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Old 07-25-2010, 09:59 PM   #1
New Member
Join Date: Jul 2010
Posts: 1
Year: 58
Coachwork: GMC PD 4104
Engine: 6-71 Detroit Diesel Engin
converting a diesel engine to run on veggie oil?

Our names are Ricky and Teresa Pike. We have a 1958 GMC PD 4104 Bus with a 6-71 detroit diesel engine...We are wanting to know if that kind of engine can be converted to a motor that runs on veggie oil?

Please feel free to email us back with a little details if it can be done. If it can, we are going to remodel the whole inside of the bus and travel the world....

Our personal email is
you may email there as well...

Hope to hear from you soon,
Ricky and Teresa Pike
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Old 07-30-2010, 11:23 AM   #2
Locutus's Avatar
Join Date: Jan 2010
Posts: 227
Year: 1990
Coachwork: Crown
Chassis: Super Coach II, 36 Ft. RE
Engine: Cat 3208T, MT643
Re: converting a diesel engine to run on veggie oil?

Try contacting the folks at They build advanced conversion kits and should be able to address the compatibility of your engine.
(Latin) loquor loqui locutus dep. [to speak (in conversation); to tell , say, declare, talk of].

Children drink kOOlaid, adults drink T.E.A.

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Old 07-30-2010, 08:55 PM   #3
Bus Nut
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Join Date: May 2007
Location: Whidbey Island, WA.
Posts: 978
Year: 1984
Coachwork: Blue Bird
Chassis: All American
Engine: 3208 na boat anchor
Rated Cap: 2
Re: converting a diesel engine to run on veggie oil?

What's the exchange price of an old style unit injector now? Back when I ran '71's they were reasonable. That alternative fuel will probably waste 'em, but if cheap you could keep replacing them until you figure things out. Don't run them until the nozzle breaks off--that will cost.

Best to do on a non-turbo'd engine. You don't want to keep replacing that thing.
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Old 08-27-2010, 10:01 AM   #4
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Join Date: Dec 2003
Location: Summit, Oregon
Posts: 121
Year: 1975
Coachwork: Crown
Chassis: Supercoach
Engine: DD 6-71N
Re: converting a diesel engine to run on veggie oil?

Hi Ricky and Teresa,
Yes 6-71's run great on WVO. I've been doing it for about 2500 miles.
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