How tight is too tight?

Discussion in '40- & 55-Series Tech' started by mountainman, Aug 3, 2005.

  1. mountainman

    mountainman

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    After checking the valve adjustment in the 74,I found I can get the feeler gauge
    in,but it's tight.Am I ok with this? Thanks.
     
  2. 2badfjs

    2badfjs

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    you'll also know they are to tight after running the motor for awhile,and when you come to a stop the rig will lose power and die.because the valve clearance will keep the valves open just enough not to seal the head.

    mine did that when i first put a fresh rebuild in my 40
     
  3. IDave

    IDave

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    It should slide in pretty smoothly. Its better to err on the side of too loose than too tight.

    I have found a "go-no go" gauge (from NAPA) is a good thing. It is a stepped gauge that you can use to feel the correct space. For instance, a .014/.016 will let the .014 tip slip in, but not the .016 when you are at the correct spacing.
     
  4. mountainman

    mountainman

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    Thanks,I guess I'm ok then.It's running fine,and sounds like a sewing machine!!
    I just wanted to check them as I've been doing a lot of work on it. I guess as long as I can get the gauge in,I'm good!!!
     
  5. mountainman

    mountainman

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    Thanks Dave. It doesn't slide smoothly at all. A few feel fine,but some seem too tight,even though I can get the gauge in.I read your thread on the "go-no go" gauge.Can you still get them at Napa?
     
  6. mountainman

    mountainman

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    I readjusted the valves today,and loosen them up some. Thanks for the info!
     
  7. IDave

    IDave

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    Good deal. I got my go/no-go at NAPA within the last year and a half. They had it on the shelf. So I assume you can still get it easily.

    I like to check my clearances with the engine running, as you have read before. This is because I sometimes get different readings from the "static" /stopped/ measurements. It may not matter really, but I can tell the difference often enough that I think it is a real change. What I think happens is that the rocker arm screws/lifter tubes have a slight torque after you adjust them that "settles in" after the engine runs again. It might not make the difference in the running of my forklift motor, but the feeler gauge definitely can tell the difference. :grinpimp:
     
    Last edited: Aug 3, 2005
  8. mountainman

    mountainman

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    Thanks Dave,I'll go check. I felt better by loosen them up.I don't need any problems!!
     
  9. Mr. Toad

    Mr. Toad

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    Sewing machine? Wow! Most nF engines sound more like demolition crews. :)
     
  10. mountainman

    mountainman

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    A noisy sewing machine!!!
     
  11. mountainman

    mountainman

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    I tried it with the engine running. I really thought it would be a lot harder. Piece of cake!!!
     
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