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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
checked the radiator for hot and cool spots and it was just fine..... when the temp gauge starts to move past halfway i can turn on the heat and it will go back to normal.... what can it be?
Running the heater and having it cool back down is normal. Shows you are right on the edge of seriouly over heating. From what you have stated, my guess would be restricted flow. Which comes to basically the thermostat or radiator.
