Hi all, have a petrol v6 and on idle it makes like a rattle noise, have had a couple mechanics look under bonnet but nobody seems to know wht it could be. When revs go over 2k it stops the noise completely. Happens in park, neutral and driver and reverse make no difference. Wondering if anybody had any idea. Does not affect performance at all, no flat spots or lack of power or hesitation. Under hard acceleration from a standstill it goes almost instantly, but when poodling round town sitting at 1500 rpm the noise is apparent.
Any ideas ppl? Cheers