Good day, I have a Golf III GS. The problem is all the water I throw into the waterbottle pours out at the bottom. A more clued up neighbour says the waterjacket is broken/damaged. Question is: how do you replace this (is it a big job), and what is the cost in ZAR approximately? This car also has a problem in the sense that it cools down really quickly. Leave it for an hour and it needs to be warmed up again before you can drive it, otherwise the idling is low and the engine cuts out. PLS Help!!