{"nhtsa_id":10030406,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-09-29","date":"2009-01-07","document_id":"TIB-42-42","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY","mfr_system":null,"summary":"KENWORTH SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. C15 UPPER WATER PIPE REPLACEMENT CAMPAIGN. RADIATOR CORE MAY CRACK AROUND WATER INLET PORT. T800 WITH WIDE HOOD CONFIGURATION AND C15 ENGINES, BUILT 8/18/06-9/10/08. RADIATOR INLET PORT MAY EXPERIENCE HIGH LOADS AT INLET PIPE AND UPPER WATER HOSE, RESULTING IN A CRACK AT RADIATOR CORE. A SHORTER UPPER WATER PIPE, LONGER UPPER WATER HOSE AND SECOND PIPE BRACKET WILL REDUCE THESE LOADS. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10030406","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"},{"id":"radiator","name":"Radiator","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"KENWORTH","model":"T800","year_from":2006,"year_to":2008,"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":[]}