OK, I have a question that I couldn't find an answer to on this forum, though maybe it is out there somewhere. I just converted my 84 300 SD to run on vegetable oil and I went the kit route. I am still working on the oil sources, but the car conversion is done. One thing that doesn't make sense to me, though, is the fact that I replaced the hollow banjo bolt that seems to connect 3 lines and the fuel filter ( a 4-way intersection) with a solid bolt that seems to isolate all 4 so that there is no connection a all between them. My buddy with an '84 300 D had run his car on WVO without the banjo bolt replaced and he almost overran his WVO tank with backfilled diesel. Upon replacing his banjo bolt with the solid bolt he ran fine and the backfilling stopped.

So, at the moment I am running from my diesel tank but with the banjo bolt replaced with the solid bolt. I am all ready for filtered WVO. My question is: what was the purpose of the hollow banjo bolt, since I seem to be running fine without it?

Thanks.