Miata Mailing List: June 1993, Message #64
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   From: fischman@nynexst.com (Gary Fischman)
Subject: Re: re:High Pitch Hissing
   Date: Mon, 21 Jun 1993 13:34:13 -0400


>
> >This may or may not be related, I also have a 91 BRG but with only 30K miles.
> >I have recently noticed a high pitched whine or hiss from under the middle to
> >middle/front of the car.  Especially when in a fast food line where the sound
> >bounces back up.  I have noticed that when I very lightly rest my foot on the
> >clutch, the sound goes away leading me to believe it may be the throw-out
> >bearing.  Any comments/suggestions before I have what had better be warranty
> >work done?
>
> I think that this is the same sound that my Miata makes.  You can really
> hear it well when parked in a garage.  Step on the cluch, and the noise
> goes away.  It happens at any engine speed.  It is very quiet, and under
> normal driving you cannot hear it over the road and engine noise.  But
> drive by a wall, and then it becomes noticable.  I think my car has had this
> noise from the day I bought it.  It's a '91 with 24K miles.
>
> I never took it to a shop, so I do not know if there is anything wrong,
> but I have been autocrossing it, and it seems to be doing just fine.
>
> If anybody has ever taken their car in to be checked for this problem,
> I would like to know what the result was.
>
> Tom Tkacik
> tkacik@adtaz.sps.mot.com
>
>
>
The noise is the throwout bearing.  It's very common.  Mine has been doing it
for a couple of years.  Supposedly, it can be reduced by lubricating the
throwout bearing.  I haven't tried it yet.

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Gary J. Fischman		NYNEX Science & Technology Center
E-mail: fischman@nynexst.com	Wireless Communications Laboratory
Compuserve: 73750,2552		Room: 2C-10
Phone: 914-644-2725		500 Westchester Ave.
Fax:   914-644-2237		White Plains, NY 10604
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