3.0 TD radiator fan

[TASR12]

Should my radiator fan be running from start up or is it a clutch problem? I would have thought it should only spin up when the engine needs cooling? It's on my newly aquired '95 SSRX Gen 2.

[adpsimpson]

It's not got a clutch, it's a viscous fluid one. The hub is filled with oil which increases in viscosity as it heats up, so it will always spin, but faster when it's hotter. Some people have dismantled it an d filled it with silicone instead to have it spin faster the whole time.

There's an electric fan too, on the front of the rad, which is controlled by a thermistor - that will windmill gently at low temps and should turn on only at high temps.

[TASR12]

Apologies, thought after reading Max Ellery it implied there was a clutch set up on it.

[adpsimpson]

Apologies, thought after reading Max Ellery it implied there was a clutch set up on it.

No need for apologies, ask away with any questions. When they get difficult the real experts will step in to answer!

[NiftyNev]

It is a clutch.

This will explain -

http://www.daviescraig.com.au/Fan_Cl...b-content.aspx

Nev

[adpsimpson]

It is a clutch.

This will explain -

http://www.daviescraig.com.au/Fan_Cl...b-content.aspx

Nev

Like I said, the experts! I'd always thought it was simply a viscous clutch, like described in the answer to question 2. Must pay more attention to Matt's fan thread in future.

[KERRSURF]

It is.

A thermal clutch fan operates using silicon fluid as a viscous coupling medium