The problem is that the pulley can move slightly, which bashes back
and forth on the key. This gradually damages the slot in the
crankshaft. Check miata.net for more information. Here's one article:
http://www.miata.net/garage/crankshaft.html
My 1990 Miata has around 150K on it, with no crank problems so
far. As for the timing belt being one tooth off, in my experience
this makes a car run worse than you are describing. As for the EGR
valve, it is my understanding that early Miatas (with the 1.6 engine)
do not have one.
The people on this list are, of course, all brilliant :-) but for
Miata specific info I would look to miata.net and the miata mailing
list, including the extensive archives:
http://list.realbig.com/pipermail/miata/
-Steve Trovato
strovato@optonline.net
At 05:19 PM 6/1/2009, scott.hall@comcast.net wrote:
>so this bolt does what? it trashes the crank? I thought we'd r&r the
>plug wires, o2 sensor and erg valve first, then worry about more
>expensive things.
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