[DeTomaso] Techno question: a fine mess
Asa Jay Laughton
asajay at asajay.com
Wed Oct 7 23:19:48 EDT 2015
I'm not an expert.
Mine still does that.
I figure it's a bad diode or rectifier bridge in the alternator
(depending on model and year of alternator). Even electronic components
sitting on a shelf can eventually go bad. Swap the alternator out, have
it tested and replace if necessary.
FWIW, I think your noise might be in the water pump too. Run the engine
with the belts removed, you can do that for a minute or two without
worry. See if the noise goes away. If it does, then it's something the
belt drives. If it doesn't, then you might have an engine going in for
surgery.
Asa Jay
Asa Jay Laughton - W7TSC, MSgt, USAFR, Retired
& Shelley Marie
Spokane, WA
******************************
http://www.racingagainstautism.com
http://www.teampanteraracing.com
http://facebook.com/racingagainstautism
On 10/7/2015 3:41 PM, Charles Engles wrote:
> Dear Forum,
>
>
>
> Thanks for all the tips and options. I will
> digest them and attack the problem on Friday evening.
>
>
> Is there a plausible explanation for the
> ammeter's bad behavior with the replacement stock alternator??
> ........or is it just some peculiarity of the replacement alternator??
>
>
> Warmest regards, Chuck Engles (less
> flummoxed)
>
>
>
>
>
> From: MikeLDrew at aol.com [mailto:MikeLDrew at aol.com]
> Sent: Wednesday, October 07, 2015 1:06 PM
> To: cengles at cox.net
> Cc: detomaso at poca.com
> Subject: Re: [DeTomaso] Techno question: a fine mess
>
>
> In a message dated 10/7/15 6 01 58, [1]hoppe1 at cox.net writes:
>
> > 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.
>
> >>>Right. You'd be amazed at how noisy a perfectly good-looking belt
> can be.
> Belts are cheap and consumable; those living in an enclosed engine bay
> like the Pantera's don't benefit from airflow as they do in a
> front-engined car, so probably have a shorter effective lifespan. You
> rarely get access to the front of the engine, so now is probably a good
> time to change them anyway.
> The idler pulley bearing can make one hell of a racket. You can buy a
> replacement bearing, then press (or have a machine shop press) the old
> bearing out and the new bearing in. But the bearing is expensive, and
> labor adds further to the cost.
> Your local NAPA auto parts store has a replacement pulley with bearing,
> ready to bolt on, that costs less than the cost of just a replacement
> bearing for your old pulley. It is slightly larger in outside
> diameter, but otherwise functions identically and allows the use of the
> same-size belt.
> Part number is Duralast 231036. Cost is about $13-15 if memory serves,
> while just a replacement bearing for your old pulley is more like $25,
> and you haven't started paying machine shop costs.
> Changing the belts first will determine if you need the pulley. If you
> don't, just return it. And if you do, have it in your hands and
> install that next.
> There, you fixed it. :>)
> Mike
>
> References
>
> 1. mailto:hoppe1 at cox.net
>
>
>
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