{"nhtsa_id":10043898,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2012-05-01","date":"2012-02-29","document_id":"TIB-14-022","mfr_campaign":null,"replaces":null,"component":"STRUCTURE:FRAME AND MEMBERS; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ENGINE SUPPORT BOLT TORQUE CAMPAIGN. *KB","document":null,"url":"https://open.wenmarpro.com/bulletins/10043898","components":[{"id":"structure-body","name":"Body and frame","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KENWORTH","model":"KENWORTH","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}