When repairing the engine of the car, the dismantling of the main parts is carried out with standard mechanic tools. In some cases, you may need a special device - valve loosener. Its task is to help the driver remove the "dryer" of the valve. This device provides an opportunity to work with one specialist, and to perform the removal of the "dryer" valve without such a device, you need two people. Also, the owners of the car service center should get such a device, which will greatly facilitate the work of employees of the service station.