{"nhtsa_id":10183110,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-11-30","date":"2020-10-22","document_id":"CMI-S5T7S-11","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING:COOLING SYSTEM","mfr_system":null,"summary":"These are representative communications from the Cummins producing plant to affected vehicle manfacturers regarding a potential valve spring issue on certain B6.7 engines. A supplier potential manufacturing defect may cause these valve springs to fail while in service. The engine plant initiated corrective action with affected OEMs.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10183110-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10183110-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10183110","components":[{"id":"engine","name":"Engine","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"B6.7","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":[]}