{"nhtsa_id":10043946,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2012-05-02","date":"2012-03-23","document_id":"TIBU-6580","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"CATERPILLAR: CERTAIN REMANUFACTURED CYLINDER PACKS FOR 3400 SERIES ENGINES CONTAIN IMPROPERLY INSTALLED PISTON RINGS. *KB","document":null,"url":"https://open.wenmarpro.com/bulletins/10043946","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CATERPILLAR","model":"CATERPILLAR","year_from":null,"year_to":null,"match":"exact","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":[]}