In general the temperature should be more or less constant under any
condition, just slightly above the opening temperature of the
thermostat. If the temperature shows to be lower than the thermostat
opening temperature the thermostat is at fault or is the wrong type (it
should be of the sleeved type), assuming the heater is turned off. If
very cold, with the heater plus heater fan on maximum, the temperature
could drop below the opening temperature of the thermostat.
If the temperature increases significantly the cooling capacity is
insufficient because of blockages/dirt, faulty water pump or the wrong
radiator capacity.
Older cars can have insufficient cooling capacity at low speeds/engine
revs, hence the advise to fit a thermostatically controlled electric fan
when the car is used in modern traffic.
Kees Oudesluijs
Bob Spidell schreef op 14-10-2014 17:15:
> Cool :) FWIW, that's pretty much how my BJ8 behaves with a stock radiator and
> Texas Cooler fan. Are you running a stock BN1 fan?
>
> On a side note, does anyone know why our cars routinely run under the
> thermostat set point? For example, I have a 180degF thermostat in my BJ8, and
> on not-hot days on the freeway it may run around 160degF. Under warmer
> conditions with more of a load it'll hold 180 until stuck in traffic, etc.
> then goes up 10-20 degrees. The thermostat should stay closed until reaching
> the set point--e.g. 180--then open and maintain that temperature until the
> the radiator can no longer, well, radiate all the heat produced by the
> engine. Is it possible our engines are being air-cooled enough to stay under
> the thermostat set point under benign temp and load conditions?
>
> Bob
>
> ----- Original Message -----
>
>
>
> On Wednesday, October 1st I installed an all aluminum radiator in my BN1 100.
> On
> Saturday, October 4th I went on a 200 mile plus journey from the valley floor
> in
> northern California up to 8500 feet elevation at the summit of Mount
> Lassen and then back into the valley. The temperature in the valley
> was about 95 degrees F and going up in to the mountains, I got stuck
> behind a motor home and on a very twisty, steep, hot and slow road,
> that's where I got my hottest, a little under 200 degrees! The rest of
> the trip I ranged from 150 degrees to 190! I'm not even going to count
> the 120 I got coming down out of the mountains!
> All in all, it's the best thing I've ever done for my car. The
> radiator was made by Wizardo;? out of New York, I got it off of eBay and other
> than
> them sending me the wrong radiator to begin with, (which they did
> straighten out), I would highly recommend their work and product. NFI,
> just happy with what it's done to my car. Didn't have to change a
> thing in the car and it bolted right in! Sweet!
> Steven Kingsbury
> BN1 #598
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