Miata Mailing List: February 1996, Message #141
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   From: dherr@extro.ucc.su.OZ.AU (Dennis J. HeRR)
Subject: Tapping on very hot day
   Date: Sat, 3 Feb 1996 00:49:09 -0500

G'day!

Yesterday was very hot - when I said hot I mean around 34plus Celcius :) -
and I was on street almost all day.  About after lunch time, I started to
hear this tapping noise from the engine while I was standing still at the
signal.  It won't disappear until 45000rpm - or in third gear.  It remained
rest of the day but on my last driving at around midnight, somehow this
noise had disappeared.  I'm using Mobile 1 since 29,000km - I'm currently
near 40,000km - and there's only one grade available in Sydney.  I think
it's 5W-50. (I'm not so sure about this though.)  Is this something I
should worry about?  I usually hear this tapping noise when I start up the
engine after hard driving but this time it suddenly appeared while I was
driving - ok, I was standing still waiting for the signal. :)  Do I need
oil cooler?  I drive Momo chan pretty hard - shift at around 6000rpm
whenever possible and most of time keep the rev at 4800rpm or more for all
day on very hot wheather.

 Dennis (^_^;

          '89 BMW 525i - White, only when I need it.
  /\_/\   '89 RX-7     - Red,   too many tickets to keep it.
 ( - - )  '92 MX-5     - Red,   too much fun to worry 'bout tickets.
 ==_Y_==  Dennis J. HeRR (dherr@extro.ucc.su.OZ.AU)
   `-'    Momo chan '92 red w/ low profile headlight
   Neko   Member of MX-5 Club of NSW #309
          Member of Miata Club of America #53709