{"nhtsa_id":6092437,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-12-07","date":"1998-07-01","document_id":"SB9801C001","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"THE ISUZU ENGINEERING DEPARTMENT AND AIPDN HAVE DISCOVERED THAT COMMERCIAL VEHICLES (CV) EQUIPPED WITH 4BD2-TC ENGINES HAVE INCORRECT PISTON RING APPLICATIONS INCORPORATED INTO SOME 4BD2-TC LINER SETS.","document":null,"url":"https://open.wenmarpro.com/bulletins/6092437","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"ISUZU","model":"CV","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":[]}