drpaul87

Anyone know how to change them on this model? Any feedback on bosch platinum 4?
thanks for any and all help

Dale Aeppli

Forget the BOSCH,. really not worth money. Use CHAMPION jeep seems to like them Dale
http://www.wjjeeps.com/service/sparkplugs.htm This a site on changing plugs.

sector95

I guess what's got you stumped is the COP (coil on plug) setup of the last model years 4.0l engine. There is no distributor and no plug wires... what you have is a "block" that incorporates the coil packs and the spark plug boots. You will have to remove the retaining bolts holding the coil pack onto the spark plugs (I think there's 3 or 4 bolts). There is an electrical plug connector at the firewall end that you can disconnect...it's a bit of a booger to figure out how to release it and you may be able to swing the block out of the way without disconnecting it. Once you've got the coil pack off, the plugs are removed. I've gone to using the factory recommended plugs (make and model) in all my vehicles; figure the engine designers chose that plug for a good reason. Before you reinstall the coil block, smear a little dielectric grease inside the boots to keep them from sticking and also to help keep a better weather seal.

mike