Subjects>Auto>Asian Cars

Oil on sparkplug

Anonymous

∙ 10y ago

Updated: 10/20/2022

If the firing end of the plug is oil contaminated it can indicate

Piston rings worn/broken

Head gasket oil leakage, internally into the bores

Valve stem oil seals leaking

Cracked head or block

or simply the engine is over filled with oil.

Wiki User

∙ 10y ago

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