I just bought the car from a local Infiniti dealer. (1,178 miles ago) I was exiting the freeway and it just died. No warning what so ever. Somehow the piston topped out and crushed the plug. I have a carfax of all the maintenance and there where about 4 pages of maintenance including flushes, water pump, oil changes, and even timing belt. I just don't know what else was damaged because of this.