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Old 05-19-2019, 09:45 PM   #1
Wrenchbender Ret
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Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,191
Re: spark plug deposits

If you have an auto trans. with a vacuum modulator, the modulator may be bad letting it suck in trans fluid. The vacuum is hooked up to the runner to #8 cyl. Or the oil drain hole in the cyl. head may be plugged up & oil is building up around #8 valves.
George
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