Screwed into the heads.
6 Its a V6
under the coil packs
The spark plug tubes need replaced.
Possible bad valve seals. I have had this problem with my 1999 and that is what I was told.
You need a spark plug socket with a rubber grip inside to lift the plug out.
.035 in.
Using a torx head wrench, remove the two screws holding each individual coil to the top of the motor. Once removed, the coil comes straight up and off revealing the spark plug below. The engine has no spark plug wires (a good thing if you ask me). Removing the spark plugs are extremely easy to do!
.035
.035
.035 inch
0.50