S2000 Under The Hood S2000 Technical and Mechanical discussions.

Weird whirring sound at and only at 4500rpm

Thread Tools
 
Old 10-04-2016, 01:56 PM
  #1  

Thread Starter
 
Ap2low's Avatar
 
Join Date: Dec 2013
Posts: 734
Received 19 Likes on 17 Posts
Default Weird whirring sound at and only at 4500rpm

My car developed this weird whirring noise at 4500 rpm exactly. Whether accelerating or decelerating, in gear or in nuetral, clutch pressed or depressed and in any gear.

Started to notice the noise a bit after getting a valve adjustment and installing a ballade sport header.

No cel light, car runs great, mpg are normal.

Sound feels like it comes from of the car, my battery heat shield is on there right, valve cover tight, coil lack cover tight as well. I've tried to have someone rev it while I look around and I don't really think it's coming from the motor itself. I also don't here anything under the car.

All the videos I've seen on TCT failures sound like a grinding sound, while this is more of a hum.

My car is a 2007 with 90k original everything motor wise aside from the bolt ons.

I'm going to upload a video soon
Old 10-04-2016, 01:57 PM
  #2  

Thread Starter
 
Ap2low's Avatar
 
Join Date: Dec 2013
Posts: 734
Received 19 Likes on 17 Posts
Default

Don't see the edit button on mobile to correct my typos but I hope you all understand
Old 10-04-2016, 02:02 PM
  #3  
Gold Member (Premium)
 
windhund116's Avatar
 
Join Date: Sep 2014
Posts: 10,643
Received 1,540 Likes on 1,044 Posts
Default

Maybe header loosen up, after running car? Did you use a new header gasket?

As for editing:

https://www.s2ki.com/s2000/forum-189...y-unavailable/
Old 10-04-2016, 02:07 PM
  #4  

Thread Starter
 
Ap2low's Avatar
 
Join Date: Dec 2013
Posts: 734
Received 19 Likes on 17 Posts
Default

Originally Posted by windhund116
Maybe header loosen up, after running car? Did you use a new header gasket?

As for editing:

https://www.s2ki.com/s2000/forum-189...y-unavailable/
I'll try checking those bolts, maybe on of the lower ones came undone. I did reuse the oem gasket, it was installed at a reputable shop here in Miami called Kab customs and Andres told me the gasket was still good to use, only replaced the doughnut gasket.

Thanks for the link, had no idea!

Here's the video, hope it works. Not the best quality just recorded on my drive home with my cell phone

Old 10-04-2016, 02:09 PM
  #5  

Thread Starter
 
Ap2low's Avatar
 
Join Date: Dec 2013
Posts: 734
Received 19 Likes on 17 Posts
Default

Dammit, sorry here http://s991.photobucket.com/user/jdm...83D77.mp4.html
Old 10-04-2016, 03:38 PM
  #6  

 
Car Analogy's Avatar
 
Join Date: Aug 2012
Posts: 8,102
Likes: 0
Received 1,470 Likes on 1,086 Posts
Default

Originally Posted by Ap2low
Still just seeing a photo at that link, not a video. Youtube?
Old 10-04-2016, 04:45 PM
  #7  
Gold Member (Premium)
 
windhund116's Avatar
 
Join Date: Sep 2014
Posts: 10,643
Received 1,540 Likes on 1,044 Posts
Default

Originally Posted by Ap2low
I got the video. Sounds like a resonance. Either exhaust or sheet metal. Also, check the tightness of heat shields around the exhaust.
Old 10-04-2016, 05:01 PM
  #8  

Thread Starter
 
Ap2low's Avatar
 
Join Date: Dec 2013
Posts: 734
Received 19 Likes on 17 Posts
Default

Originally Posted by Car Analogy
Originally Posted by Ap2low
Still just seeing a photo at that link, not a video. Youtube?
Crap you're right I'm terrible at this lol
Old 10-04-2016, 05:05 PM
  #9  

Thread Starter
 
Ap2low's Avatar
 
Join Date: Dec 2013
Posts: 734
Received 19 Likes on 17 Posts
Default

Originally Posted by windhund116
Originally Posted by Ap2low
I got the video. Sounds like a resonance. Either exhaust or sheet metal. Also, check the tightness of heat shields around the exhaust.
Awesome I'm glad that's what it might be because that's what I thought. When the header was installed they had to shave down the passenger side mount because it was hitting it. Possibly now over time it's come and moved over on it again?
At idle I can see there is still a good 2-3mm space between it hitting but maybe it moves lower?

I will get the car on a lift over the weekend and check it out if this hurricane Doesn't hit Miami lol

Thanks man, will report back!
Old 10-04-2016, 11:50 PM
  #10  
Registered User

 
Xeon's Avatar
 
Join Date: Sep 2016
Posts: 278
Received 3 Likes on 3 Posts
Default

Let me know
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
trAP2
S2000 Under The Hood
7
02-12-2012 08:09 PM
kiid
S2000 Under The Hood
3
05-24-2011 04:44 PM
J.Tran
S2000 Forced Induction
6
10-07-2008 12:52 PM



Quick Reply: Weird whirring sound at and only at 4500rpm



All times are GMT -8. The time now is 02:11 AM.