My mate has a Mk4 diesel sorry dont now what engine size and the other day on his way home a screech started from the engine bay. we have located the noise to the top center at the back it seems to happen after about 3000 rpm and there is a small amount of smoke/steam from the area aswel.
the cambelt has recently been changed and the egr cleaned i dont no if they could of disturber something.
sorry about the lack of details.
any ideas what the noise is would be appricated.