Gave my car a well deserved wash today and thought I better check my exhaust was still in one piece... All looked good but seems the valve was well and truly stuck, after a bit of WD40 and a lot of effort I've managed to free it up again, although managed to pull the spring off in the process, any way I just want to double check - when you laying under the back of the car, as you reach up to the valve if you push it forwards to the front of the car is this opening the valve and as you pull it back to the rear of the car closing again as I'm thinking of just keeping it open...... Hope this makes sense!
Thanks