Hey guys I've had this problem on my car and had it fixed. I had the chain and tensioner done first time round and still had the same noise then had the adjuster done and was all fixed it cost me a total of £730 for the work but I had to pay labour twice lol. As with regards to the cam adjuster to look at it you won't be able to tel if it's broke, its regulated by oil pressure and it's the mechanism inside that's at fault. I'm so glad I've got this fixed now, I told another chap that lives up the road from me who had the same issue and he said he wasn't prepared to pay the money to get a rattle fixed. More fool him as within 3 months the chain had snapped and is still sourcing a replacement engine as it took the engine out in the process!!! Not saying that this will happen to every car but I think this issue justifies the money spent on it to fix. Hope this helps. I know a really good garage in ruby who has done a few of these now if any one is near to them I'd be happy to give you there details. Sam