NEW fan , temp gauge and bits

[Simon.O.]

As I have posted before the new fan controller is in and running now.
I had to replace the thermo fan switch in the t-stat housing. It is now a 92 degree one. I am not sure what the old one was but I do know that it was kaput!
The toyota gauge does its normal thing that we are all used to .
Start........warm............. 1/2 way......sleep all day!

The new one is a Trisco Imperial one, so I had to decipher what deg F was into deg C.

IT MOVES

Driving around you can see the changes in temp as the T-stat does its job,
If I boot it up the hill it moves up a little then the Viscous fan does its bit.
I have not yet had the Thermo fan come on while driving, which brings me to the next funny thing

I gave the Ghost a bit of welly the other day to test my new fan on the way up to Mums place, after letting it run down on the turbo timer for 3 mins it turned off.

I was inside for about 5 minutes and when I came out and went to restart it the thermo fan came on as well and my swizzy new audible alarm.
Within a minute it reset and all was good.

My only theory is that as it was all very warm under the lid the T-stat housing got a bit of "heat soak" while the engine was off, because as we all know even at idle the Viscous fan throws a bit of a draught over the whole thing.

Hmmmm sounds like a good enough excuse for a bonnet scoop....I' have to convince HER though!!

Anyway enough waffling for now
Cheers and Beers
Simon.

[Vagrant No2]

After the engine has stopped the coolant no longer ciculates the water pump is no longer turning . As heat rises , the hot coolant rise to the top of the engine . When you re start the engine the cooling fan sensor will turn the fan on as the rise in coolant temp has switched it on . Many modern cars with electric coolant fans do this .
Some Renaults have a timer on the engine connected to an electric water pump fitted in the bottom rad hose , so when the engine is stopped the coolant is circulated for 5 minutes . This was done to stop the cylider heads from warping and head gasket failure as this was a common fault found on some models due to coolant temp rising when engine stopped . These electric pumps and timers are available as kits for cars , but I have not seen an advert recently .
The electric pumps would also be good for the modded off roaders with rear mounted rads to help with the flow of coolant to the rear , as the increased coolant and length of pipe runs to the rear are an increased effort on the standard block mounted water pump .


Rick

[TonyN]

Yeah, on my V8, the fans were live all the time, they would come on 2-3 mins after stopping, then run for 5 mins, then go off, then come on again 5 mins after again for a couple of minutes.

quite annoying late at night! But normal.

[BUSHWHACKER]

Hi Simon,
I've just been reading your post, very impressed!
Regarding the bonnet vent idea, I fitted two small, rear facing vents from a " boy racer" car over here called a Vauxhall Astra G.S.I. they took a lot of measuring before I had the guts to cut holes in the bonnet, but once fitted, they work fantastic!!
After a run in the truck I can feel the engine heat gushing out through the vents.
Also because they are rear facing, as you drive airflow goes in through the front and out through the vents.
N.B. I fitted one vent above the turbo, the other, same place on the other side. See pic.
cheers ,Vince.

[marky]

You'll save on DE-ICER in the winter LOL

[BUSHWHACKER]

You'll save on DE-ICER in the winter LOL

That's me, always thinking ahead!

[marky]

Its a good idea as there is a lot of heat produced under the bonnet,
REAR FACING is the correct way as it lets the heat out. Front Facing wont warrant any benefits.

[BUSHWHACKER]

Its a good idea as there is a lot of heat produced under the bonnet,
REAR FACING is the correct way as it lets the heat out. Front Facing wont warrant any benefits.

See previous post!
cheerz, Vince.