Dear members problem solved till now:
Timing was retard as checked by timing gun, was on 10 and distributor was fully moved so have to adjust timing belt as previous mechanic don't put on exact place. Changed timing belt as-well as 98k on odo. and timing adjusted on 18 now. time belt was of Rs 450
There was water leakage in place near timing belt pully coolant sunk from engine head from that place and was not visible because of belt cover, in mechanic terms " engine ki tikki" was badly damaged which previous mechanic had not care about as-wel while changing head gas-kit ( acting like tap water if removed the radiator cap and i think it was the main reason of heat up last time resulting of empty radiator with loose radiator cap) Engine ki Tikki cosed Rs 30
oil blow issue was of damaged pcv valve, that's changed as-well now costed Rs 850.
last weekend have chance to go on long with full load and with a/c on, there was no as such issue of heat up, low pick and oil blow, pick is bit awesome now with very much quite engine.
Thanks Xulfiqar bhai, hash4u, shazaryab, mikmech for you time and sugestions which helps me lot to deal with. will back to u soon after checking more results.