I have a 1969 Chrysler with a new 3 core radiator. It still has the stock water pump and I am wondering if a high volume pump would make it run cooler at higher speeds. It runs hotter when you get off the freeway. I have flushed the system and installed a new thermostat. I also replaced the fan clutch. I am at a loss of why it still runs warmer than the 180* thermostat.
Sometimes I really wonder about Robert. Yeah, water boils at 212--AT ATMOSPHERIC pressure. But a cooling system is pressurized to RAISE the boiling point. So, ah, Robert is once again in left field. Because if you wait for it to boil over, you've probably already caused engine damage. You do NOT need a high volume pump. The 3 core radiator does NOT need more flow. The temp gauge should not fluctuate. That's the job of the T-stat--to regulate engine temp and keep it at a set point. If you're engine is getting hot at higher speeds, Check for missing baffles or cracked fan shroud
maybe the fan is too far away from the radiator to efficiency pull the air at slow speed. They sell spacers.
IT is normal for the engne to WANDER AROUND the 180 degree temp! if the engine does NOT BOIL OVER, then things are FINE! COOLANT boils as you know at about 212 degrees, and it may take the COOLING FAN longer to TURN ON! BASICALLY< if the engine does NOT BOIL OVER< then everything is JUST OKAY! USUALLY chrylsers run on the COOL side GOOD LUCK!!
