As Per the Mazda Sevice Manual for 1993!
AIR BLEEDING
When the coolant refilling it.
1. Slowly pour the coolant into the radiator up to the coolant filler port.
2. Fill the coolant reservoir up to the FULL level.
3. Install the radiator cap securely and start the engine.
4. Run the engine at idle speed until it reaches normal operating temperature.
Caution If the temperature increase beyond normal, there
is excessive air in the system. Stop the engine, allow the engine to cool, and repeat Steps 1-3.
5. Run the engine above idle several times as specified. Speed: 2,200-2,800 rpm x 5 sec.
6. Stop the engine and wait till the system is cooled down. Remove the radiator cap and check the coolant level. If the coolant level has dropped, repeat the operation from Step 1.