AVCS VVT angle out of sync diagnosis MY07 GT B

[cynner]

Dumb question re: the banjo bolt. Does it matter what way the hole is facing when the bolt is tightened? (I'm assuming not - but would at have any affect on the oil flow at all?)

Kim

[KiDo_Tuning]

Dumb question re: the banjo bolt. Does it matter what way the hole is facing when the bolt is tightened? (I'm assuming not - but would at have any affect on the oil flow at all?)

Kim

Wont affect it due to the way a bajo fitting works etc

[cynner]

Matt - in your "Let's talk tuning" thread, you mentioned maybe there is a simple fix to prevent the OCV issue re-occurring? (a diode or something?). Or shielding of the drivers side loom? Wondering if you have any updates on this?

[dr20t]

An update on this from my experience in the last two days

This is not on my car its a mate of mine.

Sh9 09 forester

Ej255 with td04l turbo

Blew the turbo and spat error code. Towed it to a mechanic mate of his who checked the code and told him its the turbo and boost control solenoid. Cleared the code

Brought it to my place today where we changed the turbo to a very good condition vf46.

Started the car, was fine, drove it around with a new tune to suit the vf46. Was logging boost and knock / afr and it was all good. coming back home spat an error code. Stopped immeiately. Learning view was taken and revealed p0021 intake cam over advanced. When my mate saw the code he said the mechanic mentioned this when he checked the codes for him but said it related to the blown turbo and there's nothing wrong with the cams.

The mechanic 'mate' stuffed him. Anyway , drive back around home , hear some nice noises and voila the second, newly installed turbo is now blown...

My theory is ocv has shat itself and send metal into the turbo oil feed.

Will be taking both banjo filters out tomorrow (fun) and replacing turbo. As well as throwing in new set of avcs solenoids.

I'm also going to drain the oil and take the sump off to check for metal paricles just in case its now in the entre lubrication system. Will be doing a complete flush either way

Be aware guys this problem can pop your turbo and potentially your motor.

Mick

[cynner]

Ouch! Not good
If an OCV solenoid was completely shut, would this affect oil flow to the turbo?
The OCV's look pretty strong - I'm not sure the parts move enough to actually break off. Perhaps the OCV error is a symptom of the same thing causing the turbo to die - maybe not enough oil pressure getting to the OCVs or turbo?

[bigBADbenny]

It doesn't add up but I'm not a Foz expert.
Blocked filters is an issue on preFL because their avcs oil lines supply the turbo.
Blocked lines = oil starved turbo.

I've looked at the lib my07 WSM and the turbo appears to have its own dedicated oil supply seperate to the OCV's.
Plus no filters.

The OCV's are of very heavy duty construction - never heard of them actually breaking.
The avcs cam gears can jam and have some small pins and components...

I'm sure the imminent teardown will reveal all.

If there is metal etc in the sump, it's best to also replace the oil cooler which can trap particals...

[dr20t]

Well did some logging before pullin it all apart. Intake avcs angle was 0 acros both banks.

In the process of pulling it all apart.

Benny I can confirm that on the ej255 i have at home from the my08 gtb parts car has the oil feed connected to the ocv and the banjo filter is half way down the line and bolts into the head.

I haven't taken the 09 foz one off yet but I'm pretty sure it will be the same

Sump was off - no metal shavings. I have a feeling its a blocked banjo filter causing it

Mick

[bigBADbenny]

Intriguing. Where do I look for that?
Let us know what you find in the filter... If anything...
Now I'm gonna have to find that oil distribution diagram from the WSM.

[dr20t]

Ok so problem perceivadly solved

Banjo filter was pretty much completely blocked. Compared it to the spare ej255 banjo filters and they were clear as day. Ripped the banjo filters out completely. Hopefully solved the issue

Thanks for any help

Mick

[cynner]

Nice one! Shame it caused so much carnage Is it easy to remove/inspect without having to dump the oil?

[dr20t]

Two turbos ain't too much carnage - thankfully I had a spare turbo

Need turbo off unless you're super skilled to get to the banjo bolt under the inlet manifold and inlet pipe (it bolts to the head)

[bigBADbenny]

So what component is that banjo bolt filter closest to?

[dr20t]

Hard to explain Benny but its on the block side of the inlet ports on the head, about 3/4 of the way across the head toward the turbo

[bigBADbenny]

I get it!
I've been sussing out which Infamous filtered turbo oil feed line to get and that kinda answers it for me

[<GB>]

http://forums.nasioc.com/forums/showthr ... ?t=2600116

Not that it helps us being far away