Hi,

 

I have a problem with my new Z32 TT I've just bought a week ago, earlier today it started making a very loud whistling noise under load/in boost. It sounds like a police siren (note/pitch raising with boost and dropping when dropping out of boost).

 

I thought it might be a boost leak but have checked everything I can get to and no problems I can see, and the noise seems to be coming from around the RHS turbo area.

 

Any help/advice would be greatly appreciated. Thanks is advance.

Hi,

 

I have a problem with my new Z32 TT I've just bought a week ago, earlier today it started making a very loud whistling noise under load/in boost. It sounds like a police siren (note/pitch raising with boost and dropping when dropping out of boost).

 

I thought it might be a boost leak but have checked everything I can get to and no problems I can see, and the noise seems to be coming from around the RHS turbo area.

 

Any help/advice would be greatly appreciated. Thanks is advance.

 

is there any chance with the help of someone that you can get the sound recorded, its bad enough trying to help diagnose something at the best of times, but with sounds its always better to have a recording of some type.

 

If need help to upload it once you have the recording, use photobucket as you can upload videos / audio and image files to it.

 

forgot to add, do you get any smoke from the exhaust, could be the start of one of the turbos seizing.

Edited January 1, 201213 yr by vodkashots

Ok, hopefully this will work.

 

 

The pater on the sound track is rain on my coat btw

It boosts just fine, no smoke, no oil leak, everything is running great . . . apart from the noise. :crying:

do you know if its got uprated turbos on it? sounds like very loud turbo spool up, do you get any smoking from the exhaust, discounting the condensation you get this time of the year, it will have a blue tinge to it if its oil and you will be able to smell it as well.

 

EDIT doh! you answered while i was typing out my reply lol

highly possible boost leak mate

No smoke, a little steam when it starts up for a min or two which goes away.

 

I've been driving it for a week and its been pretty quite and all of a sudden its really loud, video doesn't do the volume justice really. That's why I thought it could be a pipe popping off somewhere.

 

I don't think it has uprated turbo's. It does go though, pretty chuffed with it.

Just listen to the vid. could well be a dry pully bearing or its collapsed?

One thing I will add is I think it has more lag since the noise started, but that may just be me being paranoid.

Is the pulley bearing at the front below the cam-belt/cams?

 

The sound defiantly seems RHS turbo region because its louder if your under the car and the further back you go (towards turbo) the louder it gets.

I had a similar problem... no blue smoke, just a grinding noise... my o/s turbo catastrophically failed.

 

I can't see the video for some reason though :s

Do you get the noise when the car is staionary and you simply rev it?

if so at what Revs does it start?

 

smithy

I can get it to make the noise when not under load. The video is just me on my drive. It doesn't do it at a particular rpm only when I get to about -3psi up and under load it seems to get quieter as the boost goes up.

 

I do have de-cat pipes if that makes any difference.

 

There's no grinding noise, it's more of an air noise opposed to a metallic bearing noise.

 

When I drive normally, i.e cruzing at 70mph on the motorway it doesn't make any noise at all, till I get to a hill and then it starts whistling as I have to press the accelerator harder and the boost level rises.

Could be a worn turbo thrust bearing allowing the compressor wheel to touch the housing, which may account for the lag.

 

Paul

Turbo gasket maybe or a gasket near turbo i had this on a s13 once.

Another development, was driving the car today and no noise what so every for about 3 minutes, then as the car was warming up, it started and as it was getting warmer it got louder.

 

Till up to full temp it was the loudest, also on full boost it gets very quiet. Only around -3 to +3 psi it makes the noise really.

Good news . . . kind of, I've found the problem. Yes it is the turbo and the reason it's make the noise is because I have no oil. Checked it on the 31st Dec was on the high mark, now 2nd Jan doesn't even register on the stick. Going to top it up now and drive, if noise is gone we have an answer.

 

So the question now is . . . any likely culprits?

Hope c**p no need for a drive put in about a pint of oil and half of it has landed on the drive dripping out from under the RHS turbo. Feed/return pipe seal??? Surely can't be anything else!!!

could be your oil feed pipe split or return if your lucky, dont sound like a seal because your not burning any oil

Just looked at what I believe are oil feed lines which I've circles blue. Dry as a bone.

 

The oil is sitting on the turbo circled red but under the shield. Could there be a leak from above circled green.

 

 

Any ideas? :crying:

ive been lead to believe the zed turbos are water cooled so id guess one of those lines in blue would be the water feed with the returns on the bottom although im not 100% as ive never taken one to bits

 

But i would say IF the left hand feed line was oil then if it were to pop off or split it could spit oil all over the place including were you have you puddle might be an idea to top up the oil start the car and see if you can see were it coming from or more likely feel were its coming from lol

You don't need to start the car, it just pours straight out :scared:

 

I'll give that a go tomorrow and see if I can locate the problem.

 

Does anyone know where the oil feed pipes are then?

Are these the oil lines? (Circled Red)

 

more than likely they look a bit too heavy duty to be coolant lol

even if the pipe had corroded it still wouldnt drip as you topped the oil up.get it on a ramp and have a look.may be a corroded sump by the sounds of it.

Ok so I took it to my local gaarage, told them all i knew and a day later they said that it's:

 

1) Rocker cover gaskets leaking oil

2) Sump gasket leaking oil

3) Turbo oil feed pipe leaking oil

 

They said it's a specialist job so recommended it to Nistek (Nissan Specialists)

 

After going to Nistek they said nope it's none of those its:

 

1) Likely turbo's knackered

2) Head gaskets leaking oil

 

But neither garage want to touch it cos it's too difficult for them, with their manuals and hydraulic ramps and specialist tools.

 

So it looks like I'm going to have to pull the engine and have a look on my drive with just a jack and some spanners. If I can do it, why can't they?

 

How do mechanics seriously get a job I'll never know? :no: