[Vwdiesel] Tdi Pump Seepage w/ Biodiesel?

[Edward Lowe]

Greetings from Seattle!

Our 97 Passat Tdi has developed a seep at the pump.  It appears to be from a Cap sort of thing on the very top of the pump.  We have been running B99 for a couple of years now and have had the return lines seep and the end cap (of the fuel return) dissolve.  We replaced these with Viton and have had no other problems till now.  I had thought the Tdi's were Biodiesel proof.  Maybe not.  What is to be done? Where can I have this fixed?
(The dealer will say "you need a new pump")

Ed Lowe