you need to check coolant while the truck is cold. This willstop the cap from flying off and coolant from spewing everywhere. Check to make sure the coolant is full, your thermostat could probably be replaced very cheap and easy. Also its probably a good time to check your hoses to make sure they are in good shape. If none of this works make sure that your water pump isn't leaking and that its working.
I believe the 1990 year still had the sealed system. So there is no rad cap. You can add fluid by pourig it into the overflow bottle with the vehicle running the coolant will be sucked into the system. No radiator cap exist in the 90, 91 model. You add the coolant to the coolant container (The coolant container cap is the equivalent of the radiator cap, (pressure device))and the palstic container is under pressure all the time. Be carefull when you want to open it after the car has been running. After those year models, Jeep discontinued the use of the pressure container and went back to tha radiator cap and remove the pressure coolant container.
No. When the engine is running coolant is heated and expands. Excess coolant then flows from the radiator to the expansion (overflow) tank. When the engine is shut down coolant cools and contracts drawing fluid back out of the tank to keep the radiator topped off.
NO! That would be dangerous. Cars' coolant systems are pressurized, so if you open the radiator cap while the engine is running, it will spray HOT radiator fluid (water mixed with ethylene glycol, usually) all over you, and sometimes drain the radiator of coolant.
Radiator fan inoperative, thermostat stuck closed, coolant low, radiator restriction, etc.
You should see the coolant circulating in the radiator when the car is running
The radiator is located in the front of the car, where it is located in most cars. There are coolant pipes running beneath the car, under protective covers, that feed coolant to and from the radiator. There are three drain plugs on the car, and it is a complicated system to flush.
your radiator clogged up.cheaper to get a new radiator. nothing to do with the radiator cap.
Because the motor is running to hot try flushing your radiator and putting new coolant in.
is coolant leaking from engine?or is it leaking from water pump and running down engine and appears to leak from engine
Theres a leak. Probably a hose but could be radiator or heater core, water pump or engine core plug
The engine coolant fan can keep running after the engine is turned off in any car because the temperature gauge is in the radiator. As long as the radiator is still hot, the fan will keep running until the temperature gauge says it has cooled enough.
In cars and trucks the radiator is up front to get air before it can get heated by the engine.