{"nhtsa_id":10004649,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2003-12-30","date":"2003-09-24","document_id":"563","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"ON CERTAIN MODEL CHASSIS EQUIPPED WITH AN ASET AC ENGINE PRIOR TO ENGINE SERIAL NO. 3O0297, THE MOUNTING BOLTS THAT SECURE THE VTG ACTUATOR FLANGE TO THE TURBINE HOUSING ON THE VARIABLE TURBINE GEOMETRY (VTG) TURBOCHARGER MAY LOOSEN IN SERVICE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10004649","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CH","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"MACK","model":"CX","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":[]}