Originally Posted by
awaiken
Have you been able to distinguish where abouts the knock is coming from? It could be a simple valve adjustment job, however if you've been to a mechanic and they haven't told you anything then that's a bit worrying. I have a d16y4 in my civic and it's a pretty noisy engine in itself, has done 179xxx k's and the valves sound like a freight train sometimes, but no real knocks as such. Might be worth taking it to a different mechanic, they may be able to tell you more. Definitely sounds head related though.