You may possibly have air in the system. Or your thermostat is not opening and closing properly. Double check that it was put on correctly. It wouldn't hurt to call a mechanic. From personal experience, I find I get better answers from neighborhood mechanics, than dealerships.
Waterpump, thermostat, radiator, radiator hoses.
There are many reasons why a Jeep Wrangler is overheating. A leak in the radiator system will cause overheating. Too much pressure in the engine can cause overheating. A bad water pump or thermostat could cause overheating. The transmission can also cause overheating if it is leaking.
follow the upper radiator hose from the radiator to the engine. When you get to the end of the hose, that is the thermostat housing. remove it and the thermostat will be in there.
If your truck is overheating!!! Then check the upper radiator and lower radiator hose's , if the lower is cooler the the upper the either the thermostat is not opening or the radiator is clogged
Blown head gastet, radiator leaking, thermostat needs to be replaced Blown head gastet, radiator leaking, thermostat needs to be replaced
Low on coolant, radiator fan inoperative, thermostat failed, water pump failed, radiator plugged
Low coolant, failed water pump, restricted radiator, inoperative radiator fan, thermostat,
the thermostat will be under the THERMOSTAT HOUSING, which is where the TOP radiator hose fits on ie(radiator to thermostat housing) this keeps the engine at an OPTIMUM temperature BUT can be A cause of OVERHEATING IF malfunctioning
low radiator fluid or a possible bad thermostat.
Check the fan clutch, it may not be working properly.
The top radiator hose is above the thermostat. If the top radiator hose is hot, the thermostat is opening. The thermostat is not the problem. Perhaps the radiator is clogged up or the water pump is bad. Look elsewhere.
The radiator may be plugged. Take it to a radiator shop.