A simple and cost effective vitreous enamelling technique is being adopted in the application of thermal barrier coating for internal combustion (IC) engine components. The raw materials including the process of coating are less costly in comparison to plasma spray technique. The coating using yttria partially stabilized zirconia with this technique is found effective for insulation of the engine components. The results obtained from this process are comparable with the published results using plasma spray *. At the speed of 1500 rpm, brake specific fuel consumption (BSFC) decreases upto 9.99% with 200 micron (μ) glass ceramic coating piston whereas with 500 μ coating, it decreases upto 19.67% with advanced injection angle (40° before top dead centre) resulting higher thermal efficiency compared to base line engine.