Hi, hoping someone with better recall than I can remember a thread (a couple of months back maybe) where someone was having an issue with their car and a part was recommended. It was an inexpensive (Ł2-Ł3) plastic or rubber valve
Have a feeling MiniDeLux was involved in the conversation but cannot remember what the part was called, what it did or anything else that might help with a search of the forum. Just remember I intended to get one...and then forgot to do it. Have browsed through a number of threads so far with no joy.