If the car overheated, you may have warped the aluminum head. You may have to have the head shaved and a new head gasket put in.
Radiator
Nissan Bluebird was created in 1959.
Have you checked for Carbon Monoxide in the radiator coolant? If it's there, you have a leaking headgasket. The problem is, if your Nissan overheated for any reason, the head can warp and result in a leaky headgasket. Once that happens you'll never be able to keep it from overheating.
open the radiator cap, find the plug at the bottom right of the radiator and open it to drain old coolant
Nissan Bluebird Sylphy was created in 2000.
Generally on the bottom of the radiator.
located at the bottom of radiator
my 2000 nissan altima wont start has new radiator and spark plugs the computer test shows no problems it recently overheated
Once the cooling system has had time to depressurize, open the radiator cap and pour your coolant in.
How to locate my starter in my Nissan bluebird engine
Open your radiator cap and see what color the coolant is and replace it with the same color coolant, it doesn't matter what brand it is.
I have never heard of a Nissan bluebird but federal law forbids the disconnecting of the odometer