In the FSM for my 98 TJ, it list the torques the same for the 2.5L and the 4.0L. I am told that the 4.2 and 4.0 are essentially the same motor. Here they are:
Oil Pan Bolts: 1/4 - 20 bolts 84 in. lbs.
5/16 - 18 bolts 132 in. lbs.
Drain Plug 25 ft. lbs.
Oil Pump Bolts: Short Attaching Bolts 204 in. lbs.
Long Attaching Bolts 204 in. lbs.
Cover Bolts 70 in.lbs
Main Bearing Caps: Bolts 80 ft. lbs
HTH,