For last few days I was facing problem of water boiling in radiator bottle. according to some experts, the head gasket may be problem. I approached Mr. Tahir @ G-8 on last saturday. After inspecting the car, He turned down the possibility of head gasket issue and did following rectifications:
(a) change the radiator bottle cap
(b) adjust the engine rpm. As the rpm were too high.
(c) while adjusting the rpm on ac, the IAC valve found u/s replace the same.
Now the car is running OK. as the car is running for last three days. testdriver is requested to comment on it.