A 1991 Subaru Impreza might overheat because of a leaking cooling system or because of a damaged thermostat. You might also have a damaged or leaking radiator or a cooling fan that is not working.
One reasons a Subaru Forester may overheat is because the radiator may need replaced. Another reason could be the thermostat.
Air inside engine
To replace a broken key in a 91 Subaru ignition, you will need to contact a locksmith. The locksmith can cut a key to match your ignition.
You may need to replace the radiator thermostat and gasket.
subaru 91-legacy
Bad thermostat, plugged radiator, blown head gasket in order of expense.
The lack of air intake designed to flow into the motor.
A repair manual
in my 91 it is under the steering column
Almost exactly 4 quarts
In a 1991 Subaru Legacy, the speed sensors can be found on the driver's side of the transmission. They are located towards the rear, and there are three of them.