Miata Mailing List: February 1993, Message #8
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   From: (none)
Subject: Another valve adjuster question
   Date: (none)


I have a '91 Miata, and do not have any problems with noises when the
engine is cold.
However, after taking a few funs runs (at the local autocross) in a row,
with the engine running very hard, then the engine noises begin,
I also went the Miata driver's school (I recommend it to everyone if
it is still around), and while racing around the track, the noise also
appeared.

At first I thought it was just engine knock, and then after all of the
stories about the hydraulic valve adjusters, I have begun to think that
it what it was, (valve noise not knock).  Now I am not so sure
anymore.

Is the noise problem limited to cold engine starting, or is it possible
that I too should get the valve adjusters replaced.  Can anyone tell me
that the problem is definitely not the valve adjusters.

Thanks 

Tom Tkacik
CS Miata #67
GM Research
tkacik@hobbes.cs.gmr.com