Expert Reply: You'll want to unplug the block heater before you start the engine for a couple reasons. Mainly so that you don't accidentally drive off with it plugged in, but also so that the extension cord would possibly get wrapped up in moving parts or hot components.
Can you start your car with block heater plugged in?
It won't hurt anything to start it while plugged in.
Should I unplug my block heater before I start my truck?
Make sure the cords are not frayed, cracked or there's no corrosion from salt on the block heater plug. Don't drive over your extension cord. And, for goodness sake, don't drive away when the car is still plugged in. Unplug the block heater before you start your car.
Does it hurt to leave block heater plugged in all the time?
If you leave it plugged in for longer than 5 hrs in weather over 30 degrees it can scorch the coolant............
Can you plug block heater in when engine is hot?
Plugging in the block heater will also help heat the inside of your car faster. “It heats the coolant which is used to heat the interior of the vehicle,” Feist says. If you plug it in when it's warmer out, it probably won't cause any problems “other than premature wear on the engine heater,” Feist says.
Do you unplug the block heater before starting the car?
Either way.... I have done both with no ill effects. Usually, though, I unplug first so I don't forget to. It's just fine to start it with it plugged in... But as you stated, the biggest reason for unplugging before starting is so you don't forget and drive off with it plugged in... Leaving the block heater plugged in shouldn't be a problem.
Should you use an engine block heater in cold weather?
By using an engine block heater in a cold climate, your car will start up easier and use less energy. Additionally, because the engine will achieve its optimal running temperature sooner, the driver can put the vehicle under full load sooner without worrying about overstressing the engine.
What is an engine block heater?
An engine block heater is an electrical device designed to warm a part of the engine and/or the motor oil when the vehicle is not in use. There are numerous types of engine block heaters that use various methods to provide the heat. What Does an Engine Block Heater Do?
What is the difference between inline and bolt on engine heaters?
Non-circulating inline heaters are also spliced into a coolant hose, but the heating is restricted to that spot. A bolt-on heater is directly attached to the exterior of the engine block and heats it from the outside in. An engine warming pad can be placed on the engine or the oil pan.
Below you will find two interesting articles on a similar topic 👇Is it bad to drive on cold engine?
Can a block heater start my car while plugged in?