Thank you - I had seen your thread and wondered if it was the same issue.
Having replaced the expansion valve, does it need regassing, or it is that straightforward? I' watched a YouTube video, but may yet outsource it to a local specialist.
I've been living with it for ages! It's annoying though - the 3.2 litre engine is so smooth and quiet that this noise really detracts from the enjoyment! First world problem, granted.
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