{"nhtsa_id":10198485,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-06-28","date":"2021-05-14","document_id":"TSB210204-051420","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution of an external lubricating oil leak from the crankcase breather tube. This can be caused by debris from valve cover manufacturing process can plug the lubricating oil separator breather system, preventing lubricating oil from draining back to the crankcase.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10198485-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10198485-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10198485","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"L9","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":[]}