1 Remove the timing belt and camshaft sprocket of Fiat Punto.
2 Punch or drill a small hole in the oil seal. Screw a self-tapping screw into the hole, and pull on the screws with pliers to extract the seal.
3 Clean the seal housing, and polish off any burrs or raised edges, which may have caused the seal to fail in the first place.
4 Lubricate the lips of the new seal with clean engine oil, and drive it into position until It seats on its locating shoulder. Use a suitable tubular drift, such as a socket, which bears only on the hard outer edge of the seal. Take care not to damage the seat lips during fitting. Note that the seal lips should face inwards.
5 Refit the camshaft sprocket and timing belt of Fiat Punto.