make sure the engine is mostly cooled, and open the peck-cock on the bottom passanger side of the radiator
Buy a kit at auto parts comes with adaptors and instructions
change the oil, tranny flush, radiator flush, change fuel filter, serp belt and battery if needed
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.
Look under the car near the radiator it an aluminum pipe with a red cap.
Alero
I get about 30 miles to the gallon with my olds achieva.
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.
It is in the gas tank.
In the fuel tank
no.
Low on coolant? defective sensor should be located on back side of radiator approx. 1/3 down from top
where is cooling fan relay on 1995 olds acheiva