Hi I have smoke coming from spark plug hole when running I pull the plug and it has oil on it.
Done a compression test and it is running at 115 psi as are all the others.
Wondering where the oil is coming from.
Thanks Alex
Oil on plug 304 v8
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Baillie122
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vlad01
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Re: Oil on plug 304 v8
Either worn bore or valve stem seals or probably both. Pretty common with the aussie made Holden engines, especially once past 200k.
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Charlescrown
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Re: Oil on plug 304 v8
Am I reading this right. You have smoke coming out from around the spark plug when its running. If that's the case the plug is not sealing in the gases. Have a close look at the seat area for something that would not allow the plug to seal properly. If the plug is not seating correctly the engine will most likely pre-ignite which can lead to sudden death.
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MudDuck514
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Re: Oil on plug 304 v8
Possibly a leaking valve cover gasket allowing oil to seep into sparkplug pocket.
Or, possibly a broken seal around the sparkplug insulator (yes, I had a friend that had this happen).
Mike
Or, possibly a broken seal around the sparkplug insulator (yes, I had a friend that had this happen).
Mike