their should be a fan in the front or the van attached to the raditor if that went bad that would cause it to get very hot beacse it isent sucking the hot air out of the motor or the exaust system isent blowing out
Although this could be very possible, I would also check the engine oil for signs of milkiness. If your oil looks somewhat like coffee with creamer in it ....... then it is very likely that your intake manifold gasket let loose and the coolant is mixing with the oil. If this is the case and you are not already to late, stop driving the van immediately ! The coolant in the oil will not only reduce the oils ability to lubricate the engine hence more friction and allot more HEAT but,, the combination of the coolant in the oil creates an acid that will eat at the surfaces of your engine.
absorb or release small amounts of heat, changing its temperature dramatically.
A lot of possible causes, I recommend a careful investigation.
Mumps causes salivary glands to swell dramatically.
It is possible it is one of the speed sensors.
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That is one of many possible causes.
Lack of sleep, weather conditions, time of day, night time driving. If this is a company then lack of breaks from driving, failure to follow DOT guidelines.
You need to have the system checked for codes to know possible causes.
If the temperature goes up and down and the coolant level is ok your thermostat is probably sticking. Replace the thermostat and you should solve the problem.
The maximum temperature that creates metamorphism is the temperature just below that which causes a rock to melt. Once a rock melts, then solidifies, it is considered an igneous rock.
Natural driving force causing ice to melt spontaneously at room temperature is the atmospheric pressure of nature.That and the fact that room temperature is well above freezing , one can put all the pressure one wants on ice , but until it rises above 0 deg. C , it will not melt. So temperature is the main factor , not pressure.
The lack of humidity and lack of cloud cover cause the extremes of temperature. There is no insulation to slow the absorbing of heat during the day and nothing to hold the heat at night. Therefore, the desert can be quite hot during the day but cool off dramatically at night.