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Fuel water separator draining

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Old 09-18-2011, 08:19 AM
p12483 p12483 is offline
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Fuel water separator draining

I am new to diesels as far as ownership. How often should I be draining my water separator. I have no indicator lights. Saw ricks trouble with possible warranty denial due to water in fuel so wanted to check and see. Only have 1100 miles and 3 fillups.
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Old 09-18-2011, 08:33 AM
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It's recommended that you drain the fuel/water separator once a month to remove contaminants. See page 67 of your diesel supplement!
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Old 09-18-2011, 09:57 AM
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It is always a good practice to get into a preventive maintenance routine with these trucks. I go back to my old Army days where there was a specific routine for each piece of equipment before it was operated. I do the same with this truck and my farm equipment. Everyone is different and has their own way of doing things. At minimum, I recommend you follow the manual for the different maintenance tasks.
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Old 09-18-2011, 02:07 PM
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I drain mine monthly.
The low cost of lost diesel is much cheaper than a new fuel system.
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Old 09-18-2011, 02:10 PM
GCLL GCLL is offline
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Doesn't the computer let you know when it needs drained?
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Old 09-18-2011, 02:36 PM
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Originally Posted by GCLL View Post
Doesn't the computer let you know when it needs drained?
There is a sensor, but you're still supposed to drain it monthly. If there is water sitting in the DFCM there is a higher likelihood that too much water will make it past the filter and into the high pressure fuel system. This can cause rust, pump failure, injector failure, and other very expensive problems. The 6.7L engine with it's Bosch system seems to be more resilient, but I wouldn't want to find out the hard way!
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Old 09-19-2011, 05:01 AM
F2502011 F2502011 is offline
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Glad I ran across this thread. Had the truck for 7 months and have never drained it didn't know it needed to be done so often and still wouldn't if I hadn't read this. Hopefully no damage has been done. Is it easy to do?
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Old 09-19-2011, 05:06 AM
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Glad I ran across this thread. Had the truck for 7 months and have never drained it didn't know it needed to be done so often and still wouldn't if I hadn't read this. Hopefully no damage has been done. Is it easy to do?
You should be fine. I drain mine monthly and have yet to see any water in it. I think it all depends on your fuel sources. The step-by-step instructions are in your manual, that is the best place to look before you do it the first time. Very simple to do.
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Old 09-19-2011, 06:10 AM
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This is good info, guess I need to drain mine. I assume that using a fuel additive like the motorcraft brand will help reduce the water.
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Old 09-19-2011, 09:11 AM
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Quote:
Originally Posted by GCLL View Post
Doesn't the computer let you know when it needs drained?
I was convinced early on to consider the WIF light to indicate an issue.
Ie; stop now and figure out why if it does turn on.
I've never had any water in my fuel but I wouldn't know that if I didn't drain it.
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Old 09-19-2011, 09:24 AM
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Anyone know if draining water from the fuel separator is standard practice for a dealer while performing an oil change/service.
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Old 09-19-2011, 09:47 AM
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I drained my separator for the first time. I drained it for about 25 seconds as recommendeds by the supplement. I really did not see any water (I don't think). The fluid must have been diesel fuel. How do you tell the difference between water and diesel fuel??? If I continued to drain the separator, will the fluid finally stop, or will it continue to drain diesel?

The diesel fuel is very pungent. Before my wife let me into the 5th wheel I had to change my closes and wash up.

ken
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Old 09-19-2011, 09:50 AM
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Quote:
Originally Posted by wtrlogd View Post
Anyone know if draining water from the fuel separator is standard practice for a dealer while performing an oil change/service.
It was not a standard practice at the dealer that I use...but it is now...the last 3 oil changes since I had the injector failure all received a water separator drain.

My truck gets drained every other tankful.

Regards
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Old 09-19-2011, 09:55 AM
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Quote:
Originally Posted by kabur66 View Post
I drained my separator for the first time. I drained it for about 25 seconds as recommendeds by the supplement. I really did not see any water (I don't think). The fluid must have been diesel fuel. How do you tell the difference between water and diesel fuel??? If I continued to drain the separator, will the fluid finally stop, or will it continue to drain diesel?

The diesel fuel is very pungent. Before my wife let me into the 5th wheel I had to change my closes and wash up.

ken
You will see water bubbles at the bottom of the container once you leave it settle for about 5 minutes. It's very easy to see water in fuel since it is heavier than the fuel and sits on the bottom. If you have a lot of it, you will see a clear cut line between the fuel and water. Hope this helps.
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Old 09-19-2011, 01:27 PM
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Just drained mine about an hour ago...no water that I can see. Kinda makes one nervous though if we get bad fuel from a filling station.
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