r33 RB25 whining

[Aestysu]

r33 RB25 whining

Hey guys,

Recently bought an r33, pretty standard beside a FMIC, exhaust and a pod filter., but it is making this weird whining/metal sort of noise whenever you accelerate. I cant get a good video of it but i found someone who managed to, but dont visit the forum anymore so i cant ask them what it was!

Video is here

First turbo/import ive ever owned and my knowledge is pretty small when it comes to cars, and for the life of me i cant figure out what the sound is. Car still drives fine, boosts fine (no gauge yet but should be arriving tomorrow) but the noise is really annoying and can be heard over the engine while driving.

Any ideas? cheers

Edited November 29, 2016 by Aestysu

[Coullsy]

Diff whine possibly

[Aestysu]

3 minutes ago, Coullsy said:

Diff whine possibly

Happens when im stationary in neutral as well. Gets louder the more i give it 

[GTSBoy]

Wait.  Is the noise independent of you twirling the steering wheel?

[Aestysu]

8 minutes ago, GTSBoy said:

Wait.  Is the noise independent of you twirling the steering wheel?

Nothing to do with the steering, its pretty much purely when i accelerate, and gets louder the more i give it.

Could be sitting in neutral hands out the window revving the car and it happens. 

[KiwiRS4T]

Belts

[simpletool]

Probably timing belt since that gets whiney and noisy if: 1- the belt is a gates racing or similar. 2 - is too tight. 3 - probably both. Take off the top timing belt cover (after you carefully remove the CAS) and tell us what you see. I'm guessing a blue belt.

[89CAL]

Pull ancillary belts one at a time. I'm putting money on power steering pump or alternator bearing.

Remember: Fan belt also drives water pump so don't run the car too long with this one off

Edited December 3, 2016 by 89CAL
Extra Info

[Aestysu]

thanks guys ill have a look hopefully tomorrow, ran into another issue gotta fix that first.

was driving, then all of a sudden lost all power, and car starts hopping. pretty much undriveable and just jumps every few seconds in bursts. it idles and revs alright in neutral, and also does reverse fine, but as soon as i use the accelerator it just hops around. thinking coils misfiring or TPS?

[Aestysu]

ok so didnt fix the new issue and seems to be worse now. Car turns over and starts, then pretty much instantly stalls, if i manage to start it, it doesnt want to rev past 2500, at first though it was coils/spark plugs but didnt fix it, then found the 2500 limit, so im thinking air sensor.

Cleaned out the maf, didnt do anything, let the car idle while i packed up and stalled, and still wouldnt go past 2500. going to try a new one and hopefully that fixes it otherwise im stumped.

[Dobz]

Crank angle sensor disk rubbing inside possibly? It almost sounds like some thin metal rubbing on something, could explain why it doesn't run properly now.

[89CAL]

I had a CAS with a stuffed bearing that made horrible noises with the cam cover on but fine with the cam cover off. Worth a try. Pull the CAS off and turn it by hand. Should be easy to turn

[Aestysu]

Just put in the new MAF. got rid of the limiter issue, but still have the car jolting on me. Didnt take it for a drive but moved it back and forward in my driveway as a test, was just jolting me forward

[Aestysu]

Fixed all the misfiring and other problems.

But that whine is still there, just checked all belts, was none of those, checked the CAS and wasn't that either. Could it be an exhaust or turbo gasket maybe? the pitch rises the more you accelerate 

[GTSBoy]

Gaskets will whistle only if you have positive manifold pressures.  If by "accelerate" you mean "have boost", then yes, it could be gaskets.