{"nhtsa_id":10168148,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-11-25","date":"2019-10-08","document_id":"ATC2163","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This Account Team Coverage is being issued to address life cylinder liner O-ring failures (PN 3696801) in certain X12 CM2350 X119B engines. Normal temperature at the liner may result in liner O-ring deterioration causing an external coolant leak. This field action provides authorization for certified repair locations to replace the cylinder liner O-rings with new O-rings that have increased temperature capability and margin for potential longer-term durability.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10168148-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10168148-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10168148","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":[]}