Water or Emulsified Water/Fuel in Filter Can

[gmcjetpilot]

Replaced fuel filter as I have done many times. After I get filter out I look and expect to see clear fuel. It was cloudy. Never seen this before. I sucked the fuel out, installed new filter, ran pump with VCDS, started right up up. Replaced filter 5 or 6 times over many years and miles. Every time fuel was clear. Not this time.

Anyone ever see this? I assume this is water. Should I be worried. Should I drain or sample tank? Shoukd I pull top off filter housing and re-check?

I get my fuel at Murphy (Walmart). They do a lot of diesel sales.

 

[ZippyNH]

Sounds like the filter did its job
Truckers often have a Valve on the bottom of a clear filter holder and drain it weekly to remove water and visually check the filter. Reality is you can have a filter last 1000 miles or 100,000 on sheer luck....
Diesel does hold moisture based on temps, so with a big Temp swing, water can settle out even from a good supplier
It's simply the nature of the beast. Same for waxes, etc that are found on filters in the winter...more often before ulsd

 

[gmcjetpilot]

In

Sounds like the filter did its job
Truckers often have a Valve on the bottom of a clear filter holder and drain it weekly to remove water and visually check the filter. Reality is you can have a filter last 1000 miles or 100,000 on sheer luck....
Diesel does hold moisture based on temps, so with a big Temp swing, water can settle out even from a good supplier
It's simply the nature of the beast. Same for waxes, etc that are found on filters in the winter...more often before ulsd

Thanks for reply. To satisfy my curiosity. I'm going to try and sample fuel from tank, may and may open filter can up again, take a look see. May be I won't. Ha ha.

In my research some water 20ppm in diesel is beneficial. Un fortunately I extracted the fuel out with my oil extraction machine. I would have liked to have seen if water settled and gauge water volume for neird science fun. Guess I have been lucky with little to no water in fuel up to now.

 

[ZippyNH]

Additives can sometimes help...Power Service-winter version, the white bottle, has an emulsifier in it to prevent slugs of water from going thru your fuel system, possibly causing damage due to lack of lube (I would assume bigger temperature swings and less ability to hold moisture in cold temps can cause more risks of this vs summer when it typically just slowly gets passed thru as "dry" fuel absorbs a bit of moisture).
Generally if the filter doesn't have a dark black scum on it, just dirty looking, you are usually fine. Fuel systems that have moisture in them can get algae and bacteria growth issues too....there are chemicals for that that typically will kill it and remove it, causing you to need to change filter SEVERAL times for the first couple tanks of fuel. Typically it's only used if a problem is severe and causing issues.

 

[gmcjetpilot]

Additives can sometimes help...Power Service-winter version, the white bottle, has an emulsifier in it to prevent slugs of water from going thru your fuel system, possibly causing damage due to lack of lube (I would assume bigger temperature swings and less ability to hold moisture in cold temps can cause more risks of this vs summer when it typically just slowly gets passed thru as "dry" fuel absorbs a bit of moisture).
Generally if the filter doesn't have a dark black scum on it, just dirty looking, you are usually fine. Fuel systems that have moisture in them can get algae and bacteria growth issues too....there are chemicals for that that typically will kill it and remove it, causing you to need to change filter SEVERAL times for the first couple tanks of fuel. Typically it's only used if a problem is severe and causing issues.

Yep, having serviced my car myself for the last 13 yrs the fuel filter and fuel in the can, has always has been squeaky clean. This time filter looked new after 20K miles as always. However the fuel in the can shocked me being cloudy. As I said I extracted the fuel. Normally I leave the fuel in when it's clean. Put it together. It is running fine.

There was no big ambient temp swinging, just a light cooling (from 90's to high 80's). That is a great relief from the blow torch temps we had the last few months. Fall can't come quicker.

My plan is run a tank of gas though it, refill, drive a bit, and take the fuel filter out and take a look again. It should be OK. This area in Tennessee does not get that cold, only a week or two below freezing typically, snow is rare, single digit temps every 10 yrs. I clearly got water in the tank. Thanks for reply.

 

[lemoncurd]

My plan is run a tank of gas though it

i certainly hope not

 

[oilhammer]

We have about 600 hours on our Bobcat T66, and have never noticed anything but clean red diesel in the bottom of the water separator. After refilling the fuel tank, via the same method for all the other times, and from the same source as all the other times, and the same source for all the rest of the equipment, about 20 minutes in... the "derate: water in fuel" warning came out. Got out and checked, the bottom of the separator was nothing but clear-cloudy water. Drained it out (about a cup) until fuel came out. Reset the alarm, never did it again.

Sometimes.... ya just get a bad batch. In this case, the sensor did its job.

 

[gmcjetpilot]

i certainly hope not

Can you be more cryptic? Your point. What should I do?

The car is running fine. I drained (extracted fuel/water mix out) and replaced filter. What is the problem?

 

[lemoncurd]

Can you be more cryptic? Your point. What should I do?

The car is running fine. I drained (extracted fuel/water mix out) and replaced filter. What is the problem?

more playing on the specific words you used. "gas"
running a tank of gas through your TDI would be catastrophic.