Now that it is getting cold again, I have confirmed that there is something wrong with the stock cooling fan on my '89 Turbo. The fan no longer turns off when it is not needed. The other day it was about 45 degrees outside, and the fan stayed on from start-up until I shut the engine off about 30 minutes later. The engine temperature gauge hasn't read above approximately a third of the way up, but I can't remember the fan ever turning off in a couple months. What might cause this? Could it be a sensor or the fan clutch?
Fan always on
- Thread starter Spun MkIII
- Start date
When the motors cold it should move easily
there is a valve on the front of it controlled by a bimetalic spring that adjusts to the temp.
It sounds like your clutch is faulty.
there is a valve on the front of it controlled by a bimetalic spring that adjusts to the temp.
It sounds like your clutch is faulty.
How did the mechanical fan through a clutch run for 30 minutes after the engine was shut down???
Do you mean the a/c condensor fans?
Do you mean the a/c condensor fans?
Nick M said:
Yep...gotta re-read that first post. He means that the fan stay on, meaning that it is heard, and pulling alot of air, all the time the motor is running. He drove the car for 30 min. and he could hear it pulling the whole time. He did not mean that it stayed on after the engine was shut off.:aigo:
Dear Spun MKIII, it seems that some of these fellas aren't reading your first post. No sensor is involved with the fan clutch. Sometimes they just plain go bad. Either locking up, like yours, or never locking up (freewheeling).
Loose ones will cause over-heating.
Loose ones will cause over-heating.
Okay then,if it is the fan mounted to the water pump,and it is staying continuously on when the motor is running,the it obviously seems to be a bad fan clutch!
Thats funny, I'm not sure my fans ever go on at all. Maybe I have the other version of the bad clutch, but I have no overheating issues.
Normally, a fan clutch will be 'stiff' when you first start a cold engine. You will hear the fan for a few minutes, then it will loosen, and the fan sound will die down. It should stay like that until the engine gets very hot, about 3/4 or more on the gage. Then the clutch will lock up, and the fan will roar with its maximum pull of air. It is rare that it locks up.
As you know, when your car is moving above 40mph the air coming across the radiator does not need the extra help of the fan.
As you know, when your car is moving above 40mph the air coming across the radiator does not need the extra help of the fan.
Sorry for the confusion. He didnt say the viscous coupling was locked and the fan would not turn.
If you cant turn the fan clutch, then the coupling is locked and it is time for a new one. Or a Tundra clutch, which is a nice piece.
If you cant turn the fan clutch, then the coupling is locked and it is time for a new one. Or a Tundra clutch, which is a nice piece.
First time I read it that's how I took it that he meant the electric fans but then I reread it a few times so asked him to turn the engine fan!