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Mike S.
Mike S., Chevy Mechanic
Category: Chevy
Satisfied Customers: 6777
Experience:  ASE Certified Master Technician
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Chevrolet C10 4x2: 85 c10 305 fed, Plugs 8 and 6, keep

Customer Question

85 c10 305 fed,
Plugs 8 and 6, keep fouling, and are wet , pulled valve cover and checked all oil ports and cleaned them, compression tested all 8 all are in spec , thought bad valve seals , but symptoms are not there, bad head gasket ? Intake man gasket? Rings?
Submitted: 1 year ago.
Category: Chevy
Expert:  Mike S. replied 1 year ago.
What are they wet with? Oil, gas, etc?I assume oil since you are concerned about oil ports and valve seals. I assume when you said oil ports, you meant the oil return holes in the head. A compression test would have shown if the head gasket was blown. A good way to tell if the oil is getting into the combustion chamber from either stuck oil control rings or worn valve guides or bad valve guide seals is allow the engine to cool and all the oil drain back into the oil pan, then start the engine and see when the exhaust blows out light blue smoke. If the smoke starts almost immediately then it's the piston oil control rings that are stuck and most likely due to carbon buildup which could have been caused by a bad pcv valve (stuck). If it takes a few minutes before the exhaust starts blowing out light blue smoke then it has taken a while for oil to build up on top of the head and get sucked in past worn valve guides or bad valve guide seals.
Expert:  Mike S. replied 1 year ago.
Do you have any questions?
Expert:  Mike S. replied 1 year ago.
Did you find the problem?

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