[DeTomaso] Techno question: a fine mess

[thomas]

Water pump?

> 7 okt. 2015 kl. 03:15 skrev Charles Engles <cengles at cox.net>:
> 
>   Dear Forum,
> 
> 
> 
>                The predicament: a funny howling, squealing noise from the
>   front of the engine.  I inspect things and cannot localize it, but it
>   appears that it is not the AC idler pulley or bearing.  The belts look
>   good.  A temperature gun shows that the alternator axle (?) was 35 or
>   50 degrees hotter than anything else on the front of the engine
>   pulleys.   I decided that the noise may be coming from the alternator
>   bearing.
> 
>   Loosening and tightening the idler pulley didn't change anything.
> 
> 
>                I pulled off the old stock alternator.   I pulled out
>   another stock alternator from the parts supply that was working well
>   when removed in 1998.   The suspect alternator had a tiny bit of
>   roughness and a subtle noise when I spun it on the bench with my
>   fingers.  The "new" old alternator did not.   I thought that I had
>   found the problem.
> 
> 
>                I installed the back up stock alternator.   I tested the
>   engine at idle and I am crushed that the noise is still there.
>   So....the noise is from one of the belts or from the idler pulley.
> 
> 
> 
>                Plus a new problem: the ammeter is bouncing back and forth
>   like a metronome with a seizure.   This really confuses me because
>   after I placed the ammeter shunt decades ago the bounce has been gone.
>   Now, the only thing that is changed is the alternator that is from
>   Pantera 7191 and place on Pantera 7171, which should be the same
>   alternator.
> 
> 
> 
>               So the search for the squeal goes on.   The electrical
>   mystery of the Return of the Curse of the Bouncing Ammeter has me
>   baffled.
> 
> 
>               I can accept the continuing task of the squeal search, but
>   I do not understand my electrical problem.  Can anyone explain this to
>   an electrically challenged Pantera technician??
> 
> 
> 
>                                 Flummoxed,  Chuck Engles
> 
> 
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