Cat 3406E blew the fuel filter off

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by lciambotti, Mar 16, 2022.

  1. lciambotti

    lciambotti Bobtail Member

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    I have a 1996 Kenworth T600 that I just purchased The owner said it blew the fuel filter off. I found that hard to believe so i put a new cat filter on and....ran for 3-4 minutes and boom it blew off. Look at the picture. Possibly a plugged return line? I am not a cat guy and couldn't find the return. I am open to suggestions!!
    Thanks!!
     

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  3. EverLuc

    EverLuc Light Load Member

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    Oh wow. I have never seen that
     
  4. lciambotti

    lciambotti Bobtail Member

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    Scared the crap out of me!! It popped and I thought "oh great, I threw a rod in the first 5 minutes I owned it"!!
     
    EverLuc Thanks this.
  5. 062

    062 Road Train Member

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  6. lciambotti

    lciambotti Bobtail Member

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    That picture shows the top of the filter. It rest looks like a soup can that has been opened.
     
  7. spsauerland

    spsauerland Road Train Member

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    Holy restriction. Return hose is plugged or pressure regulating valve in filter head is plugged.
     
  8. Smellfunny

    Smellfunny Road Train Member

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    Find whatever is causing it fast before running it again. Should be easy to find.
     
  9. lciambotti

    lciambotti Bobtail Member

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    I hope. Not sure where all the check/pressure valves are. Also looking for the return line. I just don't have much experience with Cat motors. Mostly Cummins and Detroit
    .
     
  10. spsauerland

    spsauerland Road Train Member

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    Post your engine serial #.
     
  11. lester

    lester Midwest's #1 Feed Hauler

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    Fuel return should come off the back side of the head and run back to the fuel filter block
     
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