Hi I have taken the engine out of 03 vespa gt 125 to clean..I have left it overnight at an angle not flat and noticed some oil has leaked from the exhaust manifold..
Is this a problem
Or because I've left not flat..
The only way the oil can get to the exhaust is through the valve stem seal. But unless the engine is not smoking grayish its not a problem. These seals are designed to pass some oil to lubricate the valves while the engine is running. There are oil cavities in the head, when you tilted the engine some oil must have gone into the exhaust valve. I'd clean it of course.
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