Fuel Filter - From the dark side.
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New User
Joined: Nov 2006
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From: Austin, TX
Fuel Filter - From the dark side.
Hey guys, I just replaced my fuel filter yesterday for the first time. I have only owned the truck for about 3 weeks. It’s a 2002 F250 with 66K miles on it. I was a little alarmed when I pulled the old fuel filter. It was completely charcoal black. Are all fuel filters white to begin with? Is this normal?
I have run about 1/2 a tank with Diesel Kleen (about 12oz for 26 gal of fuel). Would this cause the filter to turn black? Or did the guy never change the fuel filter?
Also, when using the water drain on the separator, how long do you leave it in the open position? I made a nice puddle of fuel and it never stopped flowing. Normal also?
Sorry for all the newbie questions, this is my first (but not last) diesel!
Thanks
I have run about 1/2 a tank with Diesel Kleen (about 12oz for 26 gal of fuel). Would this cause the filter to turn black? Or did the guy never change the fuel filter?
Also, when using the water drain on the separator, how long do you leave it in the open position? I made a nice puddle of fuel and it never stopped flowing. Normal also?
Sorry for all the newbie questions, this is my first (but not last) diesel!
Thanks
Senior User
Joined: Apr 2004
Posts: 349
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From: Port Murray, NJ
Yes, all filters are white to begin with and they do turn black depending on how long they've been in there. Eventually they won't be a black if you change at regular intervals.
Not sure on the draining thing. It should stop. If not you will have to replace the O-ring in it. Some one else will have mor info on that.
Not sure on the draining thing. It should stop. If not you will have to replace the O-ring in it. Some one else will have mor info on that.
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New User
Joined: Nov 2006
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From: Austin, TX
Originally Posted by wilbur996
Not sure on the draining thing. It should stop. If not you will have to replace the O-ring in it. Some one else will have mor info on that.
Thanks for the replies fellas.
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New User
Joined: Nov 2006
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From: Austin, TX
Originally Posted by ponch37300
I drain mine into a bucket about 12" in diameter and it filled 1 to 2 inches of it. Alot does come out but it will eventually stop.
-Brent
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Joined: Sep 2006
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From: In the Georgia Pines
according to the owners manual, it says to leave it open for 25 seconds or until clean diesel comes out? either way it's alot of diesel!
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New User
Joined: Nov 2006
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From: Austin, TX
Originally Posted by pullinair
Youre not opening it with the engine running are you?
I guess there is a fixed volume of fuel in the seperator and all of it must be drained?
BTW, how long will a platter sized diesel puddle stay on the driveway? (oops, remember bucket next time)
Senior User
Joined: Sep 2006
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From: In the Georgia Pines
i had to clean if off with the pressure washer and some soap... wife was not too happy. i recommend using a foot long rubber hose, either 1/4" or 5/8" should work and attach it to the drain tube on the right side front of the engine. then let the tube hang over the drain pan. it'll help direct the diesel into the pan and not all over your driveway.
Posting Guru
Joined: Jan 2006
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From: Elkhorn, WI
yup the 5-16 gas line connected to it works great so you dont get diesel all over. when i change mine i open the valve and turn the key on, not the engine on just the key in the run position. this will run your fuel pump and get all the old diesel out of the fuel bowl and also any junk sitting in it
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Joined: Feb 2006
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From: Middle Tennessee
Originally Posted by Muktown
yup the 5-16 gas line connected to it works great so you dont get diesel all over. when i change mine i open the valve and turn the key on, not the engine on just the key in the run position. this will run your fuel pump and get all the old diesel out of the fuel bowl and also any junk sitting in it
If you are replacing the filter, I just open up the valve and drain it all out. Then refill with clean fuel right from the top of the bowl. Of course I have a bleed return system and don't pour fuel in the bowl because I fill it with the pump until I eliminate all the air. You want to eliminate air in the bowl. Since the feed lines are on the bottom of the bowl, at least half full is a minimum but full is better to eliminate aeration of the fuel.