noise. Please help to diagnose

[thorny]

It happens the most when the engine ends it's cold start and goes into normal operation. It then goes away

[crispy tofu]

that doesn't sound good. send it back to ESS to have it checked.

[thorny]

I asked Roman. Waiting reply.

[tinman831]

Stop driving it please.

[thorny]

Originally Posted by tinman831

Stop driving it please.

I did

[tinman831]

Hopefully it's just something rattling.

[AlpineE92M3]

That does not sound healthy

[GOLFFRR]

def sounds like something loose. Im sure Roman will be able to get you set up with what you need.

[Beedub]

to me that just sounds like a resonance rattle, something is most like fowling the underside of the intake I'm guessing as you can hear it speed up etc.

[per]

I have a similar sound for a couple of months, but i only hear it when i lift of the gas and the car shifts from 1-2 gear and 2-3 gear, it disaperes completely when the motor is varm, my guess is thatit has something to do with the vanos system, cold oil= not oilpressure enough for the system

[thorny]

well, for the past two days I have not been able to replicate the problem, no matter what I tried... The motor sounds and operates as normal :

[JEllis]

Check the bolts holding the SC to the bracket. Also, check the the three bolts holding the bracket to the engine. If the bracket and or SC were loose then that might create a noise like in the video. You may also want to check the pulleys and make sure they are not loose. Next, check the pulley on the SC itself. Finally, its possible it could be the SC itself.

[tinman831]

Originally Posted by thorny

well, for the past two days I have not been able to replicate the problem, no matter what I tried... The motor sounds and operates as normal :

Have you done any maintenance or mods lately? It sounds like a loose heat shield or something.

[thorny]

Originally Posted by JEllis

Check the bolts holding the SC to the bracket. Also, check the the three bolts holding the bracket to the engine. If the bracket and or SC were loose then that might create a noise like in the video. You may also want to check the pulleys and make sure they are not loose. Next, check the pulley on the SC itself. Finally, its possible it could be the SC itself.

Good idea to check the tightness of those bolts. I am almost certain it wasnt the sc. Now i got stethoscope and probably can say for sure, if the darn sound returns...

Originally Posted by tinman831

Have you done any maintenance or mods lately? It sounds like a loose heat shield or something.

No, nothing on the engine lately. Unless new wheels and tires count. Pretty happy with the current power setup

[JEllis]

Originally Posted by thorny

Good idea to check the tightness of those bolts. I am almost certain it wasnt the sc. Now i got stethoscope and probably can say for sure, if the darn sound returns...



No, nothing on the engine lately. Unless new wheels and tires count. Pretty happy with the current power setup

Other simple possibility is the clearance between your SC and the wheel well is very tight and is rubbing every once in a while. Look behind the SC where it gets close to the metal wheel well. I probably only have 1/8" clearance on mine. If you are rubbing in that area, it should be visible.

[Groundpilot]

Originally Posted by thorny

I asked Roman. Waiting reply.

Did Roman respond?

[tom @ eas]

Assuming its related to the drive belt accessories, try removing accessory belts and idling to isolate the noise, replacing belts one at a time.

Just looking to eliminate variables at the moment.

[thorny]

Originally Posted by Groundpilot

Did Roman respond?

Yes, but I need the sound to come back to follow everyones suggestions.

Roman's troubleshooting recommendation was unhooking a small hose that connects to the bypass valve to see if the noise goes away at idle.

[Groundpilot]

Originally Posted by thorny

Yes, but I need the sound to come back to follow everyones suggestions.

Roman's troubleshooting recommendation was unhooking a small hose that connects to the bypass valve to see if the noise goes away at idle.

I had exactly the same noise on my brand new SC ESS-550 kit with only 100 miles on it. I didnt record that sound, but yours sound the same. I am going to my installer on wednesday and will let him listen to your video and report back with his findings. It only hapened once, i am keeping an eye on it, but it seems to be fine now.

[Groundpilot]

Originally Posted by JEllis

Other simple possibility is the clearance between your SC and the wheel well is very tight and is rubbing every once in a while. Look behind the SC where it gets close to the metal wheel well. I probably only have 1/8" clearance on mine. If you are rubbing in that area, it should be visible.

I looked at mine and that space is very tight. Maybe metal to metal contact causes this noise

[sales@ESSTuning]

Originally Posted by thorny

Yes, but I need the sound to come back to follow everyones suggestions.

Roman's troubleshooting recommendation was unhooking a small hose that connects to the bypass valve to see if the noise goes away at idle.

Sometimes if the vacuum going to the bypass is interupted it can cause the valve to rattle which resonates thru the manifold area when at idle or coming off boost. Hard to tell from the video but considering that it is random as you said it could be a metal vibration from this or contact somewhere in the engine bay.