Audi RS2 Turbo whine/failure

**Golfboy666GTI** · 26 June 2013, 20:30

Originally posted by prj

********.

1) The turbo is water-cooled.
2) The car is fitted with an after run pump. Even if you do this, it's not going to cause serious damage. Yes, in the long run it might not be beneficial, but we are talking YEARS here, not a few months.

Do you have any receipts for anything? Sounds like you need a lawyer at this point.

I do have a receipt, its for $800NZD - about $480EUR.
Thanks for your feedback.

**twoqu** · 26 June 2013, 20:50

Surely if he is a reputable turbocharger expert then he would stand by his work with a guarantee/waranty.
Lets see. There was nothing wrong with it in the first place and it had survived countless 0000's km/miles and nearly 20 years of various abuses. He rebuilds it and it lasts less than a month. Hmm.....
Without dismantling it you are not going to find the cause. If you are certain that its not you fault and he is blaming you and not accepting any responsibility, you will need to get an independent report. The longer you leave it and the more you keep driving it the worse its going to get. The RS2 turbo has what appears to be unique components other than the service items which are common to the K26. If any of those are damaged it will be difficult to get replacements or they will be costly.
Call his bluff and ask him exactly how shutting the car down when hot would suddenly cause mm's of axial play in the turbo. That might have been a problem with oil cooled housings and old fashioned oils buts that why the water cooled housings were developed so that coking was prevented.
Can't comment on the standards of the rebuild. Ask him whether genuine KKK (Borg Warner) components were used. I would have thought that the play indicates a thrust bearing issue or perhaps even incorrect replacement of a component from the thrust bearing forward. Without seing inside its difficult to say. If you get it stripped you should be able to identify the components from the links previously posted.
Good luck!

**dunstan** · 27 June 2013, 19:10

Originally posted by Golfboy666GTI

Anyway the turbo guy said that the turbo was fine but they rebuilt it anyway.
.

This says it all. If it was fine,why didnt he just give it back to you.
You need your money back AND a new turbo.

**Golfboy666GTI** · 27 June 2013, 19:50

Originally posted by dunstan

This says it all. If it was fine,why didnt he just give it back to you.
You need your money back AND a new turbo.

He said to check it you need to pull it apart.

**Golfboy666GTI** · 28 June 2013, 03:19

The turbo is now back with the guy who rebuilt it. He asked my mechanic for the wastegate as well. I cant figure out why he would want that?

**LHD_Kid** · 28 June 2013, 06:53

I hope he doesn't come back with "caused by your faulty wastegate..." Does sound like this may be the route he's going.
Good luck!

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**Golfboy666GTI** · 30 June 2013, 23:30

Ive just had a bit of an update for those that are interested.

The guy who rebuilt the turbo says the turbo has been spining to fast which has caused the damage. He asked me about any differences I noticed in the cars performance since the head and turbo were rebuilt. I told him it would only boost to 17PSI.
He seems to think that the something is wrong with the plumbing. Something like a boost leak, crack in the I/C or the DV been put in the wrong way around.

Thoughts?

**prj** · 30 June 2013, 23:40

Even with a boost leak it's not going to fail in a month.

As I said before. You need a lawyer and independent analysis at this point, they are clearly not accepting any responsibility.

**Golfboy666GTI** · 30 June 2013, 23:54

Originally posted by prj

Even with a boost leak it's not going to fail in a month.

As I said before. You need a lawyer and independent analysis at this point, they are clearly not accepting any responsibility.

Its been 6 months, not a month.

The turbo guy is being alright to deal with, though I can see it coming back on me . . Something along the lines that its an old car blah, blah . . .

**prj** · 30 June 2013, 23:56

Well, it never boosted right after it was changed.
So, you can pressure test your car and make sure it does not have any boost leaks.

These turbos are incredibly strong though, they don't fail just like that.
You can abuse them like crazy, run them off the map, run them at 2 bar and nothing happens to them ever.

**jade** · 1 July 2013, 17:47

Originally posted by Golfboy666GTI

Ive just had a bit of an update for those that are interested.

The guy who rebuilt the turbo says the turbo has been spining to fast which has caused the damage. He asked me about any differences I noticed in the cars performance since the head and turbo were rebuilt. I told him it would only boost to 17PSI.
He seems to think that the something is wrong with the plumbing. Something like a boost leak, crack in the I/C or the DV been put in the wrong way around.

Thoughts?

With a boost leak it would reduce boost to spring pressure .6 I think (limp home mode)

**prj** · 1 July 2013, 22:14

Depends on the tune, many aftermarket tunes have this completely disabled unfortunately.

**Golfboy666GTI** · 2 July 2013, 02:24

The car is 100% standard.

They think they have found the issue, and it looks like it could be my fault.
What they found is a kink in the vac line that goes to the ECU. I installed a boost gauge around 3 years ago and somehow its kinked around and pushed up against the a water pipe for the aircon (RHD car).

I guess the ECU couldnt read boost levels correctly due to the limited air getting to it?

**Rusty** · 2 July 2013, 06:56

If it can't read boost then it wouldn't have run properly at all, so that's not it. If it's running stock tune then there's almost no way that the car can over drive the turbo. Tell them to stop looking for excuses, accept the they messed up and get them to fix it FOC.

As prj says, these turbos get abused endlessly and don't fail even after 100,000 km. I run 1.9 bar boost and track the car yet my secondhand turbo has lasted more than a minute...

**UrS4boy** · 2 July 2013, 07:36

Originally posted by Rusty

If it can't read boost then it wouldn't have run properly at all, so that's not it. If it's running stock tune then there's almost no way that the car can over drive the turbo. Tell them to stop looking for excuses, accept the they messed up and get them to fix it FOC. .

If the MAP sensor doesn't get a boost signal, the ECU doesn't control the N75 WGFV and all you get is the mechanical boost from the WG spring, i.e. about 0.6 Bar. They are looking for excuses but that isn't it. They Fk'd up the rebuild. Done. Period.

References:

Moisture Trap info:

quattroworld.com Forums: The UrS moisture trap: How to gain 60 to 70 hp on a stock engine for $3

http://forums.quattroworld.com/s4s6/msgs/20401.phtml

The Audi Enthusiast website. Forums for all Audis including A4, S4, A5, S5, A6, S6, allroad, A8, S8, TT, R8, Q5, Q7, 4000, 100, 200, v6, v8, vintage, local forums

MAP Sensor info:

quattroworld.com Forums: G71 Manifold Absolute Pressure (MAP) sensor information

http://forums.quattroworld.com/s4s6/msgs/20417.phtml

The Audi Enthusiast website. Forums for all Audis including A4, S4, A5, S5, A6, S6, allroad, A8, S8, TT, R8, Q5, Q7, 4000, 100, 200, v6, v8, vintage, local forums

WGFV info:

quattroworld.com Forums: N75 Wastegate Frequency Valve (WGFV) location, function and PN info

http://forums.quattroworld.com/s4s6/msgs/20987.phtml

The Audi Enthusiast website. Forums for all Audis including A4, S4, A5, S5, A6, S6, allroad, A8, S8, TT, R8, Q5, Q7, 4000, 100, 200, v6, v8, vintage, local forums

Audi RS2 Turbo whine/failure

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