Drain plug? Either at the bottom or rear of radiator
To drain the radiator fluid in a 1990 Cadillac Eldorado, start by ensuring the engine is cool and then locate the radiator drain valve at the bottom of the radiator. Place a drain pan underneath the valve, open the valve, and allow the coolant to completely flow out. After draining, close the valve and refill the radiator with the appropriate coolant mixture. Always dispose of the old coolant properly, as it is hazardous to the environment.
It's a valve that opens or closes flow through a radiator
radiator drain valve is located at the bottom of the radiator, there is an access hole through splash guard.
its a valve to let the air out of the system
A thermostatic radiator valve is a valve that is connected to the hot water heating system. It can control the room temperature by regulating the amount of water that goes into the radiator. The valve is able to control this by sensing the temperature of the air.
The purpose of a steam radiator valve is to control the amount of steam that enters the radiator, thus regulating the heat output of the radiator. The valve opens and closes to allow more or less steam to flow through the radiator, adjusting the temperature in the room.
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.
The first step that you can take to fix a radiator is to see if it needs to be bled. To bleed a radiator you will need a radiator bleed key. Unscrew the valve at the side of the radiator and when the first drop of water comes out, close the valve again. If this does not fix the radiator you will need to call in a plumber.
pressure-relief valve
Check valve
The purpose of the air valve in a steam radiator system is to release trapped air from the system, allowing steam to flow freely and efficiently heat the radiator.
plastic valve on driver side on inside of radiator