Originally Posted by
Series1Guy
I own a 406 hdi. definatley bottom pully. They have really comedown inprice lately too. used to be a main dealer only part. You can get them anywhere now
They are a cushion drive type thing and it fails. Have a look for tiny metal shards around the pull area and on the block.
I replaced mine with a 2006 spec item and it looks different and i beleive is a solid item rather than what used to be on it
i would only use an OE part, it defo is the bottom pulley making the knocking noise they are 2 metal bits bonded together with rubber and it perishes and fails, causing them to come loose from each other and knock!
a none genuine item wont last 12 monts so false economy!