I took it to a mechanic in mardan, told him about the problem that car engine does tak tak in early gears with accelaration and gear change. He took a short ride and said lemme fix it in 20 mins. He went under the car engine bay, replaced a part( timing belt or chain) dont know the exact name of that part. After replacing the part, i took a ride and it was all fine.
I was impressed with the mechanic because i was thinking that i would need to open engine head. And he did not teased me just did the right work and all my fears about the engine of my car went away.