{"nhtsa_id":10093305,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-03-01","date":"2013-10-07","document_id":"02-146-13","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"\"THIS BULLETIN ANNOUNCES THE AVAILABILITY OF REVISED VALVE TRAIN COMPONENTS DEVELOPED TO REDUCE A TAPPING SOUND WHICH MAY BE HEARD COMING FROM THE LEFT-HAND (B2) SIDE OF THE ENGINE WHEN THE ENGINE IS WARM. THIS BULLETIN DOES NOT ADDRESS ANY COLD ENGINE OR START-UP SOUNDS. THE CHANGES CONSIST OF: • DESIGN CHANGE TO THE VALVE ROCKERS • CAMSHAFT PROFILE CHANGE • INCREASED INTAKE VALVE STEM LENGTH (1.65MM LONGER INTAKE, 2.4MM LONGER EXHAUST) IN ADDITION, THE INSULATOR PAD HAS BEEN ELIMINATED FROM THE B2 INTAKE MANIFOLD PROTECTOR.\"","document":null,"url":"https://open.wenmarpro.com/bulletins/10093305","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"SUBARU","model":"IMPREZA","year_from":2012,"year_to":2013,"match":"exact","vehicle_ids":["2012_subaru_impreza","2013_subaru_impreza"]},{"make":"SUBARU","model":"XV CROSSTREK","year_from":2013,"year_to":2013,"match":"exact","vehicle_ids":["2013_subaru_xv-crosstrek"]}],"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":[]}