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Re: [GMCnet] Fuel filters [message #132985 is a reply to message #132976] Fri, 01 July 2011 12:17 Go to previous messageGo to previous message
emerystora is currently offline  emerystora   United States
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Registered: January 2004
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> Richard Brown wrote on Fri, 01 July 2011 01:49
>> I was talking to a friend today on the phone & he told me something that piqued my interest. He works as a mechanic on gasoline & diesel fleet vehicles and lately a lot of the companies are installing large fuel filter/water separators that use a spin-on filter that looks similar to an oil filter in size, but are designed to filter gas down to 2 microns and separate water from the fuel on vehicles using E-10 fuel. The ones they are installing are made by Wix, so the filters should be fairly easy to find & can hold almost a quart of water before needing to be replaced. I would assume it would need a fuel pump ahead of the filter to be useful. He's getting the info for the bases and filters and will get back to me at a later time. My question for the brain trust is would such a filter be useful for GMCs or would something like this be either overkill or simply not work in our application?He said that some of the filters are drainable to remove collected
>> water, but they have been simply replacing the filters at regular intervals. I can imagine a filter of that size could hold a considerable amount of trash before becoming restricted. I'm also wondering where the best place would be to install one. Anyone think this would be a good/bad idea & why.
>>
>> Richard & Carol Brown
>>
>> 1974 Eleganza SE
>


There really isn't much need for a filter that takes out water. Years ago people used to add Drigas (usually isopropanol) but nowadays with 10% or more ethanol in the gasoline there is no need for Drigas as the ethanol will absorb water that might get into gasoline tanks.

The main source for water used to be the condensation in the service station fuel tanks and perhaps a little bit from condensation in the vehicle fuel tanks.

I am surprised about the reference to water in E-10 fuels. With 10% ethanol that fuel should be able to absorb about 3 tablespoons or more water per gallon. So, a 50 gallon tank could absorb about 2-1/2 quarts of water and pass it through to the engine without it wetting out the spark plugs.

Emery Stora
77 Kingsley
Santa Fe, NM


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