Turbo Gt2530 Problems

[Savman]

GT2530 HKS ball bearing turbos have a strange noise coming from front turbo that sounds like bearing is loose. These turbos are reconditioned so they shouldn't have any problems and were just installed them this month. You don't notice the noise when the car is running but when you turn off the engine then you can hear the turbos spooling down you hear the noise. There is obviously no drag on the turbine though because it seams to spin for 40 seconds after engine has stopped. Any advise would be helpfull.

[Amaru]

EDIT: Just read that theres is another noise you are concerned about, not just the normal bearings slowing down noise.

What does the noise sound like? Its hard for us to help you if we have no other information aside from "it makes noise".

Edited September 13, 2006 by Amaru

[Savman]

No it doesn't sounds smooth enough just to be normal bearings slowing down sound. The only way i can describe it is like rollablades when they get a bit of dirt in the bearings and don't sound smooth.

My mechanic said that it could be that the housing was worped from over heating. I wouldn't think this would be true because it doesn't sound like compressore wheel is hitting the side (what i would think it would sound like) also the compressor wheel doesn't seam to slow down at any rate to be concerned about.

I havn't taken the car for a decent drive so maybe the bearing havn't had a propper soak in oil since they were installed?

Other than that does anybody notice noise from their turbos (Non standard).

Later tonight i will be able to write and describe it better, just at work now and doing this on the side lol.....

might even record the noise (NOD)

EDIT: Just read that theres is another noise you are concerned about, not just the normal bearings slowing down noise.

What does the noise sound like? Its hard for us to help you if we have no other information aside from "it makes noise".

[Risking]

I have 2530's as well and experiance the same noise.

They were brand new when fitted and I consider it to be normal noise.

Also had a 2540 on an RB25 with the same noise.

I consider it normal bearing noise while slowing down.

[Savman]

I thought it might be just the turbos seating themselves or something like that. The mechanic told me it was an unusual noise and i would have thought he would have know what one would sound like, normal or abnormal.

I will record the noise and also take it for a decent run on the weekend and see if noise reduces or other suggestions come up.

I have 2530's as well and experiance the same noise.

They were brand new when fitted and I consider it to be normal noise.

Also had a 2540 on an RB25 with the same noise.

I consider it normal bearing noise while slowing down.

[Beer Baron]

well the thing is once you shut the engine off there is no more oil pressure to the bearings. so they are still spinning without any oil pressure. if they are spinning for 40 seconds then possible the cartridge is spinning without oil in it and as such get's a little noisy towards the end.

[yogi000]

i have a 2530 on my rb20 and it makes that similar sound as you mentioned above not for 40 seconds tho....luck if it was 15secs

[BOOSTD]

yep same, normal sound.