Head gaskets of both engines (0.8 and 1.0 litre) are prone to failure due to overheating. This occurs because the plastic heated inlet manifolds eventually warp, losing coolant and leading to the overheating. Replacing the inlet manifold can cost more than the car is worth. You have to face the fact your car was built to last 6 years and it's already at least 13 years old. More: www.honestjohn.co.uk/carbycar/daewoo/matiz-1998/?s...d