MOTOR OIL LEAKING FROM CAMSHAFT PLUGS AND FROM CAMSHAFT SENSORS LEAKING ON TO HOT MOTOR AND ON TO HOT EXHAUST COMPONENTS CREATING SMOKE WHICH ENTERS THE HEATING/COOLING SYSTEM CAUSING THE NEED TO OPEN WINDOWS IN WINTER. HAVE REPLACED TWO CAMSHAFT PLUGS AT ABOUT 12 MONTHS AGO AT ABOUT 70,000 MILES AND SCHEDULED ANOTHER SERVICE CALL FOR CAMSHAFT SENSOR LEAKING OIL AT ABOUT 88,000 MILES. INTERNET SITES SHOW SIMILAR FAILURE ON CAMSHAFT MAGNET SENOR COMPONENT. *TR