I thought of that too, but the odds of a new pollack failing are pretty low. And even if it is partially open, that would mean that it would be pulling a mix of diesel and VO, right? So, that's unlikely a source of the airleak.

My money is on a loose hose.

After all I read about the Pollack valve failing at a young age, I plan on going with two 3 way valves.

A partially open valve can let you pull air in through the return if the fuel level is below 1/4 on the factory tank. I have no idea what the return set up is on the WVO tank. I've seen some tanks return drop it at the top with the filler neck.

Also, was the HOH line checked for leaks? An erant kink can crack it and also look for sharp object along it's path.

With all the potential problems, I have not made the WVO jump yet. I have run WVO/Kero/dino blends fine though, but only during the spring and summer. I would like to do a two tank set up, and I plan on using metal lines under the car and rubber for connection points.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

My pump is a facet . It`s not the same as the one they sell at frybrid but it works good i`ve been using it for 3 yrs no problems.It is a little square shaped pump gold color. The black one should work fine too. you should be able to get either one at Shuck`s or Kraegen. I also put a little glass filter just after to pump so you can see whats happening . Take the filter out and just use the glass. My pump is wired to the vegi side of the toggle switch so it`s on when the valve is switched to vegi. If you want to keep the looped return line because you don`t want to lose any heat you could add a flat plate heat exchanger and get plenty of heat. I get over 160 in 20 degree weather . i had to add a switch so i could shut off the vegi therm or it will get to hot depending on outside temp. hope this helps Rick

Finally got it running on veg oil! The solution? Disconnecting veg lines one at a time to bleed air, first through lines from veg tank, then after the vormax heater/filter, then after the pollack, finally after the LP. This way I would know that each component was bled and checked out. I must have drawn at least 10 litres of veg oil through the process. I can't say why I had so much trouble earlier, except that maybe disconnecting the looped return and letting it run into a jar was causing me more problems than it was helping. And maybe the hand vacuum pump was able to draw vegoil to bleed the air better than my (old version) primer pump.

After bleeding through the LP I just connected the lines, started on diesel and after engine was fully warm switched to vegoil. Engine didn't even hiccup, and it ran for 10-15 minutes on vegoil. Now that I've finally got the system working, it's time to retire my rusted out 92 Saturn and start driving in style, and with a cleaner conscience (the Saturn was a real oil-burner!)

I still may need to add an electric pump at the veg tank. It's still well below freezing in Southern Ontario and once I start parking the car outside (it's been in a heated garage through the whole conversion process) I may have trouble with my stock LP pulling the thicker WVO. A local supplier can get me a 10-14 PSI pump for $90 CDN. Seems a bit pricy. And 10-14 PSI seems overkill. Any thoughts?

On another note, anyone ever replace an inner CV boot with a split boot to avoid removing the rear axle? If so, where can you get a split boot?

Congrats. My wife and I had a bottle of bubbly chilling just for that moment. I hope you had a proper celebration!

Just to be clear, before you shut off the car you did run the purge mode to push diesel back up the veg side? Right?

14 psi seems way too high. The little bit of research I've done says you don't want it to be any stronger than the stock pump. Do some research before you buy anything. For what it's worth, I've been operating in single digit temps (F) fine with just the stock pump.

I wouldnt get rid of the saturn just yet. You might find yourself needing it occassionaly as you continue to test/tune the veg setup.

Cheers!
Marc

Quite right Marc, I'll keep the Saturn just in case! I did purge the diesel through the veg side on shut down. Thanks for the help, and now for the bubbly...

Don