Water Pump Rookie

[AlfaNeely@domain.elided]

       The Alfa mechanical tach is not driven by the fan belt.  It is driven 
by a worm gear on the front of the intermediate gear on the front timing 
chain.  The lower chain connects the crankshaft to the intermediate gear, so 
it turns at crankshaft speed.
       If your tack read zero with a broken fan belt, something else was 
going on.

       I think (opinion) that the later electronic tach is driven by the 
sensor on the flywheel.  That is the same sensor that triggers the electronic 
fuel injection.

Ciao,
Russ Neely
Oklahoma City


In a message dated 09/30/2002 7:37:55 AM Central Daylight Time, 
owner-alfa-digest@domain.elided writes:


> Date: Sun, 29 Sep 2002 19:45:42 -0400
> From: "Paul Novak" <spammit@domain.elided>
> Subject: RE: Water Pump Rookie
> 
> Tony,
> 
> Until the water pump went on my spider this summer, I thought that water
> pump failure was *always* preceded by leakage through the weep hole.
> 
> It made a nasty grinding sound that I thought was coming from the alternator
> bearings.  I even ordered replacement bearings for the alternator since it
> was working fine otherwise.  Before the replacement bearings came in, the
> pump suddenly failed while I was driving in traffic on the highway.  It just
> seized up completely.  The fan belt made a nasty stink and broke.  As I was
> thinking 'I sure hope that smell is not from my car...' I noticed that the
> tach now read zero (driven off the water pump) and the temp gauge shot up.
> Needless to say, I pulled over ASAP.

<snip>

> Regards,
> 
> Paul.
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