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Leaking oil tube seals. Replace the valve cover gasket and the oil tube seals. Clean out the oil tubes. Replace the spark plugs and you'll be good to go.
The valve cover gasket seals are probably old and brittle and they are not sealing in the oil. This happens to most vehicles as they get older. With coil on cap plugs, oil will fill up the spark plug tubes and it will start to missfire. New valve cover gasket seals are probably needed
THe engine is burning oil and fouling the sensors and clogging the converter. This could be caused be a faulty PCV valve, bad valve seals or piston rings, This condition only gets worse = as the converter clogs it puts back pressure in to engine and forces motor oil back into the air intake thru either the PCV passage or vent breather tube. You can try to clean some of crud out of the converter and exhaust system with a good additive like Seamist or Techron, etc. The underlying cause will still cause it to clog again is you don't repair the root problem.
Yes, you need a Rocker cover (valve cover) Gasket kit. Remove the valve cover, remove all old O-rings and cover gasket, clean grooves and mating surfaces without gouging or scratching them, put the new gaskets on as per factory recommendations, tighten to the proper torque and you're done. The spark plug holes in the cover are part of the valve cover gasket kit. Any Napa, Car Quest, Pep Boys, Auto Zone will have it.
You need to replace the valve cover gasket.Under the valve cover are four tubes that the spark plugs fit down into. between these tubes and the inside of the valve cover is a series of round gaskets that fit on these tubes. When they get old they leak oil into these tubes.replace spark plugs and wires when you do the job,they are most likely finished.Its a nice job for a Saturday morning,about an hour. Good Luck
Most likely a worn ring or valve seal. You'll have to check the compression to be sure which problem it is. If the compression is normal then the seal is most likely leaking. If the compression is low then the ring is worn.
I would try snugging down all the valve cover bolts before replacing anything. A valve cover gasket kit should have the grommets and gaskets necessary to repair this if you find no loose bolts.
replace the front oil seal. first i would clean the engine with purple power (degrease etc.) then look at the engine and make sure the leak is not coming from above like possibly the valve cover gasket or from the oil sending unit. try to tighten the bolts on the valve cover and even the oil pan. you never know, you may get lucky. i don't know where you are but front seals are cheap but the labor on the job is what costs you.
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