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Should I change the fuel-water seperator when I change the fuel filter?

Discussion in 'Peterbilt Forum' started by Mr. Cob, Oct 23, 2018.

Page 1 of 3
  1. Oct 23, 2018 #1
    Mr. Cob

    Mr. Cob Light Load Member

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    Dec 31, 2013
    Wet side of the mountains, WA State
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    Howdy All,

    My gauges tell me that I have 75 psi of fuel pressure but the fuel filter restriction gauge has gone from the green zone to the red. I have a C-15 Cat engine which has one fuel filter and a fuel-water separator, so should I replace the fuel-water separator when I replace the fuel filter? Thanks for any advice you can give.

    Dave
     
    Mr. Cob, Oct 23, 2018
    Mr. Cob, Oct 23, 2018
    #1
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  3. Oct 23, 2018 #2
    peterbilt_2005

    peterbilt_2005 Medium Rare

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    Commie-fornia come visit we have C. A. R. B
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    We are coming into the fuel blend change. It's always a good idea to swap out that filter and have one onboard
     
    peterbilt_2005, Oct 23, 2018
    peterbilt_2005, Oct 23, 2018
    #2
  4. Oct 23, 2018 #3
    Rideandrepair

    Rideandrepair Road Train Member

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    Always
     
    Rideandrepair, Oct 23, 2018
    Rideandrepair, Oct 23, 2018
    #3
  5. Oct 23, 2018 #4
    Mr. Cob

    Mr. Cob Light Load Member

    268
    383
    Dec 31, 2013
    Wet side of the mountains, WA State
    0
    Howdy peterbilt_2005,

    Thanks for your quick reply. I figured it could do any harm so I am going to swap it out and add one to my list of spares, I have always carried extra fuel filters.

    Dave
     
    Mr. Cob, Oct 23, 2018
    Mr. Cob, Oct 23, 2018
    #4
  7. Oct 23, 2018 #5
    Slowpoke KW

    Slowpoke KW Road Train Member

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    I change the FWS first since it is the primary filter it will clog before the secondary. I generally change the FWS 3-4 times before needing to change the secondary . Just change the FWS, start the truck and see what the gauge says.
     
    Slowpoke KW, Oct 23, 2018
    Slowpoke KW, Oct 23, 2018
    #5
    peterbilt_2005 Thanks this.
  8. Oct 23, 2018 #6
    Mr. Cob

    Mr. Cob Light Load Member

    268
    383
    Dec 31, 2013
    Wet side of the mountains, WA State
    0
    Howdy Rideandrepair,

    Thanks, will do.

    Dave
     
    Mr. Cob, Oct 23, 2018
    Mr. Cob, Oct 23, 2018
    #6
  9. Oct 23, 2018 #7
    Mr. Cob

    Mr. Cob Light Load Member

    268
    383
    Dec 31, 2013
    Wet side of the mountains, WA State
    0
    Howdy Slowpoke KW,

    Thanks that is very good advise.

    Dave
     
    Mr. Cob, Oct 23, 2018
    Mr. Cob, Oct 23, 2018
    #7
    Slowpoke KW Thanks this.
  10. Oct 23, 2018 #8
    Slowpoke KW

    Slowpoke KW Road Train Member

    1,170
    12,825
    Dec 7, 2015
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    0
    It’s what I’ve been doing for the 6 years I’ve had my truck. And I carry spares of each.
     
    Slowpoke KW, Oct 23, 2018
    Slowpoke KW, Oct 23, 2018
    #8
  11. Oct 23, 2018 #9
    peterbilt_2005

    peterbilt_2005 Medium Rare

    3,906
    29,189
    May 4, 2013
    Commie-fornia come visit we have C. A. R. B
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    What year is your truck?

    If prior to 2012 check your fuel lines to pump and cross-over between tanks.
    Changing a fuel line to motor could help safe you a few bucks from starving motor of fuel. A lot of drivers neglect these lines as a truck gets older.
     
    peterbilt_2005, Oct 23, 2018
    peterbilt_2005, Oct 23, 2018
    #9
    bzinger Thanks this.
  12. Oct 23, 2018 #10
    Mr. Cob

    Mr. Cob Light Load Member

    268
    383
    Dec 31, 2013
    Wet side of the mountains, WA State
    0
    Howdy

    My truck is a 2001, it has the 6NZ C-15 Cat engine, as far as I know the fuel lines are clear but is something to check when I get back home about 2,000 miles from where I am now.

    Dave
     
    Mr. Cob, Oct 23, 2018
    Mr. Cob, Oct 23, 2018
    #10
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