Quote:
Originally Posted by probear
Well, from what I can tell, 4219G is not the proper hose for your car. It is made of nitrile which will break down from Biodiesel's solvent properties. 4219G is normally used for Oil, gasoline and gasohol, but not for Bio-diesel. You need to get hoses that are made from Viton. Nitrile hoses were typically used prior to 1993, and will eventually break down from Bio-Diesel. Nowhere can I find 4219G recommended for diesel applications.
The fuel filter could have the same problem. If it was originally a gasoline filter, BioDiesel could easily destroy it.
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Good point - but he didn't implicitly say he used that new hose stamped with 4219G on his car - merely used as a comparison in the photo.
I'm sure though, that the prefilter is for diesel.....but it's very interesting how it melted/deformed like that.