Could be head gasket, but first remove valve cover and eyeball the rockers...sometimes a push rod will slip out of place, or the lash could be too tight (carbon build-up on exhaust valve seat) that valve never fully closes).
Head gasket is blown. Find or buy the factory service manual online. Follow trouble shooting section. Usually head gasket repair is step by step with pictures. Good luck.
Could be head gasket, but first remove valve cover and eyeball the rockers...sometimes a push rod will slip out of place, or the lash could be too tight (carbon build-up on exhaust valve seat) that valve never fully closes).
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