Possible bad batch of Toyota fan clutches!

[Bretthn]

So I recently started experiencing higher than usual temperatures. I had just had my timing belt service completed which included replacing all the coolant, water pump, and thermostat. I had the dealer replace the fan clutch. The next day I had the same issue with higher temperatures. My scan gauge showed 249 degrees and the dummy temp gauge on the dash was just about to hit red when I shut it down.
So with the engine shut down at 249 degrees the fan continued to spin for about 5 more seconds. Pretty obvious the new clutch was not engaged right?
I brought it back to the dealer and told them it was bad. They replaced it again today. I immediately drove around for an hour and experienced the same higher temperatures. I parked in my driveway and let it cool down for about an hour.
At 150 degrees I took a rolled up piece of paper and pushed it into the fan and the fan kept running strong. I shut the engine off and there was resistance in the clutch.
I then drove around the block and brought the temp up to 182 and when I pushed the rolled up paper into the fan it immediately stopped and had no resistance.

Am I misunderstanding how these fan clutches work or do I have the worst luck in the world to have my original fail as well as two brand new ones?

 

[cruiseroutfit]

Very interesting... I was on the phone with a customer just today that asked me if I had heard of the exact same thing. His truck a 1HZ swap into an 80 Series but the fan clutch was sourced new from Toyota in the last few months. The AC shop that was charging the system actually pointed it out.

 

[roscoFJ73]

Maybe there is other problems in the cyl head or maybe the radiator cores are clogged.
It is normal for it to spin for a few second when the engine stops.
Maybe you could get Toyota to check the silicon oil level in the fan clutch

 

[Bretthn]

Maybe there is other problems in the cyl head or maybe the radiator cores are clogged.
It is normal for it to spin for a few second when the engine stops.
Maybe you could get Toyota to check the silicon oil level in the fan clutch

Clogged radiator cores. New radiator solved the problem.
I should have some pics of the inside of the old core sometime soon which I am anxious to see since the old fluid drained free of any particles/corrosion.