When a car is coasting down a long slope it does not burn much
fuel/generates much heat. Certainly not enough to keep up the
temperature so after a while the whole system/engine starts to cool down
as the heat dissipated to the environment is more than the heat
generated from combustion.
Kees Oudesluijs
Bob Spidell schreef op 15-10-2014 16:48:
> Also, on a warm day when I shut down the temp will go to exactly
> 212degF (100degC), which gives me more confidence the gauge is correct
> (what my dad calls 'latent heat' causes the coolant to go the boiling
> point).
>
> Bob
>
>
> On 10/15/2014 7:34 AM, Bob Spidell wrote:
>> My gauge was recently refurbished and calibrated by West Valley
>> Instruments (the former 'Mo' in MoMa), so I'm reasonably confident
>> it's accurate. My temp will stay below the thermostat set point
>> (180degF) on a cool day. Coasting down a hill, it often gets below
>> 160. Driving along steady on a mild day it will stay at 180
>> (expected), then exceed that on a hot day pulling a load or sitting
>> in traffic. My heater is usually off--but the valve on the block is
>> open year-round--and I've used it as an 'auxiliary radiator' when it
>> gets close to 212deg.
>>
>> So, assuming the gauge is correct, why is my temp often below 180
>> (Kees?). The only explanation I can think of is that the engine is
>> sufficiently air-cooled in benign conditions to keep the thermostat
>> closed. I've tried several thermostats with same result, and have
>> tested a couple on the stove in hot water. Apparently, others are
>> experiencing the same phenomenon.
>>
>> Bob
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