If you have the correct weight oil in the engine, it sounds like the engine may be worn. If you haven't checked the oil pressure with a manual gauge (vs the dash gauge) that is a good place to start to verify that it is not a gauge/sensor problem.
You will need to remove your oil pressure sending unit and install a mechanical gauge to get a true reading. You need to start out cold and write down the pressure reading and also once it warms up to operating temperature. If the pressure gauge is not the same as the mechanical one you have a bad pressure switch.
Hot or cold?
If you get too hot then you sweat which cools you down, if you get too cold then you shiver which warms you up.
because it needs to cool down if it gets too hot
Pressure. The further you are down, the colder it gets. For example, when you spray yourself with deodorant, its cold. This is because it is under pressure in a can. But yes, the further you go down, the more pressure, the colder it gets.
bob is the best
When the oil is cold, it will register a high pressure. As it warms, it will go down. Check your oil level with the dipstick to be sure oil is to the full mark. Also, if oil is old, and thin, change it. It has lost its viscosity. The needle should stay in the "safe" zone, even at idle.
Hotter weather typically causes atmospheric pressure to go down. As air warms, it expands and becomes less dense, leading to lower pressure in the vicinity. This is why high-pressure systems are often associated with cooler, denser air, while low-pressure systems are linked to warmer, rising air.
Ice causes the pressure in soda to go down because it cools and contracts the gas inside the container, reducing the pressure. This can lead to less gas being dissolved in the soda, which can result in fewer bubbles when the soda warms up again.
Here is the address to the International Full-Size Jeep Association website: http://www.ifsja.org/index.shtml Plenty of info, know how, etc.
front pump or clutches more than likely its the clutches
When a hot can is placed in cold water, the air inside the can cools down and contracts, creating a lower pressure inside the can. The higher pressure outside the can then crushes it.