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Is it normal for coolant temperature to go up and down?
A common reason your car temperature gauge goes up and down and no heat is emitted is that your cooling system is faulty. You may want to check out clogged components such as the heater core, radiator hose, coolant level, thermostat, or water pump.
What would cause my engine temperature 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.
Why is my car overheating with a new radiator?
Most likely there is air still in the system. Once the car cools back down double check the radiator or surge tank level and top off. WORST CASE you could of potentially blew a headgasket overheating the vehicle and still driving it home.
Should I replace my thermostat when I replace my radiator?
The thermostat can, and should, be replaced when performing other cooling system service work, such as replacing the water pump or radiator hoses, or flushing the coolant.
What should the coolant temperature of my car be?
This will likely be somewhere in the 160 to 190 degree range based on what your drive. Another thing to consider when watching your engine coolant temperature is what the engine cooling fans are set to.
Why does my car Rev when there is no coolant?
The low level of coolant won’t cause engine surging, nor will air in the system. It is good to try to get it out though. The rev surging might be an idle-control valve trying to do what it does. Have a good mechanic take a look.
Can you change the coolant at the same time as a thermostat replacement?
You can change it same time as the thermostat replacement. Read the Honda groups on the Internet. The low level of coolant won’t cause engine surging, nor will air in the system.
Do you have to wait for the engine to warm up?
You also need to wait for the engine to warm up and for the thermostat to open, otherwise you could have some air trapped in the block with no way out.