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Re: 1995 monte carlo overheating
If the radiator fan isn't coming on I would check the coolant temperature sensor which tells the fan to turn on. Check your owners manuel for locations of fuses or relays that control the fan. Lastly you can unplug the fan and direct jumper it to make sure the motor isn't burnt out. I hope this helps.
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Replace thermostat and radiator cup flush radiator with RF-505 flush run engine with no thermostat for 30 minutes than fit new thermostat check radiator hose top and bottom has to be even hot if still same then change the central unit for the fans .
Car must use red coolant or yellow generic designed for newer than 1995 vehicles. Why you wonder - Red is designed for 272 Degees of total fluid heat and since newer vehicles are Aluminum Motors / Cylinder heads it is required to have a Red / Yellow anti - freeze coolant mix to carry - transfer heat out to radiator to be cooled by wind or Temp sensor turning on radiator fans . The older Green coolant is only good to 230 degrees before boiling over . This green in older engines worked because Iron / Steel engine blocks - cylinder heads Absorbed Large amounts of Heat . 1995 and Newer Aluminum does not absorb heat and will Warp Block - Heads if not kept cool ergo milky looking Oil - Coolant . Be sure to get cocentration to 50% REd or Yellow Coolant to - 50%% Water , this also helps fight heat and will give you good winter proction at cold temps.
Change the thermostat and the coolat resevoir cap.These are the 2 main things for overheating problems. The thermostat sticks and the cap will let coolant escape from the tank, after a couple of trips the engine overheats. Also make sure your cooling fans are coming on. Physically pull the relays and all fuses, as the do lose contact.
There should be a little bleeder usually located on top of engine that you open when the car is running to bleed the air out. If this hasn't been done you may have air pockets trapped. Also check the fins of your radiator and AC condensor to make sure they are not damaged or full of dirt or debris that will restrict air flow. The inside of your radiator may be getting plugged up. You may have a head gasket leak. If a head gasket leaks exhaust into your cooling system it can cause overheating. If you can run your car with the radiator cap off watch for bubbling. If you notice a bunch of bubbles exhaust may be getting into your cooling system.
If relay and fan fuse are good, disconnect coolant temp. sensor, sensor will be on thermostat housing or just below it, fan should come on right away, if it does replace sensor, if it don't check voltage at cooling fan harness with sensor disconnected, if you have voltage there replace cooling fan assembly.
Better make sure the fan works. There is a switch on the radiator that turns the fan on when it gets to a certain temperature. It could be the fan or the switch. Your thermostat is not your cap, it's in a different location. (Usually at the engine end of the upper radiator hose) Get the leak check! A good garage can pressure test the system to see what leaks you might have.
Yes it can. To verify, unplug the temp sensor at the lower radiator hose. If your fan turns on then you have to replace the temp sensor. Otherwise swap the relay of the AC fan with the radiator fan. If it turns on, have the relay replaced, if not have the fan replaced.
Make sure you don't have a bad head-gasket. Check for excessive pressure in radiator or hoses. Check under oil cap for creamy/milk like residue or actual antifreeze in oil or the opposite oil in antifreeze. Let me know what you find. Good Luck