Spark plug core broke

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11-14-11, 12:17 PM

smellycat

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Spark plug core broke

This the 2nd plug I've cooked in my 83, what causes plugs to come apart. SC

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11-14-11, 01:32 PM

t_g_farrell

Waffles - hmmm good

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Cheap plugs sometimes. Is that a NGK or some Walmart special like Champion?

The other cause might be detonation or running at too high an RPM, or both.

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11-14-11, 02:26 PM

OneRotor

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It looks like a NGK. I was going to suggest detonation. Maybe NGK had a run of bad plugs?

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11-14-11, 02:29 PM

RotaryEvolution

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or your plug wires have a serious man grip.

(don't read too much into that)

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11-14-11, 02:45 PM

wankel=awesome

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There was a bad run of BUR9-EQ14's about a year ago...

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11-14-11, 03:24 PM

deadphoenix52

meh.

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2 of my ngk plugs did this. just replaced all 4 last week. we'll see what happens

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11-14-11, 03:32 PM

smellycat

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I went to the parts store to buy one plug and he said that that it happens when you install them wrong. wrong size socket wrench or it slips off. SC

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