Can you identify this engine noise ?

[OB1]

Your help needed ! .....

Can you identify this engine noise ...seems like a constant tapping / nock (tappets are set to correct tolerance) ...varying with speed of engine .... its extremely noisy ....many thanks



https://youtu.be/JFXllpATMdE

[Chris Williams]

Does it seem to be worse in the area your filming? whilst I agree it sounds tappet it may be the bearings on the A/C pulleys. Try disconnecting the A/C belt to see if it goes away
Chris

[Chris P]

Yes and if its not that, you could take the fan belt off as well, could be water pump..or alternator packing up (obviously don't run it for more than a minute like that)