Anot144 Bibliografické údaje: POŠTA, J. - PAVLÍČEK, R.: Diagnostika těsnosti spalovacího prostoru motoru. /Vyžádaná přednáška/. In: Sborník z mezinárodní vědecké konference "Trendy lesníckej, drevárskej a environmentálnej techniky a jej aplikácie vo výrobnom procese", TU, Zvolen, 2001, s. 25 - 30, sekce č. 3, ISBN 80-228-1055-2 Abstract: The servicing of machines is getting more challenging, complicated and expensive. Nowadays machines are able to be nor engaged neither serviced without any suitable diagnostic ways. The trend leads towards permanent automatical monitoring of all important parts and functions of machines. For this purpose it seems to be handy to use dynamic ways of demountingless diagnostic done directly during the real engine running. This present reflects the results and knowledge based on the experimental testing possibilities of indirect reading of leakproofness of room inside the internal-combustion engines by the help of an analyse of the intentaneous stream running done off a starter gear and of the intentaneous tension running on starter connectors during the engine ignication. The work describes the basic impact on an accuracy and reliability of obtained results and there are also compared both of these possibilities. Klíčová slova: těsnost spalovacího prostoru, proud spouštěče, napětí spouštěče, relativní kompresní tlak