Jump to content
SAU Community

High Pitch Noise

7yphon

By 7yphon,
in Engines & Forced Induction

 Share

Recommended Posts

7yphon Experienced

7yphon

Posted
Posted (edited)

Its only just started in the last few months and Ive been switching and changing shit, the only thing left to change is the turbo, but before I do this I want to rull something out.

It only starts when the engine is under load and doesnt always happen

me and my mates have been looking for leaks and we cant seem to find any

I have also changed the belts but it seems to be comming from the Turbo side

I have pulled all the pipes of and checked the turbo for any play and its still like brand new no movement.

Now I put 10w40 Minerial Oil in my car as a test so im hoping this hasnt caused the issue I was a little worried at first.

Any Ideas I took it to hyperdrive they said turbo, but they didnt really test anything they just heard the noise, and I took it to another macanic and he said it is possable the turbo, But if thats the case what in the turbo is making the noise?

It does sometimes happen when it nutural but not all the time.

Also there are two holes on the turbo on the exhaust side, Dont know what they are for but I have put two plugs in one keeps falling out but I think I have this one it tight could this be where the noise it comming from?

Edited by 7yphon
Link to comment
https://www.sau.com.au/forums/topic/132869-high-pitch-noise/
Share on other sites
Mr Italy! Proficient

Mr Italy!

Posted
Posted

Mine makes a kinda whistle from the turbo side of the car since i installed the splitfire coilpacks. It only really does it when im boosting, so i'm gonna assume mines turbo related - but you say yours sometimes happens on idle...

strange

Godzilla32 Veteran

Godzilla32

Posted
Posted
Mine makes a kinda whistle from the turbo side of the car since i installed the splitfire coilpacks. It only really does it when im boosting, so i'm gonna assume mines turbo related - but you say yours sometimes happens on idle...

strange

I had a chipped turbine blade (ceramic) which made a shrill/squealing noise. Only on full throttle though. Only takes a tiny little chip on a blade to throw out balance (im guessing) and cause a noise.

Hope this helps.

Deren

kasanoff Collaborator

kasanoff

Posted
Posted

I sometimes hear a high pitched sound - always low revs and at a particular load point. If I push the throttle or ease off it slightly, sound disappears...

Kinda sounds like a feedback noise when you hold a microphone too close to a speaker...

Is that the same as you guys?

Mr Italy! Proficient

Mr Italy!

Posted
Posted

^ haha no shit, mine does the same too! This is bad, two annoying sounds in the same thread and my car shares both of them.

The mechanic told me its the grease used on the starter motor catches dust and gets stuck after its done its job - he said a rebuild will fix it, using silicon grease so it doesnt stick to dust.

But my high pitched sound is exactly as kasanoff described. Happened after the Front mount and coilpacks...

7yphon Experienced

7yphon

Posted
  • Author
Posted

Mine doesnt always happen tho and only when at full boost and when the car is under a lot of strain but yer its a high pitched noise seems like im not the only one with this sort of issue :D

also yes it is imbarrising when you go flying past a car with a screeeeeeeeem comming from the engine

gtst25 Proficient

gtst25

Posted
Posted

If it's a screaching sound when it comes onto boost I'll put my money on an exhaust leak. It's pretty common on the rb20's to leak between the exhaust manifold to turbo gasket.

If one of those bungs you mentioned falls out all the time I'll bet that's what it is.

Some guys have pulled all the heat shields off etc and have found the turbo loose and with only one nut holding it on. I had a high pitched screeching noise on my rb20 when it came onto boost and that's what it ended up being.

Cheers

dead32 Mentor

dead32

Posted
Posted

my turbo sounds like a arnold swarzeneger with his nuts in a vice, realy high pitched from bout 3500 rpm (full load) i just figured steel wheel plus 18psi would make this noise, could also be the fact the internal gate bleeds off, possibly your internal gate is bleeding off cause high amounts of boost to be leaking under presure past the wastegate plate, does your boost hold solid? what amount of boost you running?

Rolls Grand Master

Rolls

Posted
Posted

My turbo also does this, a high pitched shreiking noise. Sounds like the turbine is scraping the housing or something, Only happens when you go from zero boost to full boost very fast eg on a gear change. Sounds like a wave as well, like itll do it for half a second then fade away and then fade in again. Ive got a split pulse dump pipe as well, so its possible its just weird turbulence or something.

Im assuming its the turbo being on its last legs but Ill wait for the exhaust wheel to end up in the cat before I change it.

otto Collaborator

otto

Posted
Posted
I sometimes hear a high pitched sound - always low revs and at a particular load point. If I push the throttle or ease off it slightly, sound disappears...

Kinda sounds like a feedback noise when you hold a microphone too close to a speaker...

Is that the same as you guys?

mine does exactly the same started doing it once i put on a pod so im guessing its because of the way the air goes through the pod at that particular point causes a whistle its definatly not a problem or because anything is shagged and i wouldnt be doin any major component changes to fix it

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Dose Pipe Sutututu
      S1 rb25/s14 starting problem

      By Dose Pipe Sutututu · Posted

      When you crank your car, and hit it with a timing light, can you see a steady crank timing?
    • PranK
      My BMW E39 528i touring

      By PranK · Posted

      Oh, forgot to add, A few months ago I was getting mixture codes and the car was using crap loads of fuel. You could smell the unburned fuel in the exhaust, it was crazy strong. Economy was over 17.5 l/100 and usually around 19. I smoked the engine and found a leaky CCV hose which I replaced and then I replaced my two pre cat O2 sensors, I also replaced the MAF. This fixed my mixture codes and improved my exonomy but I'm still 14 - 15 l/100 when pottering about town so something is still amiss. Throttle response is much better and it has more pep but I'd like to know why it's still so thirsty (and I'm hoping that whatever it is gives me a bit more poke).    
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      Car is on factory injectors/z32 maf/ q45 throttle body/ z32 ecu with nistune 
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      Hello all, currently finishing up a rb25 swap into my s14. Having issues with starting, car has spark (confirmed by pulling a plug and watching it spark), has fuel(confirmed by checking pulse/voltage at injectors all spark plugs are soaked in fuel). Car cranks over and pops into the exhaust with a heavy fuel smell but no attempt to start or run, I have torn the timing cover off and triple confirmed timing, turned the CAS in multiple spots both directions, attempted to start with coolant temp and maf unplugged, checked my fuel lines and made sure they weren’t backwards, checked voltage at cas/injectors/coilpacks, made sure all the grounds in the harness are connected and added a few grounding straps (1 from chassis to block, 1 from chassis to head, and 1 from chassis to igniter chip) I am getting stumped here. As a last ditch effort I made a full grounding harness tonight that’s going to run from the battery and add an extra ground from the battery onto the coil pack harness/igniter chip/ intake manifold/ Wiring specialties harness ground/ and alternator. I’m hoping maybe the grounding harness will fix it here but posting here to see if anyone has any other ideas on what else I can check. My fuel pressure is unknown right gauge will be here tomorrow.  IMG_3206.mov
    • CRSKmD
      R32 Sedan - Grip and Drift (have my cake and eat it too build)

      By CRSKmD · Posted

      yeah I was shocked when I checked my spare OEM on and as below that's how they come from Nissan. (side interesting note new NEO gearbox and replacement park lack the brass bush on the tips and its just all alloy) unsure about damage to the box currently back at 1110 to be pulled down/inspected and selector fork replaced as he built it previously and given the never before seen failure on his billet forks he is replacing it under warranty. He said he has used always OEM the keyway tab without issue for years so it could be an unlucky coincidence. I did talk to him about the sharp corners and stress concentration too. Re: hard shifts i got 7+ years out of the OEM one and the fork itself failed not the keyway. so could be bad luck as I said or an age thing + heat cycles in box and during fabrication of billet?
×
×
  • Create New...