Same question and in my case rating was 81% :
1.Engine Valve Tappet Noise Abnormal Noise.
2.Engine Blow (Manual Check) Present.
i asked mechanic about the tappet noise he said it depends if the tappet needs little adjustment then no big issue but it could also be the whole engine and about the blow he said its not a good thing and the engine is weak.
I also found this video on pakwheels youtube channel which might help and there is also mention of the blow check at 3:50 Min.