{"nhtsa_id":10135094,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-04-30","date":"2018-03-29","document_id":"18-03-29 RETURN","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Federal-Mogul Motorparts LLC is requesting the return of certain Fel Pro Small Block Chevy Head Bolt Sets manufactured as replacement parts. Two bolts in the affected sets are too short, and will barely engage the cylinder block thread upon installation. The bolts cannot be torqued to specification, so there is little likelihood an engine builder or technician could assemble the cylinder head on the block with this length bolt.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10135094-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10135094-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10135094","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"CHEVROLET","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":[]}