{"nhtsa_id":11034571,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-07-07","date":"2026-06-30","document_id":"TSB260092","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution steps for the viscous vibration damper on certain B6.7 engines which may contain fluid that can become thicker and expand, bulging the viscous vibration damper, resulting in engine vibration and the possibility of viscous vibration damper mounting capscrew fracture.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11034571-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11034571-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11034571","components":[{"id":"engine","name":"Engine","parent":null}],"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":[]}