rparker

Hello guys/girls,
Just a little problem thats annoying me. My hydraulic fan in front is stuck on 100% operation so on start up and with anything above 2k rpm its really noisy, now my lexus sounds like a oversized hoover. The amount of air that is pushed even at 2k is so high it will blow newspapers away from behind the car, yes BEHIND!. No its not the exhaust, its very big bore so not much air velocity.

Its also particularly bad when you stretch her legs on those long drives where it feels like something is going to explode coz the fan is spinning so fast and making such a god awful high pitch "hoover with a sock stuck up the pipes" sound.

I even opened up the exhaust a month ago and I can't even hear the damn pipes over that vacuum machine up front.

Now I did some research and the net tells me that the fan is indeed a hydraulic fan which uses ATF fluid to turn the fan. My question is where the heck the regulator is and where is the pump that runs the fan. Is there actually a separate Fan ECU?

Also if anyone knows where the temp sensor is or if its the same one the feeds the gauge and the ECU.

All I want is my quiet lexus back so I can hear the nice V8 burble, I don't want a hoover for a lexus

Please help!!

Och

iTrader: (3)

Seems like a thermostat or temperature sensor is wacked, and activates the fan.

Hit Man X

The clutch fan works off viscus fluid... not a temp sender.

Are your radiator or condenser fins plugged? This causes issues you're seeing.

Harky

I had a similar problem...
The original fan clutch was shot.
Toyota OEM clutch was $110.
Took about 1 hr to do the swap.

Lexushead

Look at the Fan Bracket thread above. It's the bracket that is stuck. Find yourself a fan+bracket from a salvage yard. I replaced mine a few years ago. I replaced both the fan and the bracket.