Hi
i need your help, advice.
In my engine from Golf mk6 1.4mpi i was replacing timming belt and oil sump and after this i have some kind of knocking from engine.
it wasn't heard before but it is very unlikely to have any connection with this job.

Please listen to that video. That knocking is irregular and what can it be? Piston slap or valve lifters?

https://youtu.be/8pvOr3lGHdM