club.liberty.asn.au

This is the btssm LV from an 04 SG Foz AT I'm helping the local garage with.
Its totally stock and has been enjoyed that way by its owner, what I'd call service abused, basically.

It came to the garage with a totally blown TD04L turbo, lots of oil in the dump and I guess a very rooted journal bearing.
I sourced another 05 TD04L via a Subaru FB group, and after much stuffing around it eventially arrived almost broken through the box and pack with 3 rags. Not impressed.

The garage fitted the turbo, and alas it, or something else is making a grinding rattling noise on boost: the culprit is said to be be the replacement turbo.
Strange since it had little to no play prior to being installed.

I had to check it myself, and went for a quick drive around the block, but I'm basically afraid to go further for fear of doing more damage.
So I'm looking for any advice around these issues.

The mechanic checked that there was oil supply to the turbo.
Apparently they failed to bolt up the aircon compressor before the customer picked up the car, later rectified (!).
The car exhibits a failing drivers side OCV: the angles both reached 10 degrees on ECU reset, but after that its 10 vs 0 or they just give up altogether.

We will likely swap sides to see if the issue follows: meaning failing OCV, if not its oil supply related, probably the thing that killed the original turbo is my suspicion.

So what I want to know is:
Is the car safe to take for a quick freeway log: eg 10klm?
Can anyone suggest the specific parameters to be logged for these issues? (I may have too many params checked)
Could anyone interested take a peek at the logs for insight?



Logs in vague order:
drive around the block
reset ecu and log avcs recal
trying to get the avcs to kick in, in neutral
as above...

Banjo filter on turbo line oil feed - guaranteed

Thanks mick. They reckon they didn't see it when the turbo was swapped out, but my guess is it's going to be in the drivers side ocv banjo or the oil feed banjo at the rear of the rhs block?

The thing is that the filters are black and quite deep in the bolt even if not broken up.
I'm going to try to be present when the swap happens to be sure.

Yep that's where they are

Its definitely the filter

Remove it altogether

The mechanic assures me the turbo was getting oil. He removed the pipe and it "went everywhere".
What are the chances:
It's not getting enough oil, thus the noises on spool?
That the bearings in the replacement turbo got destroyed in less than 10ks of driving?

Basically I'm hoping that the turbo I bought is savable. False hope?

bigBADbenny wrote:The mechanic assures me the turbo was getting oil. He removed the pipe and it "went everywhere".
What are the chances:
It's not getting enough oil, thus the noises on spool?
That the bearings in the replacement turbo got destroyed in less than 10ks of driving?

Basically I'm hoping that the turbo I bought is savable. False hope?

In my experience, turbos don't come back - if it's making bad noises, it's because it's stuffed and needs to be reco'd or replaced.

"Getting oil" is far from getting enough oil, and that's far more likely than a complete blockage.

So being a TD04 its only good for an expensive reco or upgrade... Or the bin?

Bin it. Get a vf46 while you're at it

It may get oil on startup (as you'd expect even with a filter that has shat itself), but under pressure or higher flow it will inhibit flow

Mick

Stock foz stays stock alas.
Thus the cheap s/h turbos...
Just got very unlucky with the first one

Just leaving this here:

viewtopic.php?f=68&t=28387

Low kms, more turbo and for maybe $100 more than a td04 ??

I know where my money would go

My mates sh 4eat foz with dump pipe and a tune (Matt base tune followed by me touching up) on vf46 made 182kw atw on 98 at 18.5psi (jem dyno) and does 0-100 in 4.9 seconds brake boosting to 2500rpm off the line

Mick

Its an SG Foz though so sort of lucked out on a VF46

Needs more VF30 or VF35

I logged it with my btSsm and noticed the RHS OCV was only working intermittently or not at all.
It would calibrate OK, to 10 degrees either side (maybe due to increase oil pressure on startup?) but then the degrees would fall to 0 and the LHS VVT angle would follow suit after a few minutes.

I did get advice that logging the car in this state would be OK as long as I stay out of boost, as I really want to see how the AVCS performs on the freeway.
So this time around, after more logging, the banjo filters will be checked for and removed, the OCV's will be swapped over and the bad one replaced if the issue follows suit.

If its not the OCV, the OCV manifolds (being clogged) or the filter, we will check the cam sensors, leaving the AVCS cams themselves for last.
The replacement turbo will absolutely NOT be installed until the AVCS system is functioning properly.
Luckily this is all fairly easy if all the ducks are in a nice row with a plan, as outlined above.

I bought a lowish kay replacement TD04L from grantdlr, THANKS! and pulled the OCV's from my spare block via Dazzz, THANKS!
The fix will happen in the new year, with a cheat sheet supplied for the mechanic, and hopefully I'll be present to make photos and double check the steps.

You're looking at the ocv's being a problem when in fact it's the banjo filters interrupting oil flow to the ocv and thus throwing out the reading

I'm certain its the banjo filters

Mick

Me too. Agreed 100%.
But yeah if the AVCS can be made to work properly by removing filters & etc. , then the turbo should be safe to be installed.

dr20t wrote:You're looking at the ocv's being a problem when in fact it's the banjo filters interrupting oil flow to the ocv and thus throwing out the reading

I'm certain its the banjo filters

Mick

XT Forester never got filters though