Thank you so much dear @cerwinvega bro.
1- I will be doing this as soon as I come back in Lahore from my home town.
2- Ok I will leave it this way.
3- Yes, couple of experienced guys and mechanic told me it could be water pump. So will change it after making sure again.
Please suggest how to get genuine stuff as there are many fakes around. Should I get all stuff of SGP or any other genuine brands will work fine too? and any price difference?