I just replaced the plugs on my V6 caravan @ 80k miles. They were pretty worn. I recently noticed a thread on a multitude of theories on how to replace the plugs - including removing the manifold. Heres how I did it: The drivers side rear and the middle rear can be removed from beneath. Not the easiest reach - but no big deal at all. For the Passenger side rear - I wound up pushing the alternator back & removing the alternator brackets. You can then pretty easily reach that plug as well. ( the tensioner belt also goes through one of the brackets. My serpentine belt tensioner was shot again- seized solid ! - so you may as well plan for replacement as well. ( , napa ) The belt system is so much quieter now Mark