{"nhtsa_id":10030387,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-09-28","date":"2009-06-17","document_id":"SP-P10681","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","mfr_system":null,"summary":"MACK TRUCK: UNIT INJECTOR SLEEVE, NBR COMBUSTION WASHER AND UNIT INJECTOR YOKE UPGRADE; CERTAIN ENGINES MAY EXPERIENCE COMBUSTION LEAKAGE AT THE UNIT INJECTOR SLEEVE. MACK TRUCKS, INC HAS AUTHORIZED UPGRADING OF THESE ENGINES WITH UNIT INJECTOR SLEEVES, NBR COMBUSTION WASHERS AND UNIT INJECTOR HOLD DOWN YOKES. NO MODEL OR MODEL YEARS LISTED. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10030387","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MACK","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":[]}