{"nhtsa_id":607294,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-09-17","date":"1999-05-01","document_id":"98B33","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"OWNER NOTIFICATION FOR REPLACEMENT OF ENGINE CYLINDER HEADS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/607294","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"EXPEDITION","year_from":1997,"year_to":1998,"match":"exact","vehicle_ids":["1997_ford_expedition","1998_ford_expedition"]},{"make":"FORD","model":"F-150","year_from":1997,"year_to":1998,"match":"exact","vehicle_ids":["1997_ford_f-150","1998_ford_f-150"]},{"make":"LINCOLN","model":"NAVIGATOR","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_lincoln_navigator"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}