Why does my thermostat go up and down?
If the coolant level in your car has gone down, air may build up in the empty part, and cause an air pocket. Due to this, the air may get trapped inside and cause the thermostat to go up and down. So, check your coolant level at regular intervals of time, and make sure that it is maintained at the proper level.
What should coolant temp be when engine is hot?
With a good OBD2 code reader, you can also check the live data and the parameters of the CTS sensor. Check that the temperature value of the CTS is around 80-90c when the engine is hot. A lot of engine coolant temperature sensors have two wires and the sensor is controlled by Ohm.
What happens when your coolant temperature sensor is bad?
The engine is very sensitive to wrong air-fuel mixtures at idle and this is a condition when you might notice that something is wrong with your engine coolant temperature sensor. The engine coolant temperature sensor can have a hard impact on the air-fuel mixture. A bad air-fuel mixture can also cause the engine performance to drop drastically.
Why does my coolant go from 180 to 210?
Problem continues except now it goes from 180 swings up to 210, then back below 180, then to 180 and repeates this all the time regardless of how long I drive. Anyone have any other ideas? New engine, new radiator, new theromstat, new temp sender…what could it be? Have you bled the air out of the system? That sounds like it might be the problem.
When does your car run hot or cold?
If you are like most drivers, our guess would be almost never. Most drivers look at their temperature gauge so rarely that many vehicle manufacturers don’t even include temperature gauges any more but just lights that will come on if your car is either extremely cold or extremely hot.
What’s the normal coolant temperature of an engine?
If you are driving slowly or stopped idling the fans keep enough air moving through your radiator to keep your engine cool. Engine cooling fans may engage at one speed or multiple speeds and may kick on anywhere between 180 and 220 degrees.
What to do when your coolant temp goes up?
Turn the heater on at high speed. Rev the engine and hold for a few seconds. You don’t need mega high RPMs. Just enough to get good flow through the system. Check flow at the radiator. Temperature swings are common in colder climates. Thermostats are notorious for swings.
Problem continues except now it goes from 180 swings up to 210, then back below 180, then to 180 and repeates this all the time regardless of how long I drive. Anyone have any other ideas? New engine, new radiator, new theromstat, new temp sender…what could it be? Have you bled the air out of the system? That sounds like it might be the problem.
How to tell if your coolant reservoir is overflowing?
How to tell if your over heating problem is caused by the water pump. Faulty water pumps slow or stop the flow of fluid through the cooling system. The result is overheating of the engine. You will see coolant fluid on the ground and around the water pump when the water pump has gone bad. Water pumps either work properly or go bad in a hurry.