When you’re driving a turbo car at a high rpm, it needs some time to cool down before you shut down the engine. This is called the idling rule. A lot of people don’t believe it is necessary. We’re here to tell you whether or not the idling rule for turbo cars is a myth.
What is the idling rule?
After some hard driving, the turbo intake and exhaust compressors need some time to cool down. Slow down for the last km of your drive to let these systems cool down a little bit. Keep your rpms low as you’re approaching your destination. When you reach your destination and your car comes to a stop, let your car idle. If you have kept your rpms low for the last km of your drive, or your entire drive was a relaxed one, let your car idle for half a minute before turning it off. If you didn’t follow this procedure, and your rpms were high throughout your drive, let your car idle for at least a minute.
The idling rule can be applied to your engine in the morning as well. Let your car idle for 30 to 60 seconds after starting it before you touch the accelerator. This method is advisable for diesel and petrol cars. Be aware that if you are driving a petrol turbo car, it gets hotter than a diesel.
Why is it necessary?
It is not a myth! You may think that the idling rule is not worth your time, but believe me, it is. If you shut off your engine immediately after a hard drive, you could damage your turbocharger. In fact, this is the main cause of turbocharger’s failing! Be patient and let your car idle for a minute for the sake of your turbo.