93 Caravan water pump

Hello all.
I am being lazy by posting this. My 93 Caravan (140,000... 3.0L V6) has developed an overheating issue. I was looking to find out if the water pump is driven by the timing belt, and if so, if anyone had the timing diagram and or any helpful hints. I am no stranger to this type of repair, but I do know the value of others input. I am guessing water pump because the radiator is full and has good pressure. It just gets hot during normal operation, and up till now I have had no problems in three years.
Thank you in advance.
A

pump is driven by the timing belt,but has the thermostat been changed lately?cheap and easy to replace, good place to start with. Also a plugged rad can cause overheating and still be full.

The thermostat was bad (stuck open). However the timing belt was so loose it could not adequately drive the pump. I changed the pump anyway and all is well. EXCEPT: Now it smokes at long lights (in other words on idle) from the exhaust. Maybe the valves are shot. Worst case I will just switch to synthetic oil so you at least don't SEE the smoke. Thanxs for your input.
A

smoking at idle usually caused by bad valve seals,can be done with the head still on the engine

smoking at idle usually caused by bad valve seals,can be done with the head still on the engineSo A valve seal is not the ring that it seats on I am guessing? Are they under the valve cover? I guess I will get in the Haynes manual and read up on it a little.