What makes a temp gauge bounce back and forth but doesnt overheat on a 1999 s10 changed temp sensor thermostat radiator cap and clutch on fan and flushed and changed coolant?
Make sure you have the correct thermostat in there, if it is set too high you will get that bouncing.
The thermostat is set to open at a certain temperature and allow the coolant to exchange with what is in the radiator. Under normal conditions you will notice a rise and fall of the temp gage as the coolant reaches max temp then lowers after the exchange.
An overly sensitive sensor or an aftermarket gage set up will exaggerate it.
I would not worry too much since it is a good indication that your cooling system is working well, the coolant in the radiator certainly seems to be cooling down enough to cause a big swing in temp.
Check on that thermostat though as it may be letting the coolant get too hot before releasing it.
Your kia Rio overheats and blows out cold air you changed the thermostat But still have the problem?
Your 1993 Dodge Intrepid keeps over heating you have already changed the thermostat thermostat housing upper radiator hose radiator and pressure cap what is left to change?
I do not have a Grand Marquis so my engine does not overheat! Fords and Ford products tend to overheat and always have! Let's check a few things. How long has it been since you changed the thermostat and the coolant? Those two things are the most likely culprits. What is the condition of the hoses? Have those been changed in the last several years? If you have changed the hoses, the thermostat, and the…
Answer Because the engine cooling fan does not work properly or does not work at all. There are many reasons which may cause Engine overheat. the above is also one of them. Loss of coolant loss of coolant because coolant leaks from anywhere on the cooling system. Loss of coolant because radiator cap is broken and will cause overheat. Loss of coolant because radiator cap pressure is less than the required. Loss of coolant because…
Low coolant? Cooling fan not working? Defective thermostat? Radiator clogged or air flow resitricted? Defective radiator cap? Defective water pump? Airbound? Low coolant? Cooling fan not working? Defective thermostat? Radiator clogged or air flow resitricted? Defective radiator cap? Defective water pump? Airbound?
The Mercury Villager and Nissan Quest are basically the same vehicle. The radiator is cooled by an electric fan and thermostat. If either of these are malfuntioning, that could be the cause. Otherwise, all of the normal things such as low coolant, bad water pump, clogged radiator, bad radiator hoses, bad thermostat,and incorrect timing could all cause the engine to overheat.
Low coolant, blockage in the cooling system, failed thermostat, failed pressure relief cap, blockage of air flow through the radiator fins, burnt out coolant which has lost its heat transfer efficiency... if you want to narrow it down, you're going to have to do some diagnosis, rather than expecting us to be able to definitely say, "yes, it's definitely....." on here.