What size engine? Are you losing coolant(this may be internal or external)? Is your oil level rising? This is critical to anwer these questions. The 3.1 (if you have it)motor can be tricky. 2 common problems are intake manifold gasket and the water pump. When the water pump leaks on these, it can be difficult to verify. Look for dried coolant spray on the hood or on the passenger side of the radiator in relation to the water pump. Also look for a rusted flat surfaced pulley of the water pump, or try to check for moisture on the inside the pulley-easier said than done.
You may havt bleed off the air that is in the cooling system. Their is a bledder just above the #2 spark plug ( it is a very small bolt that turns ccwise) I t is connected to a solid blck tube that runs horizontily above the front valve cover and connects to the block. Good Luck
Bad thermostat maybe?
The radiator may be plugged. Take it to a radiator shop.
i have replace the thermostat, checked the fans,filled with water and it is still overheating. Very often, the waterpump leaks and stops working only years after it was last replaced. Coolant is probably not flowing from the engine to the radiator to be cooled.
If you have an old ISUZU Trooper, the radiator thermostat may be not working. Therefore, it will not let cool water from the radiator into the hot engine, even if the radiator is full. Have the thermostat checked and replaced, if necessary. Good Luck
Not sure if these have one but it could be a bad thermostat.
If you replaced some of theses already ignore and go down the line # Not enough coolant # Water pump drivebelt defective or out of adjustment # Radiator core blocked or grille restricted # Thermostat faulty # Electric cooling fans blades broken or cracked # Radiator cap not maintaining proper pressure # Ignition timing incorrect
Get your radiator checked, may have blocked core
2 things I can think of which need to be checked: your coolant and your thermostat.
first of all, do you have the right thermostat? ie: winter, summer. if so i would get the radiator checked, it may be getting pluged.
This question is not complete. . Need to know if you've replaced radiator, thermostat, hoses etc. Are you asking this question *after* yo checked the thermostat, changed, added or drained the system?
If it is not losing coolant I would expect a plugged radiator.
have you checked the fan