Second cooling fan

Philip Chidlow · Post by **Philip Chidlow** » Sun Jan 07, 2007 12:27 pm

Is it straightforward to fit one? I understand that it is recommended on 1.9 diesels if the car will be towing. How easy/difficult are they to get hold of? Or is it a case of removing the single and replacing with a double unit?

Stewart (oily!) · Post by **Stewart (oily!)** » Sun Jan 07, 2007 12:47 pm

The mounting holes are there, you just need another standard BX fan, its a long time ago now but I seem to remember moving the original fan sideways into another set of mounting holes and the second one goes into a second set of holes, does that make any sense

Stewart

Kitch · Post by **Kitch** » Sun Jan 07, 2007 1:17 pm

Easiest way to fit one is to find the cowling with twin fans already fitted. Just bolt the whole thing in basically.

That said, I towed an illegally heavy trailer with the 19RD up lots of hills and it didn't even get warm. I doubt you'd really need one.

tom · Post by **tom** » Sun Jan 07, 2007 4:58 pm

On the hottest day in Death Valley? No, Philip, fit one if towing above 650 Kg. I think I have the necessary resistor lying around.

Kitch · Post by **Kitch** » Sun Jan 07, 2007 5:31 pm

Not Death Valley, it was from Timsbury onto the M27 and up to Guildford. We got pulled over there we could get any further though.

Wasn't a hot day either, this is Britain

We did remove the grille though, just to derestrict it a bit

Philip Chidlow · Post by **Philip Chidlow** » Sun Jan 07, 2007 5:38 pm

I am contemplating towing a trailer/trailer tent or even four-berth caravan (

) next summer so I'd like to be sure - especially as we are having hot summers and there's no temp guage as such! A trip to my friendly neighbourhood Citroen breakers in the Spring, I think.

Ian_Fearn · Post by **Ian_Fearn** » Sun Jan 07, 2007 5:40 pm

Its a good idea to install a temp gauge too Phil.

Philip Chidlow · Post by **Philip Chidlow** » Sun Jan 07, 2007 5:43 pm

There's a thread about that isn't there?

Ian_Fearn · Post by **Ian_Fearn** » Sun Jan 07, 2007 5:58 pm

Yes, there is, but there isnt a thread that tells you exactly what part you need from Citroen.

I bought a sender from GSF which then fried the gauge i fitted in the dash. Have got another gauge (from Cavmad) and am going to order what i believe to be the correct sender tommorrow from Citroen, part number: 0000133772 £10.63

Philip Chidlow · Post by **Philip Chidlow** » Sun Jan 07, 2007 6:04 pm

Thanks for the info. It may seem an odd question, but what form does the guage take? Is it an additional dial fitted to the dash somewhere?

Ian_Fearn · Post by **Ian_Fearn** » Sun Jan 07, 2007 6:07 pm

No, its the one that you would normally see in a standard GTi pod but fitted into the diesel pod.

Philip Chidlow · Post by **Philip Chidlow** » Sun Jan 07, 2007 6:09 pm

Any chance of a pic?

Ian_Fearn · Post by **Ian_Fearn** » Sun Jan 07, 2007 6:15 pm

pm me your email address

jeremy · Post by **jeremy** » Sun Jan 07, 2007 6:30 pm

Over about 25 MPH fans will provide less airflow through the radiator than the forward motion of the car does.

There is nothing worse than being stuck in traffic wishing you had done the fan conversion - so its probably worth doing.

Haynes shows the correct wiring for an additional fan. The idea is that on slow speed they are in series - so that each motor functions as a resistor for the other - and for fast - they are switched to parallel - so each gets full power.

Interestingly our ZX 1.9D which has a towbar, probably fitted new has 2 fans and an oil cooler.

Automatics have an additional oil cooler on the gearbox and I think must have the additional fan.

If you are really worried - you need an enormous radiator like the huge one fitted to the Turbo-diesels.

Your car may already have the oil cooler - its the cylindrical thing with 2 hoses going into it mounted under the oil filter element.

On the other hand you can always rely on the good old standby of turning the heater on hot and running its fan on full. The heater is equivalent to a moderate sized radiator in its own right and you may find in cold weather that this is all the cooling that the car requires - ie temperature gauge doesn't reach 80 and the heater is warm! I know the ZX does this often on frosty mornings.

Mike E (uk) · Post by **Mike E (uk)** » Sun Jan 07, 2007 11:47 pm

Easiest way to power extra fan is to wire the new fan in parallel with existing fan, then simply wire another dropper resistor in parallel with the existing resistor.

Same effect as the series/parallel switching, but far easier to fit.

Mike