What temp for #2 to gel? - Dodge Cummins Diesel Forum
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post #1 of 29 (permalink) Old 12-05-2008, 03:03 AM Thread Starter
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What temp for #2 to gel?

Hey guys, what temp does #2 fuel start to gel at? Thanks!

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post #2 of 29 (permalink) Old 12-05-2008, 09:46 AM
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Hey guys, what temp does #2 fuel start to gel at? Thanks!
Level 1 - "Cold Filter Plug Point"
This is the point at which there is enough solid waxes bound togather in the diesel to be caught by the filters. There not be enough for you to really "see" yet, but they are being trapped by the filter. If the fuel remains this temprature long enough and if enough fuel flows through the filter, it will become plugged, even though the fuel may look "clear".
As the fuel gets colder and colder, more of these waxes bond together to form bigger and bigger "polymer bonds" of waxes.

Level 2 - "Cloud point"
This is the point at which the fuel looks "Cloudy" to the "naked" eye. There is enough of these polymer bonded waxes to form large enough chains to be visible. It will abviously stop up filters here.

Level 3 - "Gel Point"
This is the point at which there are is an “infinite polymer network”. The point at which the fuel starts to be a solid or semi-solid due to these polymer bonds. The fuel will not flow at this point.

Cold filter plug point/Cloud point is anywhere from 20*F - 40*F depending on water and contaminates in your fuel.

Gel point is around +5* give or take a few degree.

Biodiesels are more prone to Cold filter plug point/cloud point/gel point. They can plug faster, they absorb water more redably. The Bio part can seperate out of suspension in ULSD more prone than LSD. Can not explain why just know it does.

Remember we have a fuel filter heater so we should be protected at temps lower than stated but I'am not going to venture into that for liability issues.

Last edited by pwr2tow; 12-05-2008 at 09:58 AM.
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post #3 of 29 (permalink) Old 12-05-2008, 11:52 AM Thread Starter
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right on! Thank you!
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post #4 of 29 (permalink) Old 12-05-2008, 11:56 AM
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nice post pwr2tow


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post #5 of 29 (permalink) Old 12-05-2008, 12:08 PM
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Thanks for the kind words.
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post #6 of 29 (permalink) Old 12-05-2008, 12:15 PM
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snackpack,

Your avatar cracks me up. What's happening to the dog and his expression is the way I feel most days.

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post #7 of 29 (permalink) Old 12-05-2008, 12:17 PM
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lol, thats me too, always someone tryin to screw ya, and about to unleash the inner beast


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post #8 of 29 (permalink) Old 12-05-2008, 12:18 PM
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post #9 of 29 (permalink) Old 12-05-2008, 05:34 PM
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so at what temp should i worry about 25%wvo-75%#2 ???

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post #10 of 29 (permalink) Old 12-05-2008, 07:25 PM
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Quote:
Originally Posted by buzzinhalfdoz View Post
so at what temp should i worry about 25%wvo-75%#2 ???
Sorry I can not answer that I'am not into home brew biodiesel but I will say alot has to do how you refined it into bio.

Worry as far as drop out of suspension or gelling, guess it don't matter as I can not answer.

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post #11 of 29 (permalink) Old 12-05-2008, 08:08 PM
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All depends on where you live, fuel has additives mixed in before delivered. Fuel bought in the south will gel before fuel bought in the north.

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post #12 of 29 (permalink) Old 12-08-2008, 12:46 AM
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Look up your local fuel suppliers specifications and it will be posted...

Here is one of my local suppliers...
http://www.cenexenergy.com/Downloads...erSpec2007.pdf

Pour Point >-45*F
Cloud Point -10*F
CFPP -30*F

Like I said look it up I'm sure you supplier has a data sheet on there products...

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