2. Increased emissions: The oil that seeps past the valve stem seals can also lead to increased emissions, as the oil will be burned along with the fuel and released through the exhaust.
3. Engine misfires: Bad valve stem seals can cause the engine to misfire, as the oil can foul the spark plugs and prevent the engine from running smoothly.
4. Engine knocking: Bad valve stem seals can also lead to engine knocking, as the oil that seeps past them can cause the pistons to knock against the cylinder walls.
5. Engine smoke: Bad valve stem seals can cause the engine to smoke, as the oil that seeps past them can be burned and released through the exhaust.
