[Vwdiesel] biodiesel requiring a rebuilt injection pump on an '84 Rabbit

paul lew biovolks at yahoo.com
Wed Mar 22 11:20:42 EST 2006

I was thinking...
  The european volkswagon diesels have the proper hoses, would that mean all other rubber in the line of fuel would be too?
  It's the methanol in biodiesel that is the rubbers enemy. 
  I never did find out how much more harmeful the low concentrations of methanol in bio diesel are compared to dinodiesel which also apparently is harmful to rubber.
  If you want to get rid of the methanol in it, heat it to the vapour rate (temp?)of methanol. 
  Apparently if you let it sit long enough (time ?) it will evaporate , I would assume you stir it once in a while for both.
  I didn't do this the last time I was in production , but now that I have the extra space I will.

82 Diesel Westy <dieselwesty at yahoo.com> wrote:
  Well said David, 
"This stuff won't be immediate, though your belt may
not have much more time after the pump starts leaking.
You will know the pump leaks when you get puddles of
diesel on the floor! :-)

If you plan on using high concentrations of
I would start budgeting some money to have the newer
seals installed in the pump. Then you won't have
anything to worry about.

> Keep your noise under the hood and sniff for raw
diesel as well once every few days.
If you plan to make it a WVO or Bio blend car, change
those pump seals now before you start running higher

Now, where to go to have the pump re-sealed with
proper sealant. David, who did your pump?

Good luck and thanks for the new link, did not know
about frybrid.com :=)


Bryan Belman, Pt Pleasant, NJ
04 Jetta Wagon TDI PD, 100hp, 5sp
Rebuilding 82 Diesel Weekender from my old rusty 82 Westy 1.9NA
90 Audi 200, 2.2L Turbo FWD
70 Type 1 stock Beetle
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