overheating problems 89 525i

[Unregistered]

If the radiator is clogged will it possibly cause this problem. The coolant doesn't get hot in the radiator when the car overheats.

The 525i is hard to bleed... You need to follow the procedure in BMWE34.net.
Meaning blowing with your mouth in the radiator filling neck and bleeding the thermostat housing bleed screw then the radiator bleed screw.

Ok, you need to find why the car overheats... Could be many things.

Tell us if it overheats at idle or any other time

[Bruno]

Could be the radiator or the thermostat. I will start by changing the thermostat (cheaper) then BLEED the circuit. follow the instructions I gave you.