Running Temp's in Cold Weather
Discussion
But that's the right answer.)Cheers Peter. I had checked with a couple of friends with a variety of TVR's and some were experiencing this and some were not.
My ol' S never got quite this cold and as I use the car all year round I just wanted to make sure ...
Baffling the radiator is dodgy as the car gets used in the city a lot ...
>> Edited by johno on Monday 23 December 11:29
My ol' S never got quite this cold and as I use the car all year round I just wanted to make sure ...
Baffling the radiator is dodgy as the car gets used in the city a lot ...
>> Edited by johno on Monday 23 December 11:29
johno said: Cheers Peter. I had checked with a couple of friends with a variety of TVR's and some were experiencing this and some were not.
My ol' S never got quite this cold and as I use the car all year round I just wanted to make sure ...
Baffling the radiator is dodgy as the car gets used in the city a lot ...
>> Edited by johno on Monday 23 December 11:29
This time of the year you only need a fraction of the radiator area and air flow to keep the engine cool. Blocking off half the radiator or half the front grill will make very little difference to the 'stationary' temperature but will help keep it warm when you're on the move. (Given a choice, block the grill rather than the rad, as this makes most difference when you're moving and least difference when you're stationary. But it doesn't matter that much.)
Wow 55 that is cold. Is that enough for the thermostat to even open? Over the last few weeks I've seen the temp slowly climb up to operating temp, then the stat opens - hot water goes in to the rads and any damp/condensation starts steaming off. Very disconcerting and gives much amusement to others on the roads; they seem to think I'm about to boil out 
On motorways I see about 75ish, quickly up to 90 in traffic and the fans kick in.
On motorways I see about 75ish, quickly up to 90 in traffic and the fans kick in.
It was a particularly cold night. Air temp was around freezing and it was a 50 mile (100mph) single run. But 55 was registered.
As with others as soon as I get stuck in traffic for longer periods I hit 90, but even in London at the moment it takes a while to get there. I am finding at the moment that it tends to get to 80 and then the fans come on, the air is so cold that the temp drops to 75 pretty quickly ...
As with others as soon as I get stuck in traffic for longer periods I hit 90, but even in London at the moment it takes a while to get there. I am finding at the moment that it tends to get to 80 and then the fans come on, the air is so cold that the temp drops to 75 pretty quickly ...
johno said: As with others as soon as I get stuck in traffic for longer periods I hit 90, but even in London at the moment it takes a while to get there. I am finding at the moment that it tends to get to 80 and then the fans come on, the air is so cold that the temp drops to 75 pretty quickly ...
My fans seem to come on at 80 from a cold start, then settle down to the usual on at 90 routine. Is there a reason why they kick in earlier from start?
donatien said:
My fans seem to come on at 80 from a cold start, then settle down to the usual on at 90 routine. Is there a reason why they kick in earlier from start?
Heard/saw this somewhere on here once that if the airflow under the bonnet is cold and passes where the Temp sensor is then obviuosly you reading on the Temp Gauge could read lower than the actual REAL engine Tempature.Thus looking lower on the guage when your fans cut in.
Dont know how true that is but it does kinda make sense to me.
BB
Heard/saw this somewhere on here once that if the airflow under the bonnet is cold and passes where the Temp sensor is then obviuosly you reading on the Temp Gauge could read lower than the actual REAL engine Tempature.Thus looking lower on the guage when your fans cut in.
Dont know how true that is but it does kinda make sense to me.
BB
That makes some sense but why? Is it lag on the temp sensor catching up? The otter switch doesn't "know" it's coming off cold so I can't explain it. Given that it all gets hot down there shouldn't be much of a difference.
Heard/saw this somewhere on here once that if the airflow under the bonnet is cold and passes where the Temp sensor is then obviuosly you reading on the Temp Gauge could read lower than the actual REAL engine Tempature.Thus looking lower on the guage when your fans cut in.
Dont know how true that is but it does kinda make sense to me.
It would if there wasn't a whole load of ignition/air con stuff shielding the temp sensor from the direct air flow. The sensor bit is also fairly deep into the engine. I'm sure there is some effect but not that much. The air also gets got hot when it passes over the manifold.
Only just been serviced and no problems reported. It is not running any different to the day I bought it.
When I ran it down to Auxerre it ran 60 degrees all the way down. Air temp is now significantly lower and therefor the lower running temp. Generally it doesn't get below 60.
If the thermostat din't open it would take an age to warm up. Thats not the case either.
Have a good Christmas Paul. Maybe a run on Boxing Day to clea the cobwebs ?
When I ran it down to Auxerre it ran 60 degrees all the way down. Air temp is now significantly lower and therefor the lower running temp. Generally it doesn't get below 60.
If the thermostat din't open it would take an age to warm up. Thats not the case either.
Have a good Christmas Paul. Maybe a run on Boxing Day to clea the cobwebs ?
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