Thread: inline Fuel Pump TD6

Originally Posted by RangieBit

Yes, Gav the main engine fan is a viscous unit.

That's an electrically operated unit that changes the viscosity of the fluid and acts just like a clutch to engage and disengage the fan. It's more than just a simple temp reactive fluid these days.

It relies on inputs from the engine ECU regarding air temp, engine temp, vehicle speed, engine speed and probably a whole bunch more inputs as well. It (ECU) then decides whether to trigger the fan clutch or not.

.....

I thought this was the case! There is thread on here stating the opposite…

Fan on mine runs for a couple mins on startup then drops off. Runs in slow heavy traffic or when its hot (makes sense) and runs whenever the AC is on no matter what engine temp is or ambient temp is – turn the AC off when all is cool and the fan drops out about 20 sec latter. There is too much going on for it to be simply temp related.

Maybe I need to follow up the fan Clutch fault that was present.

Grover, get a couple of small clamps. Once you can get under the car, it's a simple 5 min job but I found I needed new hose clamps, which I didn't have. Took me longer to go get clamps than I spent working on the car.