The failed head gasket scenario doesn't play, if it were the issue you would have more of a steam out the tail pipe and loss of coolant type of thing going on. If I am wrong about the gasket, then the casting could be cracked. These are worst case and I don't like the worst case for engines that have not been overheated, ever. BTW, have you or has the engine ever been overheated? To your knowledge? A sensor or module would command the check engine light on, if there were a failure. If there is coolant in the combustion chambers, a peek into each of the cylinders with a bore scope might aid this diagnostic, look for cylinders that have been washed clean, at 122k miles there should be some carbon build up.
Saturday, October 17th, 2009 AT 10:14 AM