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Old Apr 21, 2022 | 09:00 AM
  #1  
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Water in fuel

This is how much water I got from the water separator in two weeks…the dealer drained it last when I had the oil changed 2 weeks ago.

The last picture is what I usually get after a month or so. Which I find to be odd.

I ALWAYS go to the same two stations for diesel, they are quality newer gas stations, with advanced water detectors in their diesel tanks.
They both showed me their test printouts and they are clean
I bought a water test kit for diesel and it showed no water coming from their pumps

I live in the country, not a survey, so I’m pretty sure no kids are running around putting water in my tank

I can’t figure this out… any ideas??
Now I’m waiting on my CP4 pump to self destruct

 
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Old Apr 21, 2022 | 09:03 AM
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That's a lot of water to come out of the pumps and no one else be affected. You may have a special friend trying to water your truck.
 
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Old Apr 21, 2022 | 09:06 AM
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Any chance you have a leak in the filler neck that allows water to enter due to road spray, car wash, etc?
 
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Old Apr 21, 2022 | 09:12 AM
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Originally Posted by KeystoneF350
Any chance you have a leak in the filler neck that allows water to enter due to road spray, car wash, etc?
I don’t even know how I would find a leak if there was one…no fuel comes out anywhere, it’s all clean everywhere I look around the tank.

the one thing that happened though..when I left the dealer after oil change, it was raining heavily, fast wipers type rain, hard to see on the highway.
 
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Old Apr 21, 2022 | 09:42 AM
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Holy schitt that's a lot of water. I've never seen so much as a drop of water in my separator.

If I were you, I'd keep draining the separator regularly, and make sure you're running some additive. I like Opti-lube. I also recommend the S&S DPK.

Hopefully the separator caught it all and you haven't done any damage yet.
 
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Old Apr 21, 2022 | 09:42 AM
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There's no way to know what comes from those pumps. Try a different station for a few weeks & see if there's a difference.
 
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Old Apr 21, 2022 | 09:44 AM
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Was there any water in the oil change draining? To get that much water there has to be a leak in the system allowing the rain water you drove through into the tank. I have never seen what the fittings look like on top of the tank but I wonder if it is possible one of them has lost it's seal. Since buying my first diesel in 2003 I have never found any trace of water in the filter.
Gary
 
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Old Apr 21, 2022 | 09:55 AM
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Originally Posted by saskowner
Was there any water in the oil change draining? To get that much water there has to be a leak in the system allowing the rain water you drove through into the tank. I have never seen what the fittings look like on top of the tank but I wonder if it is possible one of them has lost it's seal. Since buying my first diesel in 2003 I have never found any trace of water in the filter.
Gary
I’ve had a 06, 09, 12 and never seen water in any. Until this 17.. so I never thought to drain it until the light went off a little over a year ago. Since then I drain it every 6 weeks or so. Changed the separator filter 4 times.
Usually what I get is the bottom picture, which I thought was odd because I never have dealt with water ever before.
And, again, I have only gone to the same two local stations.
 
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Old Apr 21, 2022 | 10:08 AM
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Those stations may have changed suppliers, or maybe their underground tanks are getting water in them somehow. Try buying fuel elsewhere and see if it improves.
 
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Old Apr 21, 2022 | 10:11 AM
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Yeah, change fueling places, and get a locking cap so no joker could be dumping water in it.
Now, you haven't mistakenly put DEF in the fuel filler have you?
 
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Old Apr 21, 2022 | 10:19 AM
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Originally Posted by Ltngdrvr
Yeah, change fueling places, and get a locking cap so no joker could be dumping water in it.
Now, you haven't mistakenly put DEF in the fuel filler have you?
It doesn't look like DEF in fuel. There's a clear line where the water is.

 
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Old Apr 21, 2022 | 10:52 AM
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Holy crap…. Your bottom picture “normal amount” would freak me out. The other amount….. IMO that much water is almost certainly from an external source - a leak or intentional adding of water to your tank by someone. You haven’t really ticked someone off recently have you??
 
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Old Apr 21, 2022 | 10:55 AM
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You have a leak or an enemy, but I'd guess a leak.
 
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Old Apr 21, 2022 | 11:50 AM
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Originally Posted by morehouse7
You have a leak or an enemy, but I'd guess a leak.
I don’t think some is putting water in, they would have to be doing it constantly for the last 3 years on a regular basis. Sneaking up to my house well out of town, at night with out my dogs barking.
I’m thinking maybe a leak, but how could I have a leak when no diesel ever splashes out. I top off to the neck all the time.

But I’m going to have to side with it has a leak.
Unless the stations are manipulating their computer printouts for water detection and lying to me. (and the one place said his pumps will shut off if it hits a certain level)…and my water test kits were all false readings. Done at different times.

And if the CP4 pump rusts with “trace” amounts of water… I think my pump has seen more than a trace amount.

I would love to just trade in the truck, but there are no trucks available any more. Lol.


 
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Old Apr 21, 2022 | 01:20 PM
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The only time I've seen water like that when using a fuel source that I believed to be good is with tractors that sat a lot in-between use. Water collected in the tanks from warm/cool cycles in the weather. I try to keep the tank full if our truck will be sitting a while to flush out any moist air.
 
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