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Hot plugs- good or bad?

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Shadetree Mecha

03-07-2000 05:58:40




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If you have trouble with spark plugs fouling out you can go to a hotter plug. If that doesn't work you can got to even hotter ones. A concern crosses my mind- will this burn up the pistons or harm the motor over a period of time or is it safe to use hotter ones? Thanks for any suggerstions.




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HR

03-10-2000 03:21:44




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 Re: Hot plugs- good or bad? in reply to Shadetree Mechanic, 03-07-2000 05:58:40  
Shade Tree: The plug just STARTS the fireing of the compressed gasses and can not change the temp of that process, or the heat to the piston, to any notable degree. The heat range of the plug relates to how hot that plug gets by sitting closer or farther from the combustion fire....how's that? ..hr



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Rob

03-11-2000 19:40:53




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 Re: Re: Hot plugs- good or bad? in reply to HR, 03-10-2000 03:21:44  
What about the hot plug causing preignition and/or detonation and destroying piston, valves, etc.? Is this a possibility with too high of a heat range?



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John T

03-07-2000 14:08:35




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 Re: Hot plugs- good or bad? in reply to Shadetree Mechanic, 03-07-2000 05:58:40  
A hotter plug has to do with its designed operating temp as determimed by its reach in the cylinder etc. Its true an oil burner is improved by a hotter temp plug because the residue may burn off better. In extreme applications like a racing engine with hot pistons a plug may not extract enough heat and there may be a hot spot develop, but In and Old JD it would be rare to over heat a pistin due to a too close of a too hot plug. Ol John T in OIndiana

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