cooling fans/running temp

[Littletidnock]

I suspect this has been asked many times, for which I apologise.

Chimaera 400 serpentine ally rad 47,000 miles,

On clear roads and normal road speeds the gauge sits at around 75 as I come into stationary traffic the gauge creeps up past 90 to 100, both the fans cut in, the temp drops slightly, then the fans cut out, back up to 100, fans cut in and so on. Apart from a heat haze raising from the bonnet vents there are no signs of boiling and the heater remains hot.

In short do you think this is normal, if there was an overheating issue would the fans stay on permanently.

your help would be appreciated.

[jim.2007]

I'm a new owner but i have got tuscan fans fitted,mine cut in and out constantly around 85 degrees,and as for hot air,mine gets very warm inside the cabin and this is a common thing i think, as researching the car before buying this was generally known, i hope more experienced owners can shed some light on getting some cool air into the cabin??

[Littletidnock]

Thank you.

When I say the heater remains hot, I did not mean it is on constsntantly or the heater is faulty. I mentioned it because a heater which is set on the hot setting however blowing cold air can be a sign of boiling, perhaps worth knowing

[jim.2007]

cheers for that will bear that in mind,the thing with mine is there is coolish air coming from the fan but with the heat from the engine and tunnel it does get very warm inside is this the same for you?

[Ubernoober]

Yup,70 - 75 running 90 - 100 stationary in traffic seems normal to me if you haven't got the two-stage fan kit installed.


You get more cool air into the cabin by taking the roof off!

Edited by Ubernoober on Thursday 19th June 19:07

[jim.2007]

but when it's a baking day it seems to be worse as you have heat from engine etc and the sun banging down on my bald head, plus very poor pressure from the fan to cool you down!sometimes get out 3 pounds lighter..

[blueyonder]

Littletidnock said:

I suspect this has been asked many times, for which I apologise.

Chimaera 400 serpentine ally rad 47,000 miles,

On clear roads and normal road speeds the gauge sits at around 75 as I come into stationary traffic the gauge creeps up past 90 to 100, both the fans cut in, the temp drops slightly, then the fans cut out, back up to 100, fans cut in and so on. Apart from a heat haze raising from the bonnet vents there are no signs of boiling and the heater remains hot.

In short do you think this is normal, if there was an overheating issue would the fans stay on permanently.

your help would be appreciated.

That's what mine does and that's with a recently recored radiator and a new temp sender....so reckon it's normal! Behaved on the run to Le Mans and back too.

[Ribol]

Ubernoober said:

You get more cool air into the cabin by taking the roof off!

It doesn't work like that, taking the roof off lets the hot air out

[Ribol]

jim.2007 said:

but when it's a baking day it seems to be worse as you have heat from engine etc and the sun banging down on my bald head, plus very poor pressure from the fan to cool you down!sometimes get out 3 pounds lighter..

Try being stuck in slow stop/start Milan traffic for over an hour on one of the hottest/humid days that summer with the boot full of luggage, the heater on hot with the fan on full blast in a desperate bid to stop the engine overheating!!

My single worst TVR experience and not one I would like to repeat

[s5tuart]

My "secret" is to not be tempted to move the heat dial to hot when you first start the car, even if it is a bit chilly. I find that once the dial has been on the HOT side the blower does take eons to cool.
Of course there may be some problem with the adjustment of the cabling on yours. If it blows hot ALL the time you may need to get the dash off and make some sdjustments to the cable. HTH

[chrispitman]

I wouldn't rely on the dash gauge, just fitted an emerald after market ecu and the engine coolant temp sensor reads 70-80 Deg general running and the dash reads 60-70 Deg then at Engine 100 Degrees the gauge is about 100Deg again.

Get your self a laser Temp Device and do a check.

[m4rk]

I thought TVR frigged the cabin gauge to read lower than the actual temp to stop breakdowns of the nervous type

That's what the resistor is for isn't it.

I have a couple of temperature gauges of the type that lie over hot pipes. Usually used for central heating systems. I wonder if the would work for my tiv too

Might be useful for setting up modwise kit

edited to add:

Actually maybe its not such a mad idea. I can fit a gauge to both the input and output of the radiator, I have two of them. I could then tell how efficient it is; for future reference.

Edited by m4rk on Friday 20th June 10:45