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Dee
12-30-2009, 07:35 AM
I've been getting a loud intermittent squeal for a couple of months now. Doesn't seem to matter if the clutch is depressed or not or if the AC is on or not. The noise finally happened as I was pulling into my yard last night and my husband says it's the throwout bearing.

This forum is sure a good tool - I was able to find out how long it's been since I changed the clutch/throwout bearing etc.

http://www.miataclubofhawaii.com/forum/showthread.php?t=1216&highlight=throwout

Reading the old post brings it all back. I ended up with a new clutch kit from Checkers. A friend on Maui who used to be a race car mechanic did the job. Have not noticed any problems with the clutch until this noise. Maybe I got a bad throwout bearing.

And I just turned over 100,000 miles yesterday! Which means this clutch only has 6,000 miles on it (haven't driven the car much lately until I went back to work in October and now I'm driving it 30 miles a day.)

ANYWAY here's the question for you guys: since the clutch doesn't seem to be slipping is it OK to drive it while I order parts etc????? Or should I park it for now?

gtxhawaii
12-30-2009, 08:32 AM
Could well be the pilot bearing. A throw out bearing should not make noise when the pedal is in the full up position. Same work to access, the part is cheaper.
The alternator and power steering pump as well as the water pump are known to squeal as important bearings wear and start to catch and rattle around in their outer housing. Getting it to squeal when the hood is up and experienced ears are right there is Not easy, but tells the story. Alternator and PS belts are common Miata squealers too. Water splash connected at times but can be loose belt adjustment.
If the noise doesn't get a lot worse, like Constant, probably OK to drive for now. Again, I'm doubting it's the throwout bearing, which would be the least worry driving. Water pump is critical, PS optional, Alternator not so bad as you work not far from home and can get back on the battery. Pilot bearings fail totally and don't usually take anything with them.

Dee
12-30-2009, 08:57 AM
Thanks, Bill. Although the noise is intermittent, when it does happen, it doesn't matter if the clutch pedal is in or out. So it must not be the throwout bearing. Which means I'd better not chance getting stuck on H1 or H2. I'll keep it close to home until we can diagnose it better.

driver
01-03-2010, 06:18 AM
Take a look at the Technical Service Bulletins (TSB)
http://www.miata.net/garage/tsb/index.html


Squeek from Transmission on 1990 to 1992 could even be this extension housing oil seal
http://www.miata.net/garage/tsb/sb006_93.html


I've had this one in the past - Squeal noise from clutch release bearing. Such a simple trivial fix that drove me crazy until I read this
http://www.miata.net/garage/tsb/s003_95.html

EvoRoadster
01-03-2010, 03:43 PM
Dee, what Bill said is true. If the squeel is with the clutch pedal depressed or out it is most likely NOT a throwout bearing. The throwout bearing is only engaged when you depress the clutch pedal and it is disconnected when the pedal is not depressed. If it is coming from the clutch assembly then it is most likely a pilot bearing. It should of been changed during the clutch job but might not of been. If you still have them, check your receipts since a pilot bearing would have to have been bought on a seperate line.

http://auto.howstuffworks.com/clutch2.htm

Dee
01-07-2010, 05:01 PM
My husband changed the alternator belt, which even though it looked brand new, was a little bit loose. Have put at least 150 miles on it since then and no noise yet. Hurray! If it comes back I'll report again. Thanks for all your help.