5 foot lbs
Valve cover torque spec for 4.0 SOHC is 89 in-lbs. - Haynes Repair Manual #36071. This manual is for Ford Ranger Pick-ups, 1993-2005 models, but DOES include torque specs for the 4.0L SOHC engine.
On the valve cover
take a putty knife and put it under the edge
A 1993 Jeep does not have a transmission modulator valve.
some models the pcv valve is in the valve cover on others the valve plugs into intake manifold and is connected to valve cover by hose
SOHC motor (T45 torx bit) 89 in-lbs DOHC motor (10mm bolts) 22 FT-lbs
105 ft
pass.side valve cover at the rear
Not sure about the 1989, but 1990-1993 it goes into the valve cover. Look for a hose running to the valve cover and the PCV valve should be what is at the end of it pushed into the valve cover.
its the hose coming off of the valve cover that's the egr valve
Its part of the liquid line on a Grand Cherokee and on a regular Cherokee you have an expansion valve located on the passengers side firewall..................