Hi folks,
how's things?
I have a very loud Scraping / Grinding sound on front of my engine. The noise is external, as apposed to inside the block. It could be coming from either the timing area, the serpent belt adjuster, one of the pumps or the Alternator, I can't work out which.
The first 3 days it made the noise I crapped myself, thinking the engine was about to explode, or something was going to fall off. By the time I opened the bonnet the noise had gone. The noise was/is like twisting a shuvel inside a metal bucket, but at a constant faster speed, maybe twice a second at tickover/idle, and scraping more on one side of the bucket than the other. After the choke closed the noise went away within a few seconds and the car drove without issue.
On the 4th and 5th days the noise didn't go away, but again became quieter (more quiet) as the choke closed & the revs dropped, which I would think to be logical; it is still quite loud, as opposed to very loud. The noise does increase with revs, as I assume would be expected.
The engine starts & runs ok, but does appear to run a little laboured, but only a little...
I have my suspicions, but thought I'd throw it out there to see if anyone agrees. Any suggestions or advice would be appreciated and gratefully received.
Thanks,
Paul.

Car: Audi A4 B8 2.0 TFSI Quattro S-Line 2009.

 

Update:

No need for any responses (lol) as I stripped my engine down & discovered the balance shaft chain was hanging loose. So, I replaced that chain and the Crank Cog... 👍

 

No need for any responses (lol) as I stripped my engine down & discovered the balance shaft chain was hanging loose. So, I replaced that chain and the Crank Cog... 👍