I've noticed you often talk of "noises" in car engines even if the noises resemble knocking at the door. In Polish we call that "knocking". Does it work in Enlgish too? If so, would that be 'knocking' or 'a knocking sound'?
A: I can hear some knocking/knocking sound in my engine. Can you have a listen, please?
B: Oh, I can't hear anything. It must be just you.
A: I can hear some knocking/knocking sound in my engine. Can you have a listen, please?
B: Oh, I can't hear anything. It must be just you.