Engineering industry represents everything that is developing, manufacturing and selling cars, being one of the most important economic sectors in the world to bring income. In general, companies in this sector are multinationals that produce in their country of origin or to countries that have purchased or built production plants. The main objective of this paper was to study on improving the operation of the post of starting diesel engine. Failure to comply with the priming operation adversely affects the quality indicators on the plant. All these problems have forced to find solutions for their elimination. In order to eliminate the problems, a thorough analysis of the post has been started. Difficulties in finding the solution consisted primarily in the lack of funds to purchase a new priming plant, as the current installation is an integral part of the tank filling facility. This study aims to find solutions to eliminate failures due to improper execution of this operation, defects which are registered in the program that handles the top factory defects and which is calculated based on one of the most important indicators of quality.