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Water in Diesel

S

Steve@Advance

Well-known Member
One of our company trucks, 08 F250 6.0, keeps turning on the water in fuel light. Happens about every 3 months or so, have to get under and pull the drain plug on the separator, nasty job, probably only get a teaspoon of water out of it.

I've heard bad reports of using water demulsifier in diesel, defeats the purpose of the separator and sends water through the engine.

There seems to be a very minor amount of water in the tank as the separator only takes a small amount to set the light.

Should I drop the tank and clean it out or add some Seafoam or Diesel 911 or ???
 
we had a heck of a time this winter with diesel fuel in our wrecker fleet. lot of water in the fuel from many different suppliers. we run power service at every fill up. the latest adventure was our 7.3 powerstroke in the wrecker. after throwing gobs of money at it to get it back on the road, it got water in the fuel and took the injectors out. would have been cheaper this year to run a big gasser.
 
The light on my service truck ('95 Freightliner) didn't come on for nearly 12 years.....Didn't even know it had one until it came on the first time...... Now, in the past 2 years, with the 'new fuel' (ie -ULSD and biodiesel blends) it stays on more often than it stays off, or so it seems.
 
I would rather have the water separator do it's job than to put an additive in the tank that allows the fuel to mix with the water and sent through the fuel injection. What I would want to do with the truck is make sure that the fuel system on the truck is sealed. Vent lines, filler neck, fuel pump mounting o-ring etc.

Not sure about your truck but I will mention that in the past I have had a couple flat bed trucks getting water in the fuel tank coming from the filler neck. Both trucks had the OEM filler necks modified to fit the flat bed. One truck had the rubber filler neck hose loose and fixed with a hose clamp. The other truck had a metal pipe spacer on the filler neck that rotted out. On wet roads the tires picking up and slinging water makes the problem worse, especially considering winter time road salt, dirt and sand.
 
sounds to me that if they were smart enough to invent a separator, that they should be smart enough to have it expel the water so it could keep doing it's job. my .02 cents
 
Emulsifiers spread liquids out in other liquids that they normally wouldn't. Demulsifiers seperate two or more liquids. Check the label on the back but as far as I know, Standadyne fuel addative is the only one on the market that is a demulsifier. Any other addative is just making it harder for any fuel/water seperator to do it's job.
 
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