I never understood the bolt theory,thats why I looped my fuel back to system,for one it keeps hot fuel at the motor,two if you send hot fuel back to the veggie tank,it will cause trouble with water.I never had problems with air because I added a electric pump.It bleeds air in seconds.Diesel has dropped here in U.S. to $2.50 a gallon.WVO is so hard to get,I just keep 150 gals. of used clean,motor oil,for emergency fuel.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt