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  • vehicle suitability

    has anyone used commercial biodiesel in a 1991 Toyota Troop Carrier with 1HZ O/H cam engine and with what results?
    Robert
    Administrator
    Last edited by Robert; 10 October 2005, 12:11 PM. Reason: Added vehicle type to post heading

  • #2
    Re: vehicle suitability

    I have a 1993 Land Cruiser 80 series with a 1HZ engine with 300,000km on it. In 2000, after a trip to Queensland I bought some Qld distributed Mobil diesel, which unknown to me had just changed specifications to Low-Sulphur Diesel. Something in this fuel caused the seals in the Injector Pump to fail (210,000km) and fuel was being pumped into the lubricating oil, diluting it. Mobil were very nice about it as this fuel had only just been released and after providing dockets to prove I had used Mobil continuously on the trip, they paid $800 for a pump rebuild using new synthetic seals and gaskets. The pump is now fine to use with old-mix diesel, Low-Sulphur diesel (which has had it's composition changed slightly) and (according to European websites) Biodiesel. At this stage I have only made one batch of Biodiesel which was mixed in with fuel in the tank, so can't say much except the pump hasn't failed on me yet!
    How many K's on your engine? Have you rebuilt your injector pump since 1997 (when Toyota introduced synthetic seals in the replacement parts)? I had my pump rebuilt by www.berrimadiesel.com.au (02)4877 1256 and they seemed up to date on problems caused by Low-Sulphur fuel.
    Mazda's Secret Service motto: "Tell 'em nothing, charge 'em double".

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    • #3
      Re: vehicle suitability

      (Please don't hold me to this as I am no means an expert, I'm just re-telling what I've heard. I am no expert either on Low Sulfur Diesel or Biodiesel.)

      I believe that the LSD (the fuel, not the drug), can shrink the rubber components (seals) causing the problems that Gunner mentions. It is also true that synthetic components are not affected by LSD, or biodiesel.

      I understand that biodiesel has the reverse effect on rubber components, making them swell, where the LSD makes them shrink. I have heard that in some cases old leaky pumps are brought back to life when biodiesel swells up the seals and stops them from leaking. (Gunner, you may have only needed a tankful of biodiesel to restore your seals after the LSD)

      However, it is also true that this can have a negative effect if your rubber fuel lines swell up and go weak.

      The answer is: You are going to have to change your fuel components to synthetic anyway to run LSD. So it is also a good idea to do this to run biodiesel.

      If anyone has more information, or would like to correct me on this, please do so, I like to learn and if it is posted up here, then we all learn.
      Robert.
      Site Admin.

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      • #4
        Re: vehicle suitability

        I need confirmation on fuel pumps for Mercedes 240D. The swelling rubber seals sounds promising but I don't want an immediate $800.00 rebuild on a car bought for $2500.00. If there is any question mark over my pump should I run it on B20 or convert to SVO?

        Cheers

        Phil

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        • #5
          Re: vehicle suitability

          You are going to have do some checking. Try Berrima Diesel, or any other reputable Diesel specialist for an answer. Try contacting Mercedes Australia, but I suspect they will outright tell you not to risk Biodiesel in your vehicle. And finally, try some European websites. Europe has had Low Sulphur Diesel for longer than us and use of Biodiesel is more widespread, so you might find that your pump is already fitted with synthetic seals. Some modern Euro diesel manufacturers actually recommend using Biodiesel in favour of PetroDiesel! What year is your Merc?
          Mazda's Secret Service motto: "Tell 'em nothing, charge 'em double".

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