OK fair enough, but the mkII V70 did not have egr on petrol engines to my knowledge. Also agree good idea to be careful with the header / manifold, but for now I'm just looking for advise wrt. what the issue, ight be. I have bad experience (costly) with asking workshops to diagnose for faults. If I ...

Hi, when car is idling there is obvious exhaust leak sound coming from the engine bay, around the exhaust manifold/turbo area. The funny thing is, it sounds like a valve is closing and opening cyclically when the car idles for a while, which makes the leak noise go away and come back on. I.e. there ...