before you go tearing into it, see if you can get a pressure tester and test the system. Dont forget the cap, its a common issue and easily overlooked. If there is a pressure leak, the coolant will boil. If there is no pressure leak then there is an obstruction or no movement, check the t-stat to see if it is opening or just replace it, then all thats left is the pump.

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)