The Thermostat opening & Closing, The cooling fans cycling on and off, the engine working harder than the cooling system can handle. an air bubble in the cooling system, to mention a few
low coolant
Most definitely. A blown head gasket can cause the temperature to rise and put back pressure into the radiator, therefore possibly causing the radiator hoses to blow, or even bursting the radiator.
A short in the turn signal wiring can cause the voltage gauge to fluctuate. A loose ground wire can also cause the gauge to fluctuate.
bad thermostat or water pump
Yes, as long as the water temperature is between 74 and 80 degrees Fahrenheit. You also don't want the water temperature to fluctuate much or it will cause stress on your tropical fish.
Yes, a thermostat opens and closes in response to the temperature in the cooling system under normal conditions. If it is sticking it can cause fluctuations in the radiator coolant temperature.
A/C or defroster on Relay stuck in closed position Temperature sensor not sensing proper temperature
Having a short in the turn signal wiring can cause gauges to fluctuate. If the battery gauge is fluctuating corrosion on the cables can be a possible cause.
5 reasons that may cause a sales budget to fluctuate are Price volume Demographics Economy competitors
yes... because you gonna loose water..
no it will not!
the hoses leading to and from your radiator might be clogged. If you had a rusty radiator, the rust may have clogged the hoses that carry the coolant. you should check all your hoses and even flush them out.