How to pressurize your radiator?

73 el camino have changed the thermostat and water pump and all radiator hoses and alternator belt, what else can it be?
How to pressurize your radiator?
what about replacing the radiator [i assUme its overheating}? could b 30 yrs old and is it tuned up? bad plug or wire can cause a hot running engine...pressure the rad? they sell the tool to pressure test rads at any auto parts store
How to pressurize your radiator?
you did not state the problem
most radiator shops will do this for free. If you want to do it yourself you'll have to buy a kit or see if you can rent one at a parts house. But how it works is you take your cap off and put the right size cap on hook a hose to it and pump up to the psi on the radiator cap you take off and look for leaks
Radiator scaled up. Some raditor shops can descale them , but depending on what type it is. Possibly the water jackets in the cylinder head can also be scaled up.
the heat from your engine will pressurize it. Is their a leak somewhere? You shouldn't need to pressurize it by yourself.
what degree thermostat did you put in? that make it go hot then cool