2008 Honda City Engine knocking Problem

Hi,

In most cases, a knock is related to a failed bearing. In the engine, there are many different bearings such as crankshaft main bearings and thrust bearings, connecting rod bearings, camshaft bearings, and so on.

Is the engine's oil pressure in the acceptable range? Also, have you checked things like engine compression to confirm there isn't internal damage?

Do me a favor. Take a look through this link. It describes different engine sounds which you may find helpful.

https://www.2carpros.com/articles/engine-noises

Also, if you haven't, check engine compression to confirm it is somewhat even in all cylinders. Here is a link showing how it's done:

https://www.2carpros.com/articles/how-to-test-engine-compression

I hope this helps. Let me know if you have other questions.

Take care,

Joe