{"nhtsa_id":601737,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-08-20","date":"1998-05-05","document_id":"980505980505","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"LOW OIL PRESSURE MAY BE EXPERIENCED ON AN MIDR 06.02.26 \"I\" ENGINE DUE TO IMPROPER SEATING OF THE OIL PRESSURE RELIEF VALVE. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/601737","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MIDLINER","year_from":1998,"year_to":1999,"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":[]}