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did you replace radiator hoses i have seen hoses collapse and cause overheating while driving and radiator could be clogged. also did you bleed your cooling system according to owners manual
it is both kinetic and potential energy
Gravity.
Engine is in need of tuning.
its getting ready to explode. jump out quick
Time for a tune up.
With a forklift, carry the load on the uphill side.
It depends how high you're talking about. If you mean revving all the way to the red line then yes this is bad for the engine. But the rpm shouldn't exceed 4000 rpm. If it is slightly below this then it is fine.
The HOLD light indicates the driver has selected NOT to allow the car to shift into a higher gear (i.e., 5th gear -also called Overdrive). It is mostly used when driving uphill when the driver wants to prevent the car from shifting into a gear that is too high and possibly could cause the engine to lug (over-strain).
The amount of load it is hauling, whether inside or like pulling a trailer. Also using the air conditioning while going up very long grades on the roadway will cause overheating as the engine has to work harder going uphill and adding the drag of the air conditioning pump only makes that more difficult.
You're driving an automatic, the car should select the correct gear for you. However some automatics allow the driver to select low gears for use in slow moving traffic for example. If you feel you need more power when driving uphill then select one of the lower gears.
because it is going uphill and the engine has to work harder?