Its with my swift, which makes a weird noise at times. Mostly when the car is in idle condition (turned on) and when I bring the car to neutral when I am about to stop or on a declined road.
I thought it must be the bearing sound from the tyres, but along with that I get this too... something like tak-tak- tak- tak annoying.
I took to a mechanic close by, he told some belt has gone under the engine (I heard him say water belt/ bottom belt... is there something called like that.
He told he cant fix it, needs to be done in a service station(maruthi).