I have a rover 200 s reg. had my head done 12000 miles ago, noticted lately a slight leak around the head. now i have been told to use bar seal leak stopper as it is a fluid leak not oil and water. The car has been running fine, goes like stink but cos of the leak i left it for 2 weeks or a bit more outside the house. i drove it yesterday for the first time and it drove fine done a good few miles to test it, no probs. today drove it again seemed fine however tonight drove it and it started to judder when i put my foot down but only now and again. does anyone think that this is my head ****ed again or is it something simple like plugs, leads, cap etc. maybe the leads have broken down or damp.my uncle is a mechanic but is no longer interested in cars so i really need some help to solve this problem.