If it's loud enough, it could be cavitation because of a restricted flow
(clogged filter of blockage). I've got a similar problem with mine that I've
been putting off diagnosing. I'll use a gas can to by-pass the tank to see
if I've still got a blockage. The Ford Bronco/F150 pumps are slightly
cheaper than the cheapest ones specifically designed for the Vanagon. I'm
still trying to see if the PSI and GPH are similar. See Greg Potts' post
today that addresses that issue.

Ed in CT
----- Original Message -----
From: "Woody Halsey" <WHalsey@SYA.ORG>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, October 18, 2006 9:20 AM
Subject: fuel pump noises

Dear List,

Should I be concerned or reassured that my fuel pump is distinctly
audible as it hums (actually, it's not a real him, more of a small,
rapid clattering sound - I cannot find appropriate words) along
constantly?

If it is the former ("concerned"),  and the old one is on its way out,
I'll buy a new one now!

Thanks,

Woody

83.5 V'gon

Haverhill, MA