I took my manifold off today because I was going to try to change my knock sensor, no I could not change it the easy way, my hands are too big. Well the intake manifold took me awhile to take off and I had to cut a coupel coolant cords but anyway. There is a little orange thing that connects to the back of the intake manifold and when I took the manifold off there was metal shavings like quite a bit the orange thing is by the 6th cylinder. I noticed also when I changed my spark plugs the coil pack on the 6th cylinder had white stuff all over it and the spark plug looked pretty bad. Do you think its my piston? I still have a warranty and I was just wondering what people think?