{"nhtsa_id":10030390,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-09-28","date":"2009-06-19","document_id":"SP-10682","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","mfr_system":null,"summary":"MACK TRUCK: NBR COMBUSTION WASHER AND UNIT INJECTOR YOKE UPGRADE. CERTAIN MACK MP8 ENGINES MAY EXPERIENCE COMBUSTION LEAKAGE AT THE UNIT INJECTOR SLEEVE. BECAUSE OF THIS MACK TRUCKS, INC. HAS AUTHORIZED UPGRADING THESE ENGINES WITH NBR COMBUSTION WASHERS AND UNIT INJECTOR HOLD DOWN YOKES. NO MODEL OR MODEL YEARS LISTED. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10030390","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":[]}