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Thread: condensation on plugs?

  1. #1
    Senior Member MASTER BUILDER
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    condensation on plugs?

    I just finished firing my BBC 496, ran great! set the timing checked all the usual thingsevery thing seemed fine till the next day, I pulled a plug and it looked like it had water on it, I retorqued the intake (which I had milled to fit) checked the oil for water, it was fine (drained and changed filter) Started it up ran fine, next day water on the plugs again? Presurized rad, no leak down. Is this condensation? or a bigger problem?

    :? thanks for any advice in advance.
    cam67152

  2. #2
    Senior Member RACING JUNKIE BEAST477's Avatar
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    It could be condensation. How long are you running it? Are you running it long enough to bring the oil and coolant temps up to 180-200 degrees, if not that can cause condensation. I've had it happen before when taking off valve covers to check lash.
    BEAST477






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  3. #3
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    I did bring it up to temp in the morning to set timing. But started it up later that night for a short time. Should i try bring it up to temp, let it cool then check the plugs? Then check them them again the next day. By the way its on all the plugs.

    CAM67152

  4. #4
    Senior Member RACING JUNKIE
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    Just curious what is the ambient air temp in your area?

    Cool moisture ladden air will condensate on metal, especially this time of year.

    It might be what your seeing.

    Run the motor till you get it good and warm 180/200ish, let it cool till you can work on it without getting burned - then check the plugs.
    That's what I do.

    Cp
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  5. #5
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    if all looks well... no water in the oil, not over heating, then i agree with cepx, cold weather condensation.

  6. #6
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    I'll try that this afternoon. Temps have been quiet cool, just above freezing, and wet!

  7. #7
    Senior Member RACING JUNKIE TheYellaBrick's Avatar
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    Quote Originally Posted by cam67152
    I'll try that this afternoon. Temps have been quiet cool, just above freezing, and wet!
    THIS will be the issue ! Let 'er get up to temp and I'll bet you'll NOT find H20 on those sparkers.
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  8. #8
    Senior Member RACING JUNKIE BEAST477's Avatar
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    Huh, I thought thats what I said, kinda. Now I'm confused.
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  9. #9
    Senior Member RACING JUNKIE
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    Quote Originally Posted by BEAST477
    Huh, I thought thats what I said, kinda. Now I'm confused.
    yes you did, about the valve cover condesation, i had a guy tell, that hanging light bulb, or shrouded shop light over the engine would cure the problem.

  10. #10
    Senior Member RACING JUNKIE TheYellaBrick's Avatar
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    Beast,
    Us old guys kinda rererepeat stuff, dontchya know :shock:
    :roll: ops: ops:
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