Did mine today with a bypass kit from that chap in the Chek republic, no probs at all. Those that have said about the gunk build up were'nt kidding, two cans of Mr Muscle oven cleaner (bless him), almost a whole duvet cover and a final wash with petrol and the manifold looked like new. Pretty much covered most door handles and the tools in the gunk. Apart from an initial scare when the engine popped under load and started belching black smoke, (90 degree turbo pipe blew off, needed to be tighter), its now like a new engine, feels like a ruddy sports car. I can only assume there must be a leak in your connection to the blanking point!