I have a 2002 496 mag. my coolant tank keeps leaking out. It leaks just whats in the tank and then stops. I did notice 2 seals or inserts made out of rubber going into the heat exchanger and thats where the coolant leaks out. I think thats where the tank also meets the exchanger. So is this a common problem and how bad is it to run like that and how much work would it take to replace the seals. It looks to be on the top of the engine so getting to everything is not all that bad. Also what are the little valves for on the heat exchanger. I see a little blue tool but have no clue what they do. They look like tire valves. 2002 496 mag with closed cooling. Thanks.