When there's no thermostat in the engine there is no restriction to hold back the antifreeze in the engine to heat up and in the winter the hoses and engine will stay cold and also a check engine light will be lit unless yours is a burnt out bulbous
SOURCE: 1995 honda passport i have installed 2 thermostats
is the temp gauge getting hot as you drive the vehicle or does it remain at a constant temp? if no problem in coolant temp getting too hot (and overheating), then it should not be an issue.
you're sure radiator is filled with 50/50 mix of coolant & water to the top of the cap? if there's an air bubble trapped it could cause a problem. some cars have to be "burped" after refilling with new antifreeze.
if, however, its overheating, then i believe your radiator may be clogged preventing the coolant to flow across the radiator fins and cool properly.
try this. warm the car up (not the point of overheating, but hot enough for the t-stat to open), turn it off, make sure the electric fan is off (or unplug it is so equipped), then run your hand across the radiator. it should feel warm. if you feel cold spots, then that portion of the radiator is clogged preventing flow. new radiator is now in order.
hopefully its only a clogged radiator and not a clogged engine block.
hope this helped.
SOURCE: bottom radiator hose cold. upper radiator bulging.
The fan won't come on because the thermoswitch is in the bottom of the radiator, without coolant flow the switch never gets hot. Just because a part is new doesn't mean it is good, is the thermostat an aftermarket part ? I would take out the thermostat (leave the gasket) and see if the bottom hose gets warm. If the bottom hose does not get warm, you may have a blockage or bad water pump
SOURCE: radiator cool, engine temp = 140
sounds like your radiator is clogged, it will bring problems to you soon, you need to flush it really good, i dont think you need to replace it but it sounds like a typical clogged radiator, have it flushed, it you cant ur gonna need to replace it soon, if you keep running that car it might lead you to a temp problem while runing and u might end up hurting your engine...
u also need to check if your thermostat is working properly. go on google and look for the procedure, ur gonna have to take it off and do a test with hot water and a thermometer and see if its working properly.
hope this helps.
have fun!
SOURCE: 2002 dodge 1500 Changed radiator, thermostat, and hoses. No heat
Why was radiator replaced?Did it have heat before ? If it was plugged, the heater core may also be plugged. Try flushing it with a water hose in both directions. I dont know why the botton radiator hose would be cold, the radiator should be a uniform temp and the air coming through the radiator should be HOT, when the engine is at operating temp. What condition was the old coolant? if it was rusty, the water pump may have lower flow than normal.
SOURCE: BMW 1995 318i - Car Running Hot
There is a blockage or leak in your cooling system. That may come in a few different forms:
Incorrectly installed thermostat
Water pump not functioning - you may see water dripping from the pump or a stain from the hole under the water pump.
Severely coroded hoses/coolant passages - if the fluid is brown and the inside of the radiator rusty
External leak - you would see fluid on the ground
Internal leak - you would see steam/white smoke from the tail pipe or water in the oil (may look like chocolate milk or not), if the oil level is extremely high this would be a good indication
heater core bypassed
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