(i) DECARBONIZATION:- This is the process of removing the accumulated carbon deposit on the valves on the engine cylinder head. It entails removal and grinding of the valve stem. It is carried out to improve the efficiency of the engine and reduce high fuel consumption.
(ii) OVERHAULING:- This is the total dismantling of engine componenent parts to put the engine back to proper working condition.
(iii) THERMO SYPHON COOLING SYSTEM:- This is the type of water cooling system that relies on the force of gravity for cooling of engine.
(iv) DILUTION:- This is the process of mixing together of fuel for proper cetonization before delivering into the engine combustion chamber.
