Knocking sounds from the engine

[Adrian96]

Hi guys,

I hope that someone here will be able to help me identify the problem. I’ve an Audi A5 2013 3.0 diesel. The engine runs smoothly however a knocking sound started from inside the engine. I’ve stopped driving it and the cars at the mechanic. We’ve tested the fuel pump and that’s 100% also no metal parts in the oil filter. I’ve attached a video of the sound. Has anyone here come across this issue ? We are still yet to check the chain.

[Steve Q]

Could it be a damaged crank, or bearings etc? 

What does the mechanic think? 

Only way you'll know it dismantling the engine. But from the sounds of it, it could be a big bill. 

[cliffcoggin]

It sounds like chain slap. At twice per second or 120 per minute it is too slow for the crank and cam shafts.