My son has a 1999 1.7 puma. I recently found a oil stains by the timing belt and the belt itself looked discolored so i changed the timing belt and the two camshaft oil seals and crankshaft oil seal. Also changed the rocker cover gasket. All was ok for a couple of weeks but now the problem seems to have come back. Is there anywhere else that the oil could come out from that i might have missed. Could do with some new ideas. Thanks.