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Its the aux belt/tensioner 100%, sounds like loud tappets when ticking over.
I had the same prob, replaced the charcole canister and it was still there.
Renault said there was nothing wrong with it and it wasn't till i had a 36 k service it went. They found it was loose and missing a bolt.
Put your ear on the drivers side head light as the carbon cannister is situated behind and down abit from there.
I changed mine..but still ticks. Renault said it was purging...I checked the pipes and got my cat tested and all was fine.
Renault have now given up and cant tell me what the matter is...im thinking of removing it.