the ignition coil, resulting in a misfire. My car was manufactured before the countermeasure, so if it acts up, I'll be sure to make a detailed post about the problem and repair.

[WHITE]

Originally Posted by Carwhisperer

What?? If it was a single pop I wouldnt worry at all. Youll hear subtle microexlposions in higher rpms under WOT A good while before your DIs go completely kaput. 1 single pop is not a sign. Atleast was not for me at all.

Sorry maybe i was a bit lax on my details. It was not just a one time pop, its still happening. Its a random pop, i cant reproduce it on demand but it will randomly pop from time to time, most often during a 5th gear 3000rpm downshift to 4th gear while revmatching with a short blip of the throttle(free rev). The pop occurs during the innitial throttle on, typicaly you can hear the intake suck in but it randomly produces a pop sound at the same time.

Ill try to stick a go pro in my engine bay and go for a drive today and see if i can catch the sound.

I understand i still have thousands of miles to go before anything catastrophic occurs. And trust me its not going to affect my joyouse driving experience. Im just trying to verify this is related to the direct injector, and isnt some other sound. Id pull my injectors today and look at them if i had the seals or new injectors to put back in.

[Carwhisperer]

Originally Posted by WHITE

Sorry maybe i was a bit lax on my details. It was not just a one time pop, its still happening. Its a random pop, i cant reproduce it on demand but it will randomly pop from time to time, most often during a 5th gear 3000rpm downshift to 4th gear while revmatching with a short blip of the throttle(free rev). The pop occurs during the innitial throttle on, typicaly you can hear the intake suck in but it randomly produces a pop sound at the same time.

Ill try to stick a go pro in my engine bay and go for a drive today and see if i can catch the sound.

I understand i still have thousands of miles to go before anything catastrophic occurs. And trust me its not going to affect my joyouse driving experience. Im just trying to verify this is related to the direct injector, and isnt some other sound. Id pull my injectors today and look at them if i had the seals or new injectors to put back in.

Yeah all you have to do is press the throttle in and if you hear constant popping that's your DI's.. if its during shifting I would worry at all. When I go from 3rd to 2nd at 40 mph I will Rarely get a muffled single pop from under the car if that's what you are referring to.

[WHITE]

Originally Posted by Carwhisperer

Yeah all you have to do is press the throttle in and if you hear constant popping that's your DI's.. if its during shifting I would worry at all. When I go from 3rd to 2nd at 40 mph I will Rarely get a muffled single pop from under the car if that's what you are referring to.

heres the sound in question, i took two 19 minute videos in wich time it made this noise 5-6 times(one time is iffy as engine rpm drowns it out)

this video was 4 minutes 40 seconds into my first video, just cruising the streets in my neighborhood with no "aggressive" driving. i was coming to a stop sign and heel toed from 3rd to 2nd @ ~3200 rpm. i heard it clear as day in the car too.

[ame="http://www.youtube.com/watch?v=NpHZZpgccF0"]i dont know how to embed[/ame]

what are your thoughts?

[Dezoris]

Wanted to add this here for people subscribed about removal and install of the seals:
http://www.ft86club.com/forums/showthread.php?t=42849

[ame="http://www.youtube.com/watch?v=sdeO4rBwuQ4"]Scion FR-S BRZ Direct Injector Seal Replacement | Problems and Issues - YouTube[/ame]

[mwjcyber]

Originally Posted by Dezoris

Wanted to add this here for people subscribed about removal and install of the seals:
http://www.ft86club.com/forums/showthread.php?t=42849

Looks fun, think I'll try this after diner.

Seriously though, thank you for producing this!

[BRZnut]

wow...what a royal pain the in ass! that's for taking the time to do this...very, very interesting.

One quick question for anyone, why do the DIs have a specific number (e.g.#2 in the video). Aren't all the DIs for this car the same???

[Marrk]

Originally Posted by BRZnut

wow...what a royal pain the in ass! that's for taking the time to do this...very, very interesting.

One quick question for anyone, why do the DIs have a specific number (e.g.#2 in the video). Aren't all the DIs for this car the same???

He said in the video that it could be 1, 2 or 3 for these cars. The decision is made at time of build. Not sure why. But if you get, say, a 2, then on your car all four will be 2.

[BRZnut]

Originally Posted by Marrk

He said in the video that it could be 1, 2 or 3 for these cars. The decision is made at time of build. Not sure why. But if you get, say, a 2, then on your car all four will be 2.

Yes but what is the difference between the ones that are 1, 2 and 3??

[Laika]

I wonder if there's any chance we can find out which DI type we have by VIN....

If they can cut me a key from my VIN I can't imagine this would be too much to ask for.

[P@ul]

Originally Posted by WHITE

heres the sound in question, i took two 19 minute videos in wich time it made this noise 5-6 times(one time is iffy as engine rpm drowns it out)

this video was 4 minutes 40 seconds into my first video, just cruising the streets in my neighborhood with no "aggressive" driving. i was coming to a stop sign and heel toed from 3rd to 2nd @ ~3200 rpm. i heard it clear as day in the car too.

what are your thoughts?

Haha, I get that noise all the time. It reminds me of the suction noise off a cold air intake.