Cooling system Solution for overheating

Hi. Do you own an infrared thermometer? This is a great tool to have for this type of failure. Keep in mind that one of your new parts may be defective. Just because its new, doesn't mean its ok. Before you started replacing parts. How was the antifreeze? Was there any rust? Coolant should be flushed every 3-5 yrs. if not, passage ways can become restricted or clogged. Now a flush isn't good enough and the engine needs to be chemically descaled. How is the cabin heat (is the heater core working well)? If your engine runs cooler at night and the ambient temperature does affect your engine. I would start by looking at the A/C condenser. Is there something preventing air flow? You can feel and squeeze hoses. You are feeling for thin wall thickness. Hoses can fail internally, collapse and cause a restrictions. With an infrared thermometer you can point at different areas of the engine block, heads, and related cooling system components. While the engine is running, monitor coolant temperatures, thermostat and fan clutch functions and circulation through the engine, heater core and radiator. Your car has a fan clutch and an electric fan. The fan clutch is for the engine cooling system. The electric fan is for the A/C. If the electric fan is coming on as designed and it isn't helping to cool the radiator. You are probably going to find that you have a circulation problem. The fan clutch is not going to operate if the radiator doesn't get hot enough. Please write back with any questions. Good Luck.

The radiator is most likely plugged. Flushing is the least expensive way to try to fix the problem. It may not clear a severely plugged radiator. Watch the lower radiator hose with the engine running. Accelerate the engine. If the hose tries to collapse, then the radiator is definitely plugged.

Never use a used radiator... check electric cooling fan, and air must be purged out of the radiator / cooling system after refilling it, this can be a little difficult. are you sure that it is not leaking coolant from somewhere else, which would cause the overheating.?

Three additional things that can cause overheating - a restricted exhaust system, a weak fan clutch, and restrictions in the cooling system in the block or hoses. Any chance you might have air in the cooling system ?

There are any number of things which can cause/contribute to an engine overheating. Some of them:
1. Thermostat stuck closed
2. Restriction/clog in the system (hoses, radiator)
3. Blown headgasket
4. Cracked head/block
5. Water pump not pumping
6. Water pump pully/belt
7. Cooling fan not fanning/turning
8. Restricted airflow through radiator vanes

Have a qualified/certified Hyundai Service Technician properly diagnose this issue

Clutch Fan are known to fail over time, but I wold not rule out the radiator. The small passages inside the radiator will clog due to age. You did not mention how many miles are on the Jeep or if the Aux fan is kicking on.

Remove or disconnect the following:

Air outlet duct Coolant Inlet radiator hose from the water pump Upper fan shroud Cooling fan and clutch assembly Drive belt Radiator outlet hose from the coolant pump Surge tank hose Heater hose Water pump



DO NOT use cooling system seal tabs (or similar compounds) unless otherwise instructed. The use of cooling system seal tabs (or similar compounds) may restrict coolant flow through the passages of the cooling system or the engine components. Restricted coolant flow may cause engine overheating and/or damage to the cooling system or the engine components/assembly.
Install or connect the following:

Water pump. Install the water pump bolts. Tighten the water pump bolts first pass to 11 ft. lbs. (15 Nm); tighten the bolts final pass to 22 ft. lbs. (30 Nm). Water pump drive belt pulley and bolts (if applicable). Tighten the pulley bolts first pass to 89 inch lbs. (10 Nm); tighten the bolts final pass to 18 ft. lbs. (25 Nm). Surge tank hose Heater hose Outlet radiator hose to the coolant pump Drive belt Cooling fan and clutch assembly Upper fan shroud Inlet radiator hose to the water pump Air inlet duct Coolant

do you have the 4.9 in it they are pron for there heads cracking with out you knowing or any smoke coming out you tail pipe.

check the serpentine belt for slipping, the clutch fan, the thermostat(might be stuck closed) or maybe it is a circulation issue, you can check the radiator and radiator cap for defects and sediment buildup.
you might be able to confirm circulation problem if you turn heat on and it doesn't overheat.

1 Inspect Cooling System Mix Coolant level low or flow is restricted. 2 Inspect Belt Incorrectly routed, adjusted, tensioned, missing, or worn water pump belt(s). 3 Inspect Oil Pan Gasket - Performance Ruptured, cracked or leaking radiator hose. 4 Inspect Radiator Cap Worn or damaged radiator cap 5 Inspect Thermostat Thermostat stuck closed 6 Inspect Fan Blade Broken, missing, or defective fan blade(s). 8 Inspect Water Pump Damaged, worn or leaking water pump. 9 Inspect Intake Manifold Plenum - Perform Leaking water pump gasket. 10 Inspect Cooling Fan Control Faulty cooling fan control or circuit. 11 Inspect Cooling Fan Switch - Radiator Faulty radiator cooling fan switch or circuit. 12 Inspect Engine Temperature Sensor Faulty engine temperature sensor or circuit. 13 Inspect Temperature Switch Damaged or faulty temperature switch or temperature switch circuit. 14 Inspect Fan Clutch Worn, loose or faulty fan clutch. 15 Inspect Ported Vacuum Switch Damaged, leaking, or faulty ported vacuum switch. 16 Inspect Radiator Obstructed radiator core or radiator cooling fins. 17 Inspect Head Gasket - Performance Head gasket leaking coolant into cylinders