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  1. WillWagner

    Nhc250 valve injector overhead adjusting

    Correct Simp, but do NOT do valves and injectors on the same cylinder. A= I-3, V-5, In .011, ex, .023
  2. WillWagner

    Nhc250 valve injector overhead adjusting

    Here are some pics. Line art drawing, non top stop on the left, op stop on the right. Picture, top stop left, non top stop center and HVT/STC on the right.
  3. WillWagner

    Nhc250 valve injector overhead adjusting

    Most had non-top stop. The way you can identify it is just like in the video above. You can see the spring. You can physically pull the spring and plunger out of the injector. A top stop injector has what looks like a giant 12-point nut on the top of it and the only thing you can pull out of the...
  4. WillWagner

    Nhc250 valve injector overhead adjusting

    I just watched this...This guy is confused. The injectors are NOT top stops, NEVER do IBC on these type. Well, I guess you can do what you want, but what he said to do will cause issues.
  5. WillWagner

    Nhc250 valve injector overhead adjusting

    That's funny, I ain't seen that video for ages! But I don't remember the dude having a Brit accent. Don't go messing with the pump, IF you screw up, it can be expensive. But YOUR stuff ain't mine.
  6. WillWagner

    Nhc250 valve injector overhead adjusting

    You are gonna have a hard time running the rack on your NHC, they don't have one, now a Detroit, they do. In a nutshell, positive END of injection is when the injector plunger is fully seated in the cup of the injector. if you watch the injector lever when you bar the engine over, the cam pushes...
  7. WillWagner

    Nhc250 valve injector overhead adjusting

    A screwdriver adapter. Forgot, this isn't an N14. I will look for an image and put that up...my bad. Here's a link, https://store.snapon.com/Flat-Tip-Standard-industrial-3-8-quot--Socket-Driver-Flat-Tip-Standard-Industrial-3-8--P631912.aspx
  8. WillWagner

    Nhc250 valve injector overhead adjusting

    Just a bit of advice here. DO NOT use a screwdriver that has magnetic changeable bits. The bit will fall out and go down into the pan. The bit in the pan isn't an issue, the issue is that if the tool DOESN'T make it to the pan and gets lodged behind the cam follower lever. That will cause the...
  9. WillWagner

    Nhc250 valve injector overhead adjusting

    That would be "A" or VS1-6.
  10. WillWagner

    Nhc250 valve injector overhead adjusting

    There are two ways to set the overhead on an 855. One is the outer base method and the other is the inner base method. The inner base method can ONLY be used on top stop style injectors. The accessory drive pulley is marked differently for the IB method, TDC1-6, A, B, C. Most of the NHC's that I...
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