There should be a drain at the bottom corner of the radiator on the side facing the engine.
Drain plug? Either at the bottom or rear of radiator
in the fuse box
On my 1990 Buick Regal, I need an 18mm wrench , a 10mm wrench, screwdriver, jack, and a can of brake cleaner
Place something to catch the engine coolant beneath your 1990 Chevy Corsica radiator. Remove the radiator drain plug with a 9/16 ratchet. The engine coolant will drain out.
Remove the radiator hoses from your 1990 Buick LeSabre radiator. Remove the radiator stabilizing arm retaining bolt. Remove the radiator retaining bolts. Reverse the process to install your new radiator.
It's computer controlled. No timing adjustments are possible.
Could be a bad thermostat or heater core
Generally on the bottom of the radiator.
inside the radiator hose
Isn't a heater supposed to blow warm air?
on a 1990 Cherokee it is passenger side, halfway down the radiator,best way to get to it is remove the grille. The Jeep Cherokee radiator drain plug is plastic and very fragile. You should remove the lower radiator hose to drain the cooling system.