When the check engine light is turned on, it is an indication that an error has been detected in the engine management system and you need to retrieve the trouble code to find out what is wrong. Thinking and guessing is not going to get you anywhere.
Grey smoke out of exhaust indicates oil being burnt in cylinders or getting to the exhaust system vi the valve seals.
The cylinder head is not supposed to be submerged in oil, there would be some oil at places where it cannont drin back into the oil sump. As to leaks, you need to find out where the leak is coming from.
Thursday, November 22nd, 2012 AT 8:09 AM