Crazy spark plug problem on 440

1966 -1967 Mopars

  1. Jc cooper

    Jc cooper FBBO Gold Member FBBO Gold Member

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    Champion Rj12y on 440 blew complete inside out and left plug wire boot hanging never saw this before

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  2. OKDart

    OKDart Well-Known Member

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    I've had that happen before with Champions, but part of the porcelain was still attached. The engine may have been detonating at the time though. Either way, now I only use Champion on lawn mowers.

    On a positive note, weld an air quick connect to it and now you have a tool to hold the valves closed for spring changes.
     
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