Re: Fuel pump dampers

[QSHIPQ@aol.com]

>While perusing the Bentley ('89-91 100/200), I noticed that the fuel pumps
>for  MC & NF engines and for 3B engines have devices atop the pump labelled
>"noise damper" and "silencer", respectively. Pretty descriptive names!

>Since this thread has centered on FP noise (meaning and implications
>thereof), I wonder if anyone can comment on the possibility that some FP
>noise might be caused by mal- or nonfunctioning noise suppression devices
>at the top of the pump? I don't know if it's possible for them (noise
>supressors) to be defective, but if so, perhaps these pieces are available

BTDT.  The part is listed on the fiche as follows:

447 906 095 "Pressure Damper" is listed on all 5k/200 cars with in tank
mounts 86>91 = 132.25
441 906 095 "Pressure Damper" is listed on all v8's in tank FP (and a later
vin split # with that too)

Changed a couple out with known "quiet" pump ones, and find that a) the 2
local chicago mega dealers shows 00 sales of these, lots of pumps, and b)
replacing the pump with the same damper quiets the noise immediately if the
cause has been traced.  Even with the TSB breakdown of tank material clogging
screen, no cleaning of the pressure damper necessary.  One of my audi
contacts indicated that the only reason he could think of to replace that
"dumb thing" is if you lost it.  

HTH

Scott