engine cooling

[retrogarage]

Hi All,
.
Can anyone please advise me on an electric fan conversion for my Terrano R20 tdi 2.7?
Any system that you can recommend? Struggling under heavy load in 35c temps.

 

[terranosaurusdoug]

Hi All,
.
Can anyone please advise me on an electric fan conversion for my Terrano R20 tdi 2.7?
Any system that you can recommend? Struggling under heavy load in 35c temps.

I think a member on here called madmark did that, it's worth a search

 

[solarman216]

If your Viscous fan cannot cope, then I would suspect your rad is clogged, if your fan is working then adding an electric one will make little difference, Rick

 

[Banshee]

Hi All,
.
Can anyone please advise me on an electric fan conversion for my Terrano R20 tdi 2.7?
Any system that you can recommend? Struggling under heavy load in 35c temps.

I have an original Nissan radiator cooling fan if you are interested. You'll have to get creative with a switch and wiring though. I'd get a manual switch on or near the speedo cowling that allows you to manually control it when needed

 

[makeitfit]

I had twin electric fans on mine for a while. Works fine IF you have a dual temp sensor . Otherwise if the engine starts to get hot the fans cant get the temp down soon enough.
I'd say stick to the viscous jobbie, assuming it's working properly.

 

[elty001]

I agree with Rick.
Once that viscous fan kicks in it soon cools things down.
Electric fans will never shift the same amount of air as the old viscous one.
I would be cleaning out the cooling system,radiator and fitting a new thermostat before I tried anything else :thumb2

 

[retrogarage]

Hi All,
Thanks for all your replies. Concensus seems to be to stick with viscous fan.
I've cleaned engine/radiator and replaced thermostat and all appears well. No sign of oil in water or vice versa. Its a high miler at 200k+ so I am wondering if the viscous fan is running as efficiently as it should. Fan seems to be runnig fine but is it time to fit a new coupling? How long are the clutches rated for?

 

[solarman216]

No it uses a viscous fluid, (Silicon grease) what fails is the bi metal spring cannot turn the internal valve because the shaft is seized, or they loose the fluid, if when you first startup and give it some revs say 3k it should roar for a few mins, if not it is bad, again if it roars OK after startup then you need to listen for it when the temp gauge starts to climb, it can be heard even at 60 mph and my hearing id bad, you cannot change just the coupling on the 2.7 it is new water pump, worth trying to free off the pin in the center first, Rick

 

[Goatmaster]

The way to test a viscous can is by what is commonly referred to as the carrot test, although you do not actually use a carrot.
At just after the initial inertia of startup and for a while afterwards, before the viscous coupling warms up you should be as to stop the can with your finger or ��. However don't try. Take a sheet of newspaper and fold it down to about 1x6 inches or thereabouts. Introduce that into the fan at a slight angle to the rear of the direction of rotation. Whilst still coming up to temperature this should stop the fan's rotation fairly easily. If the paper gets shredded the the viscous coupling is no longer viscous but has gone hard. The car will stay cool as it should but engine power is lost to the fan and there will be more wear on belt p
, pump etc. Now wait for the engine to warm up or come close to running temp. Try the test again and now you should get full on confetti.