@hassantahir2, thanks mate , I met him personally and he voiced out the same expenses. Even I have got some things done already from my own mechanic , and as the work has been in a process for 2 days, it estimates me a 42 to 45k expenses. And I bought a combination of japaneese and korean parts, as i visited a whole bunch of markets , and what most of the experts voted is a "combination of japaneses and korean parts" for santro overhauling. People who say that there is a hardly a 25 to 27k total expense for overhauling are naive, or do not know the difference between a General overhaul and Full overhaul.
General overhaul doesnt make a sense, niether it is recomended. Full make sense, becasue the timing of new parts with all new parts makes sense. Although I had some other extra works for my car included in this 45k estimate, if making it a nitshell estimate only for a best quality overhaul with best quality parts, then it would bang my pocket with just 17k parts, 7k kharad, and 8k mechnical service - it sums around 32k to 35k - so there is 10k left out of 45k , and that 10k is incuded the repairing of a broken gaurder of engine placement, radiator, transmisson repairing , oiling etc. Let me have the 3rd day experience, i will share more in coming days . I am open for suggestions