Update, noise is coming out of the intake, much louder with airbox open. So i took it down to the closest Land rover specialist who spent the day checking valves and compression, all fine and believes its a sticking EGR. Anyone had this before? Blanking it tomorrow and will update if noise is gone

Hi guys, New to the group, also new to TD5 ownership after 10 years of messing around with Volkswagens (i know). I picked up a 2004 D2 TD5 automatic, 170k and previously owned by F1, so has been up and down Europe trailering cars and team members etc. Good service history. At idle, cold...