{"nhtsa_id":10163648,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-08-12","date":"2019-07-24","document_id":"TSB190133-072420","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution of lubricating oil seepage from the crankcase breather tube at rocker lever cover attachment point caused by excess material on rocker lever cover interferring with the crankcase breather tube sealing ability.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10163648-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10163648-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10163648","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"X12","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":[]}