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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
If you have a single row radiator, you can get a 2 row. There are shops that can custom make a 3 row with aluminum tanks if you want to spend the money. My 4.0 aerostar had a 2 row radiator and did fine in the phoenix summer heat.
Welcome to this forum! Flush the radiator, replace the thermostat, and clean the fins. The old radiator should be adequate to keep it cool. Do you use it for towing? Does it have dual A/C?
I have a 94 3L @ 137 K miles and while driving at 80 on the freeway in the valley with temp around triple digits was suprised to see no drop in the oil pressure gage and no raise in the collant temp either. Stock cooling system and AC on full. I have not towed with mine but some have and no issues. If it's overheating something probably is wrong.
Do you have signs of overheating (knocking, hesitation, steam coming from under the hood, etc)? If not then it's not overheating. You could check it with an infrared heat gun.