Hello, it sounds like you car may have a thermostat problem, one way to find out if you do put the heat at maximum in the car, the engines heat will be distributed inside the car, if you engine temps go down its probably it, the thermostat is the valve who controls the flow of coolant in the engine
SOURCE: 2000 Sunfire coolant problem. Engine overheating,
ok, its time for a radiator flush. there is major sludge in the internals of this radiator. Make sure the thermostat is in the correct position as well. I've seen many cars come into my shop with the thermostat inserted backwards.
SOURCE: 2000 Jetta VR6 temperature gauge sometimes dips
remove radiator cap on resevoir and remove hose on the side hold hose over bottle have someone start the car hold rpm at 3000 if coolant isnr rushing out of the hose the water pump is bad if coolant flows the temp sensor is bad
SOURCE: 1996 Acura 3.2TL Overheating Problem...
From your description of symtoms it sounds like you have a bad water pump. If the coolant is not circulating properly you will have a heating problem. Sometimes even a new thermostat can stick and cause the engine to overheat. I have seen them fail in as little as a week after they were installed.
SOURCE: I have a 1996 Acura 3.2TL[V6] and it is overheating...
I had the same problem, whole new radiator, new hoses, new thermostat, and still overheating. What the problem was for me...bad radiator cap...all that money and a $20 fix...try it?
Testimonial: "YES... I HAD THIS DONE ALREADY... BUT IT HAPPENED EXACTLY AS YOU SAID... THANKS ANYWAY!!!"
SOURCE: my jeep overheated lastnight..it got
Well, fortunately 250 is not extreme....So, no info on your year, so I will take a stab generically... Something happened. (duh), it could be it just got low on water, could be a leak...here are the next steps.
But first the upper rad hose may be a good clue: for a long time cooling systems had a recovery system...essentially, small amounts of coolant would be heated out, so this small amount of fluid was captured in a recovery system. This recovery system is outside of the pressurized cooling system....
Fluid goes into the recovery tank when hot, and this is normal. Then when the system COOLS, the radiator cap has a 2nd valve that alllows the coolant in the RECOVERY tank to be drawn back into the pressureized side.
The statement of the collapsed upper hose (replace it??) means this reverse system may be plugged or the cap is sticking...the function at this condition is that you would push heated fluid into the recovery tank and not get it back, so the next day you start the process short on fluid.....
So, look into that part, THEN fill with coolant to acheive the correct mix (if you put water you may want stronger % Coolant, when in doubt, drain it and start again with correct mix, it is important).
Heater on full at all fill and testing times. Pressure test the cooling system and look for leaks. Fix any that you find. Monitor the system...Thermostats need to be replaced routinely, in my opinion. Consider throwing on a rad cap and thermostat and have a good starting position to test and monitor the system.
Consider a flush of the cooling system...Easy at a lube shop and they recover the fluid.
Testimonial: "thank you...i did all that except replacing the thermostat and seems to run perfect...seems like my loose radiator cap started it all..i replaced it 2"
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