I don't think you have oil in the turbo exactly, it's just that if the turbo can't spin up it accumulates in the intake pipes. Hence the need to regularly exercise the turbo to blow it through.
But if the turbo isn't being allowed to work it can't blow it all out.
That's my theory unless someone knows better.

OK - So where does all this really leave me.

Garage 1, who is a LR specialist said they confirmed with LR that the issue is the secondary turbo shut off valve at cost of £700

Garage 2, LR Service centre has said that the issue is a replacement secondary turbo anyway as there was oil in (Oil was leaking out from the drain tube.....therefore it has a mechanical problem anyway), at a cost of £4,500 plus another is a possible air leak which might be the cause of the restricted perfomance.

Really confused of what to do now having now paid for 3 seperate and conflicting diagnoses....

Any advice would be greatly appreciated here.

Thanks Ash
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Just a stab in the dark, check the filter drain bung that sits directly under the oil filter is sitting on it's locating post. Just take the filter off and have a look.
When they say 'secondary turbo shut off valve' do they mean the cosv?
You can manually manipulate it to see if it will rotate by 90 degrees. Check that the vacuum hose is a tight fit on the actuator.

Thanks Kevin.

Appreciate the reply however the car is at the LR garage so I can't check anything. I could suggest the comments to them but they are supposed to be the experts (having had the car for 5 days)

He said "the turbo has a pool of oil collected in it so it clearly has has a mechanical issue and needs to be changed"... I have no further info than that.

Not being technical enough to challenge them is my problem here - and I hate being in this position, especially as this is the third garage to look at the car and the problem is different to the last place - also a LR specialist. Ash
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It's worth pointing out both suggestions mate.
The bung under the oil filter is a new discovery on these engines.
When mine came misplaced it flooded the intake with oil. If the second turbo isn't regularly exercised, oil can pool in the inlet system hence a possible puff off smoke when it is used. Not all cars do this however.
Good luck.

Thanks Kevin

Apparently mine has the modified drain tube already fitted and was one of the first things they looked at.

The Service guy keeps coming back saying there is oil pooling in the turbo and so there is something wrong with it.

Not sure I have much choice but to move forward - they won't even let me provide the turbo (Direct from Duckworth parts) as we get 20% off..... Ash
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Oil pooling in the turbo isn't the fault of the turbo. If the turbo isn't being used then oil will pool and from what you've posted, replacing the turbine valve would be my 1st step after checking that the drain valve in the oil filter housing is still in-situ.

Thanks Graeme,

I'll suggest this to them but am at arms length on this as the car is sat at the garage, possibly in bits..!

I'm also kinda stuck and wondering if I've lost faith in the LR service centre as I have no idea what they have or haven't done - I do know the car has been losing quite a bit of oil - I assume its related to this..?

Now i'm wondering... if the drain off is in place, oil enters the turbo and finds it way back into the oil system via the drain off...? if its come lose. might that account for the fact i'm losing the oil..??

They also said the turbo doesn't feel right when driving... not sure how they could possibly know as the car trips into Restricted Performance the instant it hits 2,400 RPM (or thereabouts)... so the second turbo never cuts in or only does for a second... while it dumps the oil that had accumulated in it.

I'm temped to take the car back and not have them change the turbo - but then i'm back to square one, having paid 3 times to diagnose the issue, receiving 2 different answers and spent nearly £600.

I wish I was mechanic and could these things myself but this is out of my league to even think about attempting.

Views always welcome....

Thanks Ash
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When my oil filter valve was misplaced it used 3 litres of oil in less than 600 miles.
Just read these suggestions to them. It's got to be worth a try.
Mine was booked in to have both turbo's replaced untill I discovered the fault!!

Thanks Kevin,

Like you, I think I put 9 ltrs of oil over 6 months. didn't spot anything on the drive but also did not see any black smoke while driving - I took it easy as I didn't want to go over 2,400 rpm to avoid the Restricted Performance.

The service place said mine had had the filter pipes upgrade at some point in the past but have not said they checked the drain valve in the oil filter housing is not misplaced - so I will ask them to check that.

Can I assume a new turbo would not come with the Shutoff Valve (COSV).? I believe its possible to check/test the CSOV manually so I think they should check the above drain valve, then test the CSOV before doing anything to the turbo.

and I repeat, not that it should be done often.... unplug the near side MAF sensor and the second turbo kicks in fine - so its not 'broken' (in my opinion) Ash
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Morning Comports,

I think, if it were me I would be taking the car back, I bet if you turn up at the service centre unannounced, it will be sat in the corner gathering dust whilst they charge you for a loan car hoping you will cave and just say get on with it.

I also dont get why they won't let you supply parts either (they just need to say if its wrong or broken not there problem! but it does give them an opportunity to blame something else if it goes pete tong), your the customer. The specialist i use when mine wa rebuilt I supplied 90% of parts from Duckworths no problem at all. Saved me a small fortune and they were happy with that.

I have given up with main dealers and service centres, they don't want anything complicated nor do they seem to have the experience or expertise, they price difficult jobs high as they dont want them. All they want is quick turnaround service jobs that they make a small fortune on.

DrF

Last edited by DrF on 21st Jan 2025 1:56pm. Edited 1 time in total

Hi Ash, I have an L322 but I presume the COSV is in the same place as yours.
It's near the bottom of the radiator on the engine side.
I'm realy surprised if a specialist won't think to check out the basic items and their location.
The oil filter check would take less than a few minutes and the COSV similar once the under covers have been removed.
It's good old fashioned mechanics work instead of being told what to do by a computer!

To be clear, the CSOV shuts-off the intake air to the secondary turbo whereas the turbine valve shuts-off the exhaust at the secondary turbo.

I wonder why unplugging the MAF sensor for the secondary turbo brings the secondary turbo to life. Are the contacted mechanics aware of this behaviour? Is the MAF faulty?

Check the effect of swapping the MAFs.

Thanks Graeme, it is CSOV, crossover shut off valve. Always spell it wrong!!

Thank you all.

Another phone call to the Dealer Service Centre is in order i think. I get to speak to their service manager so perhaps a request to speak to the engineer would be a better move.

I want to know that the above, simple things, have been checked before they proceed any further.

I am tempted to go pick it up - and start again. Drf, I know you trust the guys local to me. I did call therm before Xmas and was waiting a call back that I don’t believe I got (or maybe missed) so when I get it back I will try therm again.

Graeme - The sensors were swapped across early on to see if it was a duff sensor - but it wasn’t. I suspect pulling the sensor does not bring the turbo to life per se.. more that when it does fire up, there is no sensor to pick up an issue straight away and therefore doesn’t put the car in restricted performance - It drivers well and I believe the turbo still kicks in and drives well - with the MAF plugged, the car trips in RP and at that point, any pressing of the throttle makes the car sound like an old rattle can, running on 3 cylinders (best description I can think of)

Which also make me think the turbo is functioning fine… something else is tripping into limp mode. Ash
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