viscous fan,

96terrano · 11-09-2012, 17:43

i'm fitting another 12" fan to my trucks rad, i already have a 9" AC fan off a SE. ive been told that i should remove the viscose because it's a bhp waster, but my thoughts are it cools the engine when idling. and it gives a dominating roar

my 9" and 12" are running though a switch on the dash
WHAT'T YOUR THOUGHTS????

cncfabs · 11-09-2012, 18:03

Quote:

Originally Posted by 96terrano

i'm fitting another 12" fan to my trucks rad, i already have a 9" AC fan off a SE. ive been told that i should remove the viscose because it's a bhp waster, but my thoughts are it cools the engine when idling. and it gives a dominating roar

my 9" and 12" are running though a switch on the dash
WHAT'T YOUR THOUGHTS????

Leave it be

96terrano · 11-09-2012, 18:32

Quote:

Originally Posted by cncfabs

Leave it be

Fair enough, I just wanted an opinion

Lazy-Ferret · 11-09-2012, 18:35

If you are not taking out the viscous fan, then I can not see the point of putting in a second electric fan. It's just something else in front of the radiator to slow the air flow down.

The only reasons to fit an electric fan are

you are in vehicle with a light weight engine and need a few extra BHP that the fixed fan nicks... Not the case in a Terrano

You don't like the gratifying roar of the fan, and want to sound like a washing machine when the car is hot instead.

You tow, and turning the electric fan on a bit earlier helps stop the engine getting hot, but since the Terrano seems more than capable of coping with what ever you stick on the back, no need.

You spend a lot of time parked up in queues on the M25, not moving, but again, the Terrano seems to have no problem cooling it's self

Your Viscus fan has died, and you already have an electric fan knocking around in the garage, so it is easier and cheaper to fit that, than go looking for a replacement viscus one.

Remember when hardly moving the alternator is not putting out the maximum power, so it is easy to run the battery down when using it at slow speeds, especially if you have a second fan as well. Then you turn on the internal fans, maybe your lights, and try to open the windows, but the battery is flat. Engines that run too cool actually use more fuel as well.

So in a nut shell.. seems like a bad idea...

96terrano · 11-09-2012, 18:44

Ok,

but my truck gets hot when towing up a long hill with over a ton of tintent, why's that, dads driving

(RIP) PLANK · 11-09-2012, 18:48

Quote:

Originally Posted by 96terrano

Ok,

but my truck gets hot when towing up a long hill with over a ton of tintent, why's that, dads driving

I have owned a fair few T2's and towed some pretty big stuff with all of them, I have never had an issue with the original fan unless there have been water pump problems as the viscous coupling is part of the pump

96terrano · 11-09-2012, 18:52

Quote:

Originally Posted by PLANK

I have owned a fair few T2's and towed some pretty big stuff with all of them, I have never had an issue with the original fan unless there have been water pump problems as the viscous coupling is part of the pump

Strange tbh, maybe it's the water pump, but that shouldn't cause over heating, my truck on normal driving sits at about quarter on the temp gauge, but when towing up hill it'll go over half and even three quarters, but if the heater is turned on it'll cool off, is it because the heater matrix is buggered?

makeitfit · 11-09-2012, 18:58

I know what your problem is

Bin the tin tent

Oh and after that, check your thermostat

96terrano · 11-09-2012, 19:37

Quote:

Originally Posted by makeitfit

I know what your problem is

Bin the tin tent

Oh and after that, check your thermostat

what and go away in a

hotel? no thank you

stat is fine, i get the right ohms

cncfabs · 11-09-2012, 19:40

Quote:

Originally Posted by 96terrano

Strange tbh, maybe it's the water pump, but that shouldn't cause over heating, my truck on normal driving sits at about quarter on the temp gauge, but when towing up hill it'll go over half and even three quarters, but if the heater is turned on it'll cool off, is it because the heater matrix is buggered?

Turning heater on aids cooling as its an extra radiator.Have you got the correct amount of aintifreeze in as that will make a huge difference compared with just water.

96terrano · 11-09-2012, 19:48

Quote:

Originally Posted by cncfabs

Turning heater on aids cooling as its an extra radiator.Have you got the correct amount of aintifreeze in as that will make a huge difference compared with just water.

yes, i have 50% water, 50% anti freeze

(RIP) PLANK · 11-09-2012, 20:24

ohms? stat? confused

briggie · 11-09-2012, 20:28

Quote:

Originally Posted by PLANK

ohms? stat? confused

i suspect he is refering to the resistance reading he is getting from his meter when checking the stat

briggie · 11-09-2012, 20:30

or perhaps he should be checking the temp sensor instead

as far as im aware the stat has no electrical connections

(RIP) PLANK · 11-09-2012, 20:41

Quote:

Originally Posted by briggie

or perhaps he should be checking the temp sensor instead

as far as im aware the stat has no electrical connections

that's what I thought the stat is a normal wax and a spring job immersed in the coolant, or was last time I changed one

http://www.ebay.co.uk/sch/i.html?_tr...ostat&_sacat=0

11-09-2012, 17:43	#1
96terrano Senior Member Join Date: Jun 2010 Location: Dumfries and Galloway, Scotland Vehicle: Nissan Terrano 2.7TD LWB Posts: 8,024	viscous fan, i'm fitting another 12" fan to my trucks rad, i already have a 9" AC fan off a SE. ive been told that i should remove the viscose because it's a bhp waster, but my thoughts are it cools the engine when idling. and it gives a dominating roar my 9" and 12" are running though a switch on the dash WHAT'T YOUR THOUGHTS????

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11-09-2012, 18:35	#4
Lazy-Ferret Senior Member Join Date: Jun 2012 Location: Sevenoaks, Kent Vehicle: Terrano 2.7TDi SE Touring Posts: 5,221	If you are not taking out the viscous fan, then I can not see the point of putting in a second electric fan. It's just something else in front of the radiator to slow the air flow down. The only reasons to fit an electric fan are you are in vehicle with a light weight engine and need a few extra BHP that the fixed fan nicks... Not the case in a Terrano You don't like the gratifying roar of the fan, and want to sound like a washing machine when the car is hot instead. You tow, and turning the electric fan on a bit earlier helps stop the engine getting hot, but since the Terrano seems more than capable of coping with what ever you stick on the back, no need. You spend a lot of time parked up in queues on the M25, not moving, but again, the Terrano seems to have no problem cooling it's self Your Viscus fan has died, and you already have an electric fan knocking around in the garage, so it is easier and cheaper to fit that, than go looking for a replacement viscus one. Remember when hardly moving the alternator is not putting out the maximum power, so it is easy to run the battery down when using it at slow speeds, especially if you have a second fan as well. Then you turn on the internal fans, maybe your lights, and try to open the windows, but the battery is flat. Engines that run too cool actually use more fuel as well. So in a nut shell.. seems like a bad idea...

11-09-2012, 18:44	#5
96terrano Senior Member Join Date: Jun 2010 Location: Dumfries and Galloway, Scotland Vehicle: Nissan Terrano 2.7TD LWB Posts: 8,024	Ok, but my truck gets hot when towing up a long hill with over a ton of tintent, why's that, dads driving

11-09-2012, 18:58	#8
makeitfit Senior Member Join Date: Apr 2008 Location: on the beach WEST WALES Vehicle: Maverick TDi BLACK mmm Posts: 15,136	I know what your problem is Bin the tin tent Oh and after that, check your thermostat

11-09-2012, 20:24	#12
(RIP) PLANK Senior Member Join Date: Mar 2006 Location: Central England, in the Heart of the Black Country Vehicle: T2 2004 TDI SE LWB Posts: 7,740	ohms? stat? confused

11-09-2012, 20:30	#14
briggie Senior Member Join Date: Mar 2010 Location: peoples democratic republic of west yorkshire Vehicle: " alice " Posts: 10,473	or perhaps he should be checking the temp sensor instead as far as im aware the stat has no electrical connections