Fuel/water separator filter turning black
09-05-2020, (Subject: Fuel/water separator filter turning black ) 
Post: #1
Fuel/water separator filter turning black
I have a new to me 2019 565 X15, 177k. My fuel/water separator keeps turning black. Thought it was algae, but the tanks are sparkling clean. I just had Thermoking install a new tri pac, thought maybe they got trash when installing the pick up tube. Changed it at 5k miles, then it turned black again. Changed it at 5k miles again. Now I’ve driven 1k miles on this filter and it’s turning black again. Any suggestions?

1st filter

   

2nd filter

   

3rd filter

   
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09-05-2020, (Subject: Fuel/water separator filter turning black ) 
Post: #2
RE: Fuel/water spectator filter turning black
Welp, can’t edit the title after my iPhone auto corrected the word separator. But you all know what it’s supposed to say lol...never mind fixed it.
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09-05-2020, (Subject: Fuel/water separator filter turning black ) 
Post: #3
RE: Fuel/water separator filter turning black
Take fuel sample and send it to a lab, find out exactly what it is.


User's Signature: Warranty??? Yeah right, I am the warranty!!!
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 Thanks given by: Explosia
09-05-2020, (Subject: Fuel/water separator filter turning black ) 
Post: #4
RE: Fuel/water separator filter turning black
I've got the same issue with my 2250 but it has the cartridge type filter. There are threads on here about Asphaltene, I assumed that this is what is going on with mine. I normally just change my filter mid oil change. Here's a picture of my filter at about 7,500 miles.


Attached File(s)Thumbnail(s)
   
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 Thanks given by: Explosia
09-05-2020, (Subject: Fuel/water separator filter turning black ) 
Post: #5
RE: Fuel/water separator filter turning black
looks quite normal to me. I have never sen a davco filter that was 10 microns "NOT" turn black... its doing its job.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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 Thanks given by: amermextrucker , Explosia
09-05-2020, (Subject: Fuel/water separator filter turning black ) 
Post: #6
RE: Fuel/water separator filter turning black
I have paccar water separator on my truck. Both fleet guard and paccar branded filter turns black. Have a fuel restriction gauge and it doesn't make it to 5 before I change the filter at 15000 miles.

I figure it's normal for the filter to turn dark work use.


User's Signature: 2015 Kenworth T660
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09-05-2020, (Subject: Fuel/water separator filter turning black ) 
Post: #7
RE: Fuel/water separator filter turning black
Mine does the same thing. I use the 7 micron, and replace about every 6k to 7k miles.
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 Thanks given by: Explosia
09-05-2020, (Subject: Fuel/water separator filter turning black ) 
Post: #8
RE: Fuel/water separator filter turning black
my filters turn black in my davco but only upto the fuel level in bowl so far my filters 7microne last about 20k miles before i start getting above 5inhg on my filter restriction gauge and thats when its up to the replace line.


User's Signature: 2010 Lonestar - CM871 - 13sp - 3.70s, 2016 T680 - cm2350 - 13sp - 3.36s - skateboarder
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09-05-2020, (Subject: Fuel/water separator filter turning black ) 
Post: #9
RE: Fuel/water separator filter turning black
What do these filter restriction gauges look like and where are they located? I kind of like the idea of having a quick check indicator on the fuel lines.
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 Thanks given by: tree98





  
  
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