New injectors what cup to use???

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Binderdavemays1, Oct 7, 2024.

  1. Binderdavemays1

    Binderdavemays1 Bobtail Member

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    So installed new injectors in the 1984 international eagle big cam 350 turned up 400. The injectors were supplied by the last owner, but the truck did not run correct acted like it was dumping water down through the cups and was putting too much diesel to the motor.
    I eventually had the truck towed to my house cause I didn’t like the way it ran. I want to pull the injectors back out, pull their heads and replace the cups. What material do I use and what cup do I use please? They make cups in different materials just want to use the correct ones.
     
    Last edited: Oct 7, 2024
    Reason for edit: Additional information
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  3. Inderjit

    Inderjit Medium Load Member

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    The injector cups are made of copper. There are special tools required to install roll and cut the seat to the correct protrusion. Pull the injectors and pressurise the cooling system and see if any of the cups are leaking.
     
  4. Binderdavemays1

    Binderdavemays1 Bobtail Member

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    Pressurize the cooling system
    With air im assuming
    The old injectors were junk and there was water in the oil
     
  5. Inderjit

    Inderjit Medium Load Member

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    Yes about around 10 psi should be adequate.
    Do you have a rad/cooling system pressure tester?
    How much water was in the oil and was it water or antifreeze?
     
  6. Binderdavemays1

    Binderdavemays1 Bobtail Member

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    Antifreeze it appeared
    No rad tester yet
    A lot of water
     
  7. little cat 500

    little cat 500 Road Train Member

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    injector tubes are junk think you have to pull the heads for that
     
  8. Inderjit

    Inderjit Medium Load Member

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    Yes you have to pull the heads.
     
  9. Binderdavemays1

    Binderdavemays1 Bobtail Member

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    Oh, not worried about pulling the heads soda. Speak, more worried about calling the cops and replacing with new ones sounds like it’s a bit of a process.
     
  10. Binderdavemays1

    Binderdavemays1 Bobtail Member

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    I don’t like voice text
     
  11. Binderdavemays1

    Binderdavemays1 Bobtail Member

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    That should say I’m not really worried about pulling the heads as much as I am pulling the old cups and replacing with new ones it sounds like it’s a bit of a process
     
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