If the temperature gauge is reading below normal operating temp after driving a little while it may be that your thermostat is stuck open. I replaced my thermostat and it fixed mine.
You don't have a heater control valve for this truck.......
in the heater box behind the dash on the passenger side of the truck you have to remove the dash to get to it
The core is probably plugged.
Yes
There wasn't a 1998 Dodge Ram 1500 diesel.
No.
No, the 1994 has a hydraulic governer. The 1998 has a electrical governer.
Yes, that would be a good idea given the age of the truck.
No.No.
yes a 15 inch wheel WILL FIT a 1998 dodge ram 1500
Yes they will bolt up.
Passenger side of the intake manifold.Passenger side of the intake manifold.