ISX Cummins fuel actuator gasket not sealing HELP

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Bigtruckdrivah, Nov 22, 2020.

  1. Bigtruckdrivah

    Bigtruckdrivah Light Load Member

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    Had a real small diesel leak over the last few months, like Barely making the starter wet afte a few weeks. Narrowed it down to the 2 actuators on the right side. Ordered gaskets from Vander Haags for all 4 actuators, they come in a package with “interstate-Mcbee” on it instead of Cummins.
    Installed on all 4, had 2 leaking BAD! Like a fkn sprinkler when I try to start the truck. Pulled the leaking ones off and it looks like I had the new gasket off center some. Put old gasket back on retorqued and 1 sealed up but the other is still seeping slowly. Is there a truck to this? Should go grab some Cummins gaskets and try again?

    I don’t suspect anything from injectors, I do oil analysis every change at 15k and it looks great nothing unusual. And truck idles and runs great. Any advice????? I’m panicking! Gotta load booked for tomorrow ugh
     
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  3. Goodysnap

    Goodysnap Road Train Member

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    Are you certain they are leaking from the actuator mounting? Leaking out the electrical connectors is also extremely common. Dry it up and pinpoint the exact starting point of the leak.
     
  4. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    My experience with my ISX is use only Cummins parts.
     
  5. Bigtruckdrivah

    Bigtruckdrivah Light Load Member

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    When I blow air on it while it’s running, I can see it coming from behind the actuator where the gasket meets the housing. I didn’t know the electrical connectors could leak though!
     
  6. Bigtruckdrivah

    Bigtruckdrivah Light Load Member

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    I sure hope so. Tomorrow I’m heading there first thing to grab some. Just curious if anyone had a similar issue
     
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  7. Bigtruckdrivah

    Bigtruckdrivah Light Load Member

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    This is the style I have. Should I be using the o rings instead of metal gaskets??
     

    Attached Files:

  8. Bigtruckdrivah

    Bigtruckdrivah Light Load Member

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    Got it sealed up. If your actuators are flat with no recess, you need to use metal gaskets. If they have recesses like mine you need o rings. Part #’s below
     

    Attached Files:

    Dave_in_AZ Thanks this.
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