100,000 miles.
The Dodge Hemi's have 2 spark plugs per cylinder which equals 16 spark plugs
6
yes.
Most new cars go 100,000 miles before they need a tune-up if they have the platinum plugs installed., I would contact the dodge dealer and see what plugs are in your engine.
The coil packs: only if something goes wrong, they are not a 'wear item,' and therefore have no anticipated change timeframe The spark plugs: yes.
16, two per coil
They are under the coils, on top of the valve covers.
on both sides of the engine block.
The hemi has sixteen spark plugs.
you have to remove the plastic covering on the engine and then you will see where the plugs are, the coils rest on top of the plugs.
each cylinder for the V-8s have two plugs, for better power output and cleaner exhaust.