biodiesel in 86 6.2??

[Mr. Bone]

Hello,

Has anyone ran biodiesel in older 6.2L? I am wondering how it will effect the rubber lines? If so, is there a suggestion on type of lines to use that are biodiesel safe? Thanks.

[83Blzr62]

I have been running biodiesel for about 2 years. I have some of the original fuel lines and they have been fine. I replaced my return lines with viton from Mcmastercarr. Your lines should be fine for a while but theoreticaly you should replace all your fuel lines with viton or someother biodiesel resistant line. I only know of viton, but it is expensive. Also if your injection pump is old or original you should probably get it rebuilt to be sure it has the newer viton seals in it. Accurate diesel will do it cheaply and I have a great pump from them. Call them and they can get you just the pump you need.

http://www.mcmaster.com/ Search for viton
http://www.accuratediesel.com/

[Mr. Bone]

Wow - great! Thanks for the informative reply. What a great help. Best to you.

[DLang]

is it reasonable to assume that a recently rebuilt injector pump has biodiesel safe seals in it? or are these something you have to specificly ask (and pay) for?

[armadillo1]

I recently installed a rebuilt injector pump. While returning my old pump to the shop for core, I asked the guys at the shop the same question. They told me Vegetable Oil or Biodiesel should not bother the pump at all, assuming all warm-up and purge procedures are followed. They did mention that any pump that has been running a particular type of oil for a long period of time may not stay completely leak-free if an oil of different chemical makeup is suddenly introduced. That is just the nature of rubber seals, and applies to any pump. So, to answer the question, your pump should be ok.

[arveetek]

I've been running home-brewed biodiesel for a year now in both of my diesels. The '81 has nearly new stock fuel hoses, and the '95 has factory stock hoses, and I haven't seen any problems yet on either vehicle. Keeping my fingers crossed!

Our home-brewed diesel is washed and dryed after the glycerin has been removed, and I think that lends to being easier on the fuel hoses.

Casey

[john8662]

Mainly the methanol is the part that eats the lines, used in breaking down the fuel to separate the glycerine.

I ain't made no biofuel though, this is my understanding.

[DmaxMaverick]

Mainly the methanol is the part that eats the lines, used in breaking down the fuel to separate the glycerine.

I ain't made no biofuel though, this is my understanding.

There should be no methanol in your end product. It is either vapored off, or condensed for reuse. The process you use to dry the fuel will have the methanol long gone by the time you finish the product. Methanol in stored fuel is a big no-no. Methanol absorbs water very easily from the atmosphere. Same with lye.

[GOEHILL]

I had an engine made with a 6.5 block and new 6.2 heads N/A. it has a 6.5 N/A injector pump. how do I know if it has small pre combustion chambers, I only get 18mpg with it . it has a 700r4 with 3.42 gears ,for 1800 rpm what mph should drive in to get optimum MPH

[HH]

Anything with rubber may need replacing faster than normal, return lines, fuel lines, and rubber diaphrams such as a mechanical lift pump.