Date:         Sat, 1 Nov 2008 12:21:32 -0400
Reply-To:     Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject:      Re: Fuel pump replacment frequency?
Comments: To: Don Hanson <dhanson@GORGE.NET>
In-Reply-To:  <000901c93c2d$c4b8a580$4001a8c0@gateway.2wire.net>
Content-Type: text/plain; charset="US-ASCII"

At 254k miles FUN BUS still has the original pump. However, since you ran it
dry it is most likely damaged. The is usually the end for these pumps. Any
dirt that gets into them will also damage them.

The pump design is known as a roller cell. Any dirt or when run dry the
rollers will slide instead of roll and scratch the outer race. Thus the
noises begin. Also, the fuel actually flows over the motor windings and
brushes. Get the right combination of air and fumes into them and they can
ignite.

The 84 only had the plastic filter before the pump. There is also a screen
in the tank. *^ and later removed the pre filter and used a much better can
filter after the pump to protect the injectors. A clogged tank screen will
also cause pump noises.

Dennis


-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Don Hanson
Sent: Saturday, November 01, 2008 10:26 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Fuel pump replacment frequency?

'84 vanagon
Should a Bosche FP last more than little over a year?  Mine was replaced
last summer, along with the fuel filter, but now I notice I can hear it
whining when before, that was only with a very low tank.  It sounds like it
may be on it's way out, again.  Or could the filter just be dirty again?  I
did run the Van right out of fuel recently, testing where my actual "empty"
is on my whimsical fuel gauge.  Perhaps some sludge from the tank's dregs
got into the filter or the pump.
  I'm about due to replace the filter anyhow, but should I order an new pump
at the same time?  Is it feasible to put some compressed air backwards
through the pump and clean it out some?  Is there a second filter anywhere?
  Thanks
  Don Hanson