Hello again, Ranger Rangers
Love the forum.
Just read Vrod21's excellent post on changing spark plugs in the 4.0L
I worry about over-tightening the plugs. He states they should be tightened 1/16 of a rotation. I was thinking of using a torque wrench. Would that be more foolproof?
The box says 15 ft/lbs (which = 180 in/lbs--for my wrench.)
Does this sound excessive?
Due to a bit of rough starting (91K miles) I decided to throw plugs and new upstream O2 sensors at it. Any other inexpensive parts that might help?
Thanks for any consideration.