RS2 Turbo - Naked!

[CliveH]

That's serious turbo porn... thanks for posting, very interesting

[alg]

But as i have been informed by Audi dealer that the one with number 034 145 703 D is watercooled, is it OK?? What is the difference between this 2 numbers and can i replace my S2 turbo with any of them??

Tom
How much are main stealers charging at the moment ? And is the price new or exchange ?
A

[tom]

How much are main stealers charging at the moment ? And is the price new or exchange ?

The new one directly from Audi i can get for about 950-1000 Euro.

[alg]

How much are main stealers charging at the moment ? And is the price new or exchange ?

The new one directly from Audi i can get for about 950-1000 Euro.

I was interested as a mate works for the UK Borg-Warner distributor. The cost price of the RS2 turbo is 100 euro

[merlin's S4]

I was interested as a mate works for the UK Borg-Warner distributor. The cost price of the RS2 turbo is 100 euro

Can your mate please get us some???

Do you reckon if we got a group buy together we could maybe get that price down a bit more!?!

[dkw_dude]

Old thread, but anyway: I dismantled the damaged compressor wheel off my RS2 turbo and it had normal thread, not left handed. The rest of the turbo seems ok, no end play and very small amount of radial play in the axle it has done 90000kms (mostly "normal driving" with max boost 1,6Bar) after a complete refurbishing.

I was thinking about betting a fresh comp wheel, or if possible even a K27 wheel to convert it to a K26/27 #6 turbo. But can i reuse the nut and will the turbo need a rebalancing after I put it together? Furthermore where can I get the K27 wheel and housing? Or am I better off binning it and order a Comp Turbo/Garret BB?

[nilo]

That´s a very interesting question and I also would appreciate any info about it. I managed to put my hands in a new K27 from a 964 turbo. Can I use the hot housing of the RS2 turbo and cold from the K27? I suppose I´ll need to balance the whole thing, isn´t it?

Regards

Nilo

[PRA4WX]

Anytime you put a different compressor wheel on a turbine shaft it needs to be balanced. Particularly if you would like it to last long. You could get lucky, but why chance it?!

[Koop]

Old Thread, but i felt i had to mention that the K26/K27 mod isnt really possible without changing the shaft, as the K27 uses a longer shaft, you wont be able to fit the 27 compressor wheel.

[Losgard]

Oh, old but interesting threed.
Thoose cracks in the exhause-turbine seems to coems as standard.
I bought one rs2 turbo in bad condition, Melett didnt want to sell to me because i dont have any balacning machine, wtf?!
Is there anyone at the forum that sells parts or know a cheap shop?
I dont know what the parts name is in english, some kind of bearing is broken in 3 parts and the oil sleve is messed up.

[kwlw]

I dont know what the parts name is in english, some kind of bearing is broken in 3 parts and the oil sleve is messed up.

Broken part seems to be called: Oil deflector ring. And it should be (but not necessary will be) same as other K24 family turbos use P/N: 53241271000. Same goes for oil sleeve which is called oil deflector.

Sau

[Losgard]

Broken part seems to be called: Oil deflector ring. And it should be (but not necessary will be) same as other K24 family turbos use P/N: 53241271000. Same goes for oil sleeve which is called oil deflector.

Sau

Thanks allot!
The turbohouse is from a k26 as i understod, the exhausehouse a #6 and the turbine is some special for rs2. Cant recognice the size from any other k-serie turbos.
Do you know where i can buy those parts cheap?

[chapel]

Ok!
Below is a pic of the repair kit from those nice people at Melett! It includes all the parts needed to attempt a rebuild. You can just see the 360 degree bearing in the bottom righthand corner. I will take some comparsion shots later.
Now before everyone starts ordering bits up, please think about it!
Whilst I hope I have shown that a turbocharger is a relatively simple piece of engineering, unless you have a known undamaged turbo that you wanted to freshen up, there would be little point in attempting a rebuild. Any mechanical damage would need the attention of a specialist. At the very least you would need very accurate measuring equipment, better than I have really. I can only measure down to 1/100ths of a mm.
The problem lies in the way turbos are rebuilt. In order to recover the various components they are machined. So centre housings are bored larger which means they need greater o/d bearings. Shafts are machined undersize which means that bearings with a smaller i/d are used. It's possible that the grooves that the piston rings sit in have been machined as well and there are different size seals to accomodate that too! I have measured as accurately as possible and by a process of elimination been able to work out that I am on std sizes. This was only possible through the patience of the guy at Melett who gave me the relevant dimensions. In fact I need to revise the shaft diameter. I had rather hurriedly measured it at 9.94mm when in fact it was 9.96mm!
I was starting with a known good hotside. That is to say it was undamaged and was not leaking any oil into the turbine housing. Likewise the coldside form the RS2 showed no sign of lekage (unlike the hotside!). I had been patiently waiting for a good RS2 coldside to become available. So thats why I am attempting this. All I needed from the RS2 turbo was the compressor housing, wheel and seal plate. Although interestingly, I have noticed a slight difference in the centre housings. I explain later!

So, in this picture, you show a K24 rebuild kit, but you mention that most of the turbo is a K26... so what's going on there?

Wouldn't you want a K26 rebuild kit if it's got a K26 WC center section?

[FRCFD5]

Not sure if this has been posted yet. Here are the parts numbers for the RS2 Turbo

KKK New Part #
5324-970-7200

KKK Rebuild Turbo #
5324-988-7200

Individual parts:

Compressor housing
5326-191-5160

Compressor wheel 2672GGC/26/2202
5326-123-2202

Turbine housing K24-6.12
5326-101-7388

Bearing Housing K26 D75/51/41 (CHRA)
5326-150-0026

Shaft & Turbine Wheel K24/G
5324-120-5002

[chapel]

which 360° thrust bearing works with this turbo? my rebuilder says he sees no 360° bearing that works with this turbo from Melett