Will a bad valve cover gasket cause smoke from exhaust?
No, it will not cause smoke from the exhaust pipe. However the leaking oil can drip on the exhaust manifold where it will be burnt and smoke.
What could cause smoke white to grey in color from underneath the hood just after turning off a 1992 Honda Accord with 234K miles?
Why is some kind of smoke or steam is coming up behind the valve cover somewhere on a 92 topaz Valve cover when the gasket was already replaced and engine degreased?
White smoke from the exhaust, loss of coolant with no apparent leak, oil level overfull, engine over heating, and a white foamy substance on the underside of the oil fill cap and /or dipstick all indicate a blown head gasket. A leaking valve cover will just cause a loss of oil and possible smoking from the oil dripping on the exhaust manifold.
== NO, defective exhaust manifold gasket will not cause this. White exhaust smoke is a sign of coolant entering the combustion chamber. You more than likely as not, have a blown head gasket or cracked head. Stop driving this vehicle until you find out. Look for coolant in the oil, air bubbles escaping from the radiator, and a sweet smell at the exhaust. All indications of serious problems. A compression test will verify if you…