brera 2.4 jtdm unusual sound from the turbine [file included]

[thekid]

Here I am .. sorry for the delay in reply ..
The whistle after 4 months that I have it and no one here in the area was not able to fix it I came to understand the provinienza of the latter..
It comes from the exhaust manifold .. that is the gasket between the manifold and the turbo, or the captives of the broken or cracked that connect the manifold to the cylinder head .. if not sbalgio there are 10 , 2 for each cylinder ( 1 above and 1 below).

Can't it be the other by following the simple logic : in full accelerazzione the pressure rises to 1.5 in the range 1400-4300 rpm is still there ..
But the air flow rate (pressure) request after 3 thousand rpm and more than 1.5 bar . glue the map that there is expected to grow to 1.7 -1.8 .. Instead of all this mass of air that is released from the valves to the turbine is dispersed without get there.. obviously not making it turn more .. qnd always remains at 1.5 bar .. Saw that in this regime the geometry opens up the entire flow of the air ignited goes directly to influence the impeller .. ( seen that at low rpm the pressure is obtained thanks to the geometry almost closed)
And then the fact that in the full pull with the presence of the whistle I can smell the fuel in the passenger compartment
Then : this smoke is the result of the false air , that is, one that comes from the valves of the motor is NOT coming to the turbine.. And it is precisely here that blows..
Problem in theory is solved by myself hehe

Also xke can't it be the other !
If it were a sleeve broken not saliva never to 1.5 bar..and then, over time, you would be completely broken ( if the hole or crack was small)
Here, however, the whistle will never change .. even if the past 10 thousand km!

For when about sound dancer to a minimum and the pierburg - Can anyone tell me if it is normal for the air from the decompressor to come out ? 'Cause when we breath in to the tube that goes to the decompressor feel the air coming out somewhere.. while if I aspire to be them' nothing happens!! I will create a vacuum in the mouth ! In comparison , the tubing out from the converter pressure ( pierburg) what not it goes to the turbine , but round that goes inside the intake manifold x then end up in the decompressor...

Thanks to all of you !

Hi there we had heard via **** for the problem if you remember at the time I told that could easily be the exhaust manifolds that were inbarcati even before that I would change the turbo. Know anyway ? a lot of work to do the seal of the manifolds. Strange anyway that sost the turbo have not disassembled the manifolds ???

[sighline]

Hi there we had heard via **** for the problem if you remember at the time I told that could easily be the exhaust manifolds that were inbarcati even before that I would change the turbo. Know anyway ? a lot of work to do the seal of the manifolds. Strange anyway that sost the turbo have not disassembled the manifolds ???

hehe hello dear , of course I remember you removing the turbo have only detached from the manifold.. leaving intact then the side of the head (the part with the studs)

[blackwolf76]

If you have the collectors to bleed, you should find the nuts on the studs lenses, or how can I ? happened several times even someone ? broken in the head, and then not tightening the manifold to the cylinder head, and may bleed and blow the whistle, even if you should hear it at high revs and not to low.

The vent of the tube ? normal... don't worry about that, in case you do not close the geometry and the car is to low it should be like the na One diesel...

[thekid]

if the prisoners of the manifolds are broken ? also need to clear the manifold as baggage.
This work I did on a brera always 2.4 little more? a year f

[sighline]

Will update : I was wrong to the high regard that the exhaust manifold.. Yesterday I removed the cover, turbine, and I saw that all 10 of the prisoners are in place.. asciuti .. no trace of oil or soot
to better understand the situation I studied the map, limiting the turbo pressure and by changing the opening of the geometry
1a test (turbo limited to 1 bar ): no whistle at full throttle is to low to 5000 rpm
2nd test (no limit, but the opening of the geometry set is not in proportion to the pressure required) then I did the changes in full acceleration from 1.5 bar drops to 1.3 and then it goes back to 1.5x then back down to 1.3 and I noticed that the whistle has become periodic , then whistled only when he went up the gauge
in this way, I realized that the whistle is nothing other than the turbine or sleeves
It could also be the bypass valve that is malfunctioning and/or an overboost valve ( also called a converter pressure )
Since this forum is dedicated to ecu tuning, and then my problem does not fall under any of these sections,I tried to ask for help on the 159owners and I've been sent away after the first message on this forum seen their regulation that prevents participate on the forum if one has the machine and/or units changed ( that*******!!!)

Today I got the pipe downpipe bought it on ebay ( to put in the place of the prekat) Monday I'm going to mount it and then you will see if it is the prekat whistling

[ago27]

I took off completely the catalyst to my old golf 4 and beginning to whistle enormously, but I had more extension on the road, so according to me and a question of the exhaust...

[munro]

unfortunately for sighline that whistle of his car ? for anything normal.....
that car,and they know that in a few,in the fitting that carries the lubrication to the turbo port, a filter, so as to prevent the turbine to arrive debris or anything else....now, since not the s? almost none of the presence of this filter many mechanics are equipped with the above-mentioned fitting without check if the filter inside, affixed or less.....
then probably the connection-the filter of the car sighline sar? already the middle clogged and the crowd gets a little olive oil and then the turbo blows that way because l? starved of lubrication, right....
the problem is now ? changing in said fitting now the omelette ? made...
the cio? the bushings and shims bronze or better bearings seen that ? a gtb inside the turbo are now parties then the problem is not solved...if not changing the turbo....
anyway, I hope that I am wrong...because from what I understand the crowd ? warranty....but in cases like this,the incompetence of the assembly,the same does not guarantee the replacement.....

[tidus1985]

munro, but the filter ? inside the pipe or in the first step of the one-piece?

[ago27]

lately I have had many negative experiences with the turbines, the first slit on the road right of the oil in the intake, I had to remove all hoses, intercooler, intake manifold, and clearly the crowd, washed everything with the gas several times to remove all the oil and the impeller of the crowd that had crumbled and slipped on the apertutto, I mounted a crowd regenerated from the same brand a KKK that from the beginning I noticed that whistled darn gunpoint until after 4000 thousand kilometers broke this (this is the oil me throw it out from the drain without inbrattarmi half the world) luckily it was still under warranty, and after the council of he friends here on the forum, I give the shop a garrett at the place of the kkk, which has a slight whistle but I think it fits in the standard.......

[ago27]

I rest the idea he there or to the manifold which is deformed or muffler saw that smell of diesel in the cabin. The fact that it is dry does not mean anything, you have to see if and clean or dirty...