Thread: Cant take much more ! Overheating again and again

fred smith in bayswater is very good aswell

If you can stop it, then it means it's spinning. If it's spinning then it's cooling. It's not causing the over heating but it is buggered. You have a slipped liner as suggested by others or a blown head gasket, IMHO.

sorry "CAN" stop it

I have had a V8 that did this and it was a gasket. very slow leak.

Originally Posted by nzlandies

If you can stop it, then it means it's spinning. If it's spinning then it's cooling. It's not causing the over heating but it is buggered. You have a slipped liner as suggested by others or a blown head gasket, IMHO.

OK,

I’m confused. I was under the impression that with the viscous fans that they would “spin” naturally. When I start my 2001 TD5 the fan “spins” but I can stop I with a brush. I was under the impression that if on start up you couldn’t stop it with a brush the vicious coupling was stuffed because it was “locked in”. Basically if the fan “spins” and you can stop it when cold it’s OK. If you motor is hot above operating temp and you can stop the fan with a brush it’s similarly stuffed?

I’m confused. I was under the impression that with the viscous fans that they would “spin” naturally. When I start my 2001 TD5 the fan “spins” but I can stop I with a brush. I was under the impression that if on start up you couldn’t stop it with a brush the vicious coupling was stuffed because it was “locked in”. Basically if the fan “spins” and you can stop it when cold it’s OK. If you motor is hot above operating temp and you can stop the fan with a brush it’s similarly

When cold a viscous fan will usually roar for a couple of minutes. This is because the viscous fluid has pooled in the bottom of the fan and takes a bit of time to redistribute. It will be relatively hard to turn if the car has been off for a while. Once the roaring stops it will be relatively easy to turn.


There is a bimetallic "spring thing" in the front of most fans. When at low and normal operating temp the fan will be easy to spin as the orifices are all open to let the fluid through.

As the air through the radiator gets hotter the metal "spring" expands and closes off the fluid orifices in the fan and stiffens it up. So if the car is quite hot the fan will roar and you will feel a loss of power,and it will be hard to turn.
Regards Philip A

My Disco would go up to half on the temp gauge, then the temp would slowly creep up,
I soon relised the Viscous was not engageing when the temp was rising.
I took mine off and have locked the fan, as i have a new viscous on order.
Now the temp doesn't move past half.
Luke

Be careful to keep the revs low, or you may have a lovely vented bonnet,particularly if a white V8 fan.
Regards Philip A

When my viscous fan was stuffed the temp was fine just running around town. But with more load on the engine - on the highway or driving up a range it would overheat.