Overheating

Try bleeding it

Always bleed air from cooling system after replacing coolant. Set heater for maximum heat. Remove radiator cap. Loosen drain plug and remove drain bolt (if equipped) from engine block. Drain coolant reservoir. Fill coolant reservoir to MAX mark with 50/50 water-coolant mixture. Loosen bleed bolt and fill radiator up to base of filler neck. Close bleed bolt when coolant flows out without bubbles. Tighten bleed bolt. With radiator cap removed, start and operate engine to normal operating temperature. Add coolant if necessary and check for leaks.

Get it chemically check by using the block check to find out if it has a combustion leakage.

Take the thermostat out and see what happens.

I don't think the heater core is involved here. But you can try looping it around and see what happens. I would recommend doing a pressure test to rule out combustion leakage and the a test of the radiator cap. Since you're sure the water pump is doing its job-sounds more like an airflow problem-

Might want to check the radiator for clogging

Have it block and pressure tested-do the block first to pinpoint a combustion leaking into the cooling system or a gas analyzer to sniff for hydrocarbons at the radiator fill neck.

Pressure test: do not do a pressure test if there's leakage at the headgasket this might cause coolant into the cylinders and lock it up or bend a connecting rod if cranked thereafter. The headgasket should be repaired before doing the pressure test.

If the block and pressure test passes check the following: Pressure test the Rad. Cap, Clogged radiator, Fan clutch, Radiator electrical fan, collaspe hoses, water pump.

Thank You Sir for coming back and letting me know what the fix is and it'll be recorded in my files for other people in need with a similar problem.

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