Hiunday Diesel engine noise

I have a 4DBF 2,5 with turbo funeate well but when heating there is a noise like croack, croack synchronized to the movement of the engine, does not smoke, has power, is not an alternator, nor water pump, the metals and new tunnel in compensators The noise feels more in idle at 1500 as it tends to disappear.

What could it be.

I understand that you changed compensator metals you know that when the strap of the belt does not peel well in the BBA compensator. Oil The btbration evicts the compensator's metal
to peel the compensator, you have to take a bolt to the side of the comp. And a screwdriver is put in and that it locks the compensator that way you align the brands I think the noise comes out of that area I hope to be useful chao