I have a 2000 ram 1500 with a V-6. What temperature should I be running with AC on and a 90 degree F day. My temperature gauge appears to read warm, I would guess reads 240 degrees F. New thermostat is 2 years old. New water pump is 3 years old. Late last summer the radiator started leaking so I put in some stopleak. Is the radiator causing my overheating problem? I want to replace my radiator but I want to make sure my problem is fixed.
First you need to determine what the temperature actually is.
The electronic gage system may not be accurate.
Check the rad temp [top rad hose] with an IR gage or some other known to be accurate. instrument before you add any parts.
BUT the last time I used stop-leak it stopped up flues in the radiator.