weirdest sound ever...

apapada · 8 October 2003

I started noticing the other day a weird sound coming from the back. Can't tell for sure if it's coming from the engine, suspension or else... Anyway, it sounds kind of like when a rapper scratches a vinyl disk.

The noise is not continuous, rather intermittent. It will do it for 1-2 seconds, then pause for 5 or ten then start again. I pulled over and looked if anything was rubbing against the belts, nothing. When idling, or reving the engine, it doesn't make the noise, which leads me to believe it is not engine related. Even on the road, it does not sound to be RPM related. I also had my wife drive as I was trying to run along and listen but nothing... Anyone any clue ?

thanks

Briank · 8 October 2003

My guess is that its the wear indicators on the brake pads, could be front or the rear but from what you are saying look at the rear brake pads first.

NSX-Racer · 8 October 2003

It can also be a wheel bearing - check if the noise changes when you change directions (the first time when a rear wheel bearing failed at my car Honda Germany sent a specialist to check the noise because my dealer had no clue - the Honda guy then changed the tranny for free! - noise was still there - after 1 month of searching they changed the bearing and everything was okay - I'm sure I could have shorten the procedure if I already would have been on NSX prime at that time)

NSXDreamer2 · 8 October 2003

correct me if I'm wrong, if it's the bearing problem, isn't that supposed to be speed-related?? cuz the noise pitch or even get louder should change when he's at a greater speed...

and... isn't that the bad bearing should be making some sort of humming noise instead of scratchy noise??

NSX-Racer · 8 October 2003

NSXDreamer: First question - yes
2nd question - not necessarily - in my case it was more like scratching.

JIMSBLACK92 · 9 October 2003

I've been dealing with what sounds like a similar sound for months. In my case it seems to originate from the drivers side rear area. I v'e had several people try to diagnose the source and have even replaced the inner cv joint. At this point I am suspecting the outer cv joint even though most people have told me they have not heard of that particular joint going bad as it has less stress put upon it. Inspections have not shown any visisble problems with it.
A local NSX owner/ prime member thats an Acura Tech a few months ago took it for a drive and did one thing you may not have tried and that is: get on the HWY when there is very little traffic and get it up to 65-75 and then turn the engine off put it in neutral and coast so that you can eliminate the engine noise. DON'T TURN THE KEY ALL THE WAY JUST THE ENGINE IGNITION. You don't want to lock up your steering.
In my case I'm gettng so anal about it that soon, I'm going to take it to the shop I use and have them completlely tear the left rear wheels, bearings, brakes, cv joints and anything else that moves and find that $&^%(*@ *, problem

apapada · 9 October 2003

JIMSBLACK92 said:
A local NSX owner/ prime member thats an Acura Tech a few months ago took it for a drive and did one thing you may not have tried and that is: get on the HWY when there is very little traffic and get it up to 65-75 and then turn the engine off put it in neutral and coast so that you can eliminate the engine noise. DON'T TURN THE KEY ALL THE WAY JUST THE ENGINE IGNITION. You don't want to lock up your steering.

I would HIGHLY recommend AGAINST any such procedure as it is HIGHLY DANGEROUS to let a car coast down without any power assist (brakes, ...) from the engine. If all you want to do is have the rear wheels turn that fast, I would suggest putting the car onto stands and do such a procedure with the TCS off, but DEFINITELY NOT on a public road.

apapada · 9 October 2003

Briank said:
My guess is that its the wear indicators on the brake pads, could be front or the rear but from what you are saying look at the rear brake pads first.

you know what ? it could very well be brake related as it appears the sound started after I did my bi-montly ABS stopping maneuvre.

JAYS NSX · 9 October 2003

apapada said:
you know what ? it could very well be brake related as it appears the sound started after I did my bi-montly ABS stopping maneuvre.

What manuver is this and should I be doing it as well?

apapada · 10 October 2003

jmjrdh1 said:
What manuver is this and should I be doing it as well?

Read this :

http://www.danoland.com/nsxgarage/brakes/abs/abs.htm
First Paragraph says:

The NSX anti-lock brake system was one of the first four-wheel independent systems ever produced. Most of the time it works beautifully. Sometimes though, it acts up--this is typically due to lack of maintenance and use. One of the best things we can do to prevent malfunction is exercise the system monthly. By "exercise" I mean go out and engage the system by stopping hard on a wet parking lot, loose gravel, snow, ice... Be careful when you do your exercising, do it slowly and in an open area.

that's what I meant by bimonthly maneuvre...

JIMSBLACK92 · 11 October 2003

And What I suggested is not necessarily "Highly dangerous" if done with common sense and prudence, i.e. no other traffic, clear road weather, etc.

apapada · 30 October 2003

probably found the cause of this problem

you can find here the details of what may have cause this sound.

thanks everyone !

weirdest sound ever...

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