Buy a kit at auto parts comes with adaptors and instructions
make sure the engine is mostly cooled, and open the peck-cock on the bottom passanger side of the radiator
It is in the gas tank.
change the oil, tranny flush, radiator flush, change fuel filter, serp belt and battery if needed
I have used radiator stop leak before in my 1996 Olds Achieva SC with the V6. I put it directly into the coolant resovor. It went in fine for me. This did not give me much help though. I would not recommend using stop leak. It will clog your heater core and then you will have more than the radiator as your problem. Fine a new radiator and replace it that is the best advidce i can give you.
1992 olds Achieva does not have that switch. ECM receive signal from the coolant temperature sensor and send command to relay #6 for turn on/off the radiator fan. Relay #6 is located in the motor compartment on the fireboard.
yes
Look under the car near the radiator it an aluminum pipe with a red cap.
Alero
To replace most heater cores you have to remove the dash on the passenger side.
I get about 30 miles to the gallon with my olds achieva.
The map sensor is located on the intake manifold on a 1996 Olds Achieva 2.4 liter. It is in the center of the intake manifold.
your local library may have a free shop manual to peek at.. good luck Dave