{"nhtsa_id":10030408,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-09-29","date":"2008-12-03","document_id":"TIB-42-41","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)","mfr_system":null,"summary":"KENWORTH SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. TOP TANK REPLACEMENT FOR C500 AND W900 WITH ISX; FIELD CAMPAIGN. EARLY DESIGN TOP TANKS ON 1430 SQUARE INCH RADIATORS FOR 2007 EMISSIONS COMPLIANT ENGINES CAN CREATE COOLANT PUMP AND/OR EXHAUST GAS RECIRCULATION (EGR) COOLER FAILURES. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10030408","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"},{"id":"egr-valve","name":"EGR valve","parent":"exhaust-emissions"},{"id":"radiator","name":"Radiator","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"KENWORTH","model":"C500","year_from":2006,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"W900","year_from":2006,"year_to":2007,"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":[]}