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Author Topic: Oil in spark plugs  (Read 2195 times)

Offline 86charcoalsierra

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Oil in spark plugs
« on: June 15, 2010, 04:15:58 pm »
I changed the spark plugs on my 86 gmc sierra 305 about 3 months ago and about 2 weeks ago it started to misfire i pulled the spark plugs to check them and about 4 of them were full of oil so i changed them wiped out the little oil that was in the spark plug hole and it ran fine. what would cause the oil the get inside the spark plug hole.
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Offline beastie_3

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Re: Oil in spark plugs
« Reply #1 on: June 15, 2010, 06:39:28 pm »
Bad rings
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Offline VileZambonie

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Re: Oil in spark plugs
« Reply #2 on: June 15, 2010, 07:17:17 pm »
Or valve guides or valve seals... If it's really bad just screw in some spark plug non foulers in the mean time
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