Re: [DML] Noisy fuel pump (still!) (and again!)

["DMC Joe" <dmcjoe@xxxx>]

Martin,

Thanks for your explanation. The reason I mentioned this is because I
recently had a customer complaining about excessive pump noise and noticed
that he had a spring inserted in the fuel pick up hose. I replaced the hose
with a new unit and the noise went away. Of course there is always the
possibility the pump was incorrectly installed and the proper reinstallation
may
have taken care of the problem.

Regards,
DMC Joe/Help Club dmchelp@xxxx
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----- Original Message -----
From: "Martin Gutkowski" <webmaster@xxxx>
To: <dmcnews@xxxxxxxxxxxxxxx>
Sent: Friday, March 29, 2002 6:34 PM
Subject: Re: [DML] Noisy fuel pump (still!) (and again!)


> A suction hose can never operate at higher than atmospheric pressure - ie
vacuum is not a
> force in its own right, it is merely a lower pressure than the outside. In
this case,
> atmospheric pressure.You are unlikely to create vacuum bubbles at this
level of suction
> and even if you did, they'd disappear the moment they pass through the
pump.
>
> Martin
> #1458
>
> DMC Joe wrote:
>
> > Fuel under high pressure may be cavitating as it passes
> > the spring coils the resulting bubbles will increase pump noise.