Could hear a whistling/roaring noise when on boost driving home yesterday, got louder with the turbo. Suspected a boost pipe to have gone but no they're all fine, had them off and had a good look. Bit of a sod to do but needed to be checked - all fine. Spoken to my dads friend who is the head mechanic at the local Volvo dealer and has been doing our cars for the last 20 odd years, he said if it's not the boost pipes, it might be the intercooler has cracked slightly. There's some black smoke on acceleration and it feels a little down on power. Everything else has been checked over with no faults.
So guys, sound like an intercooler has started to go? Car has 200k miles on it. I can get a front mount one from a bloke in college that has one for sale for considerably less than a VX one so I might go for that. What is the max boost pressure from the 2.2 DTi?