yea its depressing i guess its the head but i cant visualy see any cracks but and i rotated the engine to check the cylinder walls also and cant see any defects. is there anywhere else i should check? but im not going to get the head checked because the cheapest i can get it looked at is 125 and i found a junk yard with lots of l28 and a maxima 810 2.4l for 150 and they will remove them