Sir, are you still experiencing the knocking and rattling sound? I have a 2012 i10 base model and currently at 14k. I also experience the rattling sound when shifting gears upto today. I thought before it might have been my driving stlye because i used to drive a 2.0L car then shifting to 1.1L car. But i adjusted my driving style and ive been driving the i10 almost everyday but im still hearing the sounds. But now im more used to it and shifting to higher gear only when hitting 2700rpm. The noise decreased but its still there from time to time.

My problem now is coming from a gear then going to neutral, the rpm drops to around 500rpm. I havent done any adjustments to the engine except for having a change oil at Shell using semi-synth. Sometimes its difficult to know if my engine is overheating because there is no temperature guage if its rising. A week after the change oil i experienced overheating when i went to tagaytay coming from imus. It was 6am and i was not using my a/c, but when i reached tagaytay rotonda the engine suddenly shuts off. I didn't know if it was overheating becuase the temp indicator light didnt turn on. But i waited for 30min and added distilled water to the radiator. The engine seemed to be fine and i was able to continue my trip going to batangas and back to imus without any problems, but this time with a/c always turned on. Im thinking of 3 possiblities

1) the oil used was not suitable for i10 and made the engine heats up alot faster
2) a gas boy topped off my coolant reserve with the coolant and did not mix it with water, he said ok lang daw yon.
3) the radiator fan is not turning on when a/c is off. When i timed it, it started turning around 18mins when engine starts. I think thats too long

Any ideas?