What would cause my temperature gauge to fluctuate

The gauge goes up when the thermostat closes and the gauge. Im concerned there is oil getting by a head gasket.

Closely located to the reservoir tank is the radiator fan.

What would cause my temperature gauge to fluctuate. What would cause my temperature gauge to fluctuate. One common cause is a defective thermostat a component that is inexpensive and easy to replace. Other causes of a fluctuating temperature gauge are a failing radiator fan insufficient coolant level and a leaking cylinder head gasket.

A failing radiator fan will be erratic. In case you have a faulty gauge youre lucky because the engine hasnt suffered any potential damage due to temperature fluctuation and neither have any parts of the cooling system. If the temperature gauge fluctuates alongside.

Youll have to check out the entire cooling system before you get to the head gasket. The radiator could be plugged could have plugged cooling passageways could have a defective water pump loose belt issue collapsed hose excessive load on the engine due to dragging brakes underinflated tires and so forth. A temperature gauge will normally fluctuate as the thermostat opens and closes.

If it is fluctuating wildly then there could be several issues. A damaged water pump. Low water in the cooling system.

Air trapped in the cooling system. A partially plugged up radiator. A bad temperature gauge.

A bad temperature sending unit. Closely located to the reservoir tank is the radiator fan. The fan is expected to pull in air through the radiator when your car is not moving fast enough to draw in air.

Having a failing fan can be erratic and can cause your engine to get overheated. A lousy radiator fan can lead to a fluctuating temperature gauge. Let me know.

Also if possible upload a pic. Im concerned there is oil getting by a head gasket. Take a look through this link to see if anything mirrors what you are seeing.

Also a bad head gasket can cause temperature fluctuations. What would cause the temperature gauge to fluctuate. One common cause is a defective thermostat a component that is inexpensive and easy to replace.

Other causes of a fluctuating temperature gauge are a failing radiator fan insufficient coolant level and a leaking cylinder head gasket. A failing radiator fan will be erratic. Abnormally high temperatures are usually caused by infectious processes.

Most infectious will cause fevers that fluctuate on a daily basis by as much as a degree Celsius up and down or two degrees Fahrenheit. Some infections like pneumococcal pneumonia and typhoid fever do not cause significant temperature fluctuations. Gauge fluctuates constantly between normal and 210 in cool weather 40 below.

Also during accleration it will rise to 210 and drop back down never staying at a constant temp. It constantly moves between normal and 210 exempt during summer time it stays steady. Keeping this in view why does my boat fuel gauge fluctuate.

The fuel gauge can be incorrect because the fuel sending unit has failedThe gauge itself has failed or there is a loss of ground or power to the sender or gaugeThere are many different causes and. However now whenever I drive it my temp gauge fluctuates. It never did this before in all the 3 years Ive owned it and only started after the work was done.

When I contacted the shop about it they said the thermostat needed to be changed so both would work more compatably. I agreed to this but the gauge still drifts. The temp gauge fluctuates from normal 185-200 jumps to 250-270 than immediately back to normal.

My Banks confirms the temp change. I replaced the temp sender coolant tank cap and have disconnected the EGR plug with no changes. It happens at part throttle with a slight load.

Hard throttle does not make the problem worse. Ive noticed over the last several weeks my temperature gauge will fluctuate somewhat. Im very particular and certainly dont want to run my car hot so I dont like it at all.

According to the gauge Im used to seeing it around 190 degrees or somewhere close to that. On occasion it will fluctuate up to 220-240. The temperature gauge on a car fluctuates because the cars thermostat is opening and closing.

The gauge goes up when the thermostat closes and the gauge. It suggests that a plugged heater hose or heater core can cause engine temp to fluctuate. Until the problem is solved information like this could be the key to the solution.

Air in the cooling system can also cause the temperature gauge to stay cold if there is an air bubble right at the sensor spot. This can also often be indicated with a fluctuating coolant temperature gauge. If you suspect air in the coolant system you have to bleed your coolant system with a unique bleeding technique.

When the thermostat opens it allows hot water to be pumped out which is replaced by ice cold water coolant. As the engine water temp drops the thermostat closes. But by this time more ice cold water has entered the block cooling the water in the engine even more.

This results in your temp gauge fluctuations. July 5 2016 934pm 2. Check the coolant level and make sure it is full.

There may be a air bubble causing the heater problem but there may be head gasket problem and exhaust gases are getting into the coolant and causing the trouble. Have a block check done to see if that is happening. The only time my temp gauge fluctuated like that was when I was low on coolant.

Get a gallon of premixed coolant or distilled water if you are in no danger of freezing or overheating and dump it into the reservoir and see if your temp gauge doesnt. The main reason why car temperature gauge goes up and down while driving is because something is not working properly in your cars cooling system. It could be the radiator fan water pump thermostat valve coolant or the gauge itself.

If youre driving your car and the temperature gauge is stuck on high low or going crazy the issue is most likely with your thermostat. The job of the thermostat is to regulate the movement of coolant in your vehicle and maintain the best temperature for engine operation. Doesnt do it until it gets up to normal operating temp.

Sometimes when it does it my truck sputt. 5 Jun 28 2004. The one on the rad is the fan switch I believe.

The temp sensor should be on upper hose neck on the engine. Check your coolant level and leak. Air pocket will mess up the sensor reading.

In this weather the.