Pre-Run Engine

Now days, almost everyone have or use a motorcycle or a car. One of the frequently asked question is how long that we have to do pre-run engine. We can start with simple question. Why we need pre-run engine? My answer is we need pre-run engine to prepare the engine to run.

The basic physical theories that work in pre-run engine are thermal expansion and friction reduction. Engine always produces heat. The heat cause thermal expansion in the materials, especially for metals. The important part in the engine is piston that made of metals will expand. By the heat, we need to wait till get the stable expansion in the right temperature. Mechanical movement always has friction so it need oil lubrication. When the engine is not used for long time, the oil will flow down into the reservoir because of the gravitation force. The oil is not in the right place so the friction of the moving part in the engine is increase. To keep the moving part friction is low; we must do the right pre-run engine.

Some peoples give some tips to do the pre-run engine. They suggest short time pre-run engine due to increase the fuel efficiency. The fuel efficiency is important, but we must understand about the engine character that we use. Usually, I use simple procedure to do the pre-run engine. We can start the engine regularly and the simplest way is check acceleration. If the acceleration of the throttle and engine are equal, we can ride the motorcycle or car.