I am having a cooling issue with my 89 325i and am looking for ideas. I removed the thermostat yesterday to rule it out. I believe I am either looking at a plugged radiator or a faulty water pump. I am pretty sure the system is well bled so that isn't the issue.
The problem has came on slowly and not all at once. I am running well over normal temp at various times. The car also gets warm very quickly when it's first started up. All of this is reading on the guage and I haven't actually lost any coolant due to overheating. Is there a way to actually check the water pump? I thought about running some radiator flush through the system but I'm not sure it would do any good. How do I go about diagnosing this without throwing parts at the problem?