Miata Mailing List: June 1999, Message #265

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Hi there.....I have a 1990 and am hearing a high pitched (sometimes 
intermitent) tone when the air conditioner is on and the top is UP.  I went 
on miata.net and looked under noises and low and behold they talk about it.  
It says to change the air conditioner valve under the dash.  I went to the 
dealer to buy this and he made it sound like I was on another planet.  Anyone 
have a suggestion or part number for this valve?  Is it hard to install?  Any 
description where the valve is positioned?  Thank you for your help with this.

Also, Is brake fluid and clutch fluid the same?  

thanks again

Loren Doppelt
1990 RED