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Discussion Starter · #1 ·
Ok, just interested in anyone's experiences/thoughts on the freeing up of VNT vanes without using Mr.Muscle.
I'm suffering from a reoccurring limp mode caused by sticking vanes on the turbo.
I'm looking at possibly trying a technique the same as used in the "Revive" turbo cleaning method which is basically

The below process is done on a cold engine to prevent the cleaner from evaporating.
1. Run the end at 2000rpm while injecting 250ml of cleaner post MAF sensor.
2. Drop rpm to 1800 rpm and inject another 250ml of cleaner
3. Switch off for 2-3 mins and allow injected cleaner to soften the deposits.
4. Run again at 2000rpm and inject the last 250ml of cleaner.
5. Take for a short drive.

If anyone has tried the link below on a 159 I would like to hear about it.

https://www.youtube.com/watch?v=pAJSOsIbqyc


Just wondering if anyone had tried anything similar? I have access to a reasonable amount Ardrox Gas turbine compressor wash fluid which is used for a similar task. Even if it takes 5-10 repeat operations to improve what I have., it would be easier than ripping the turbo off!!!!

Cheers Dave
 

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I think it's BS for a very simple reason.
VNT vanes are on the turbine side of the turbocharger, air intake is connected to the compressor side - only connection between those two sides is a shaft joining compressor and turbine wheel.
Also it's potentially dangerous for the engine - you only need 20ml of liquid in the right place to hydrolock the engine on top of that you are going to spray cold water on the turbo.
 

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Discussion Starter · #3 ·
Ah....kind of understand your point, but with the engine running at 2000rpm and the cleaner sprayed in a "mist" into the induction after the MAF, I'm assuming it enters the compresssor then onto the intercooler, then inlet manifold, through the cylinder, exits via the exhaust manifold and out through the turbine of the turbo.

It sounds like they are relying on the moisture content of the system being high enough to form a "steam" which in turn softens the deposits.

Just wondered if anyone had tried a similar method and seen any results.

Dave
 

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All of the stories I've read about cleaning the vnt assembly in place have involved removing the down pipe and applying it directly to the turbine side of the turbo, your not going to spray it into the intake with the engine running are you.?
The Ardrox comp wash we use where I work is just a degreaser mixed with water, its designed to remove fuel system inhibiting oil residue after an initial start up, I dont think it would have much effect on a build up of carbon.

What Aero engine shop do you work at.? I'm at GE Aviation Nantgarw.
 

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The fact that they say it's non-toxic and do not provide MSDS for it means that there is not a huge choice of chemicals that they can be using in there and even less if you consider the fact that it has to go through the engine (close to 0, as most of the stuff will break down once heated to 2000C that you get during combustion).
Steam produced by the engine might be the only thing in it that has a chance of working, so you might as well spray some tap water in there - just be careful to not spray too much.
 

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My car is going into limp mode with the most likely cause being sticking VNT turbo vanes.
I have tried the "revive" process, but unfortunately it didn't clear the problem, so with hindsight it was a waste of money.
That said, it may be worth a go if the next step is a potentially big bill.
For me, the next step in the "Mr Muscle" process and manually working the acutator.
(Car is a mk5 Golf with 125k)
 

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Jacek already stated this will not work....

The VNT mechanism is on the exhaust side of the turbo not the intake side so nothing you spay down the intake is going to get anywhere near it.
 

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Oven cleaner might work if you can get direct access to the turbo, as said above the components in the spray would have to survive combustion to have an effect on the exhaust side of the turbo. Now there is someone who has not long ago taken his turbo off for an upgrade who might be able to test the oven cleaners on vnt ... Jay...
 

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Would it be possible to drop a 'load' down the EGR pipe (the one below the EGR), if your egr is blanked it Will then go through the turbo. Just turn it over a couple of times to blow it through.
 

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Would it be possible to drop a 'load' down the EGR pipe (the one below the EGR), if your egr is blanked it Will then go through the turbo. Just turn it over a couple of times to blow it through.
That actually has a chance of working - but you need some serious chemicals to do the job.
It is also very dangerous, as EGR is piped into exhaust manifold, so you will be filling the manifold, head and potentially cylinders with liquid (which is a bad idea as i've had a chance to find out) before it even has a chance of getting to the turbocharger - and then you have to make it stay in there for long enough to do the job.
Then whatever chemicals you use to fill your turbo and exhaust system with, have to leave somehow - it's not going to be easy if it has to go through the DPF.
It might actually be easier to disconnect the exhaust and fill it from that side.
 

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Why do not you bring turbo to turbo- specialist to test if you really suspect problem.
It cost of course but you get a clean, repaired and balanced product back under warranty.
I did. Still no complain.



 

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Oven cleaner might work if you can get direct access to the turbo, as said above the components in the spray would have to survive combustion to have an effect on the exhaust side of the turbo. Now there is someone who has not long ago taken his turbo off for an upgrade who might be able to test the oven cleaners on vnt ... Jay...
Old turbo in the garage so can "test" products but not at my own expense I might add ;)
 

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I've posted a comment under that revive video, asking how is it supposed to work - they've deleted it, so i've posted it again and they've deleted it again. So obviously even they know it doesn't work.
 
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