{"product_id":"marine-head-gasket-for-mercruiser-3-7l-1976-1989-and-460-ford-replaces-chrysler-4417375-mercruiser-27-13709-sierra-18-3878","title":"Sierra Head Gasket 18-3878, Replaces 27-52364, for GM 181 (3.0L) CID Marine Engines","description":"\u003cp\u003eThe Sierra 18-3878 is a head gasket engineered for GM 181 cubic inch (3.0L) CID marine engines. It seals the joint between the cylinder head and engine block, maintaining compression and preventing coolant or oil from leaking into the combustion chamber or crossing between cylinders. This is a common wear item during a top-end rebuild, cylinder head removal, or when addressing a blown gasket that is causing coolant loss, overheating, or compression loss.\u003c\/p\u003e\u003cp\u003eSierra manufactures this gasket to meet or exceed the specifications of the original equipment part it replaces, and it is built to install as a direct fit for GM 181 (3.0L) CID engines. The gasket has a white finish and is sold as a single-piece replacement part.\u003c\/p\u003e\u003cp\u003eEvery Sierra part is backed by Sierra's customer satisfaction warranty, giving boat owners and marine technicians a dependable option when servicing GM 181 (3.0L) powered engines.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-3878\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.51 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282258931\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e GM 181 (3.0L) CID Engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGM 181 (3.0L) CID Engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-52364\u003c\/li\u003e\n\u003cli\u003e27-81084\u003c\/li\u003e\n\u003cli\u003eFI5000204\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engine does the Sierra 18-3878 head gasket fit?\u003c\/strong\u003e The Sierra 18-3878 head gasket is designed for GM 181 cubic inch (3.0L) CID marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM part numbers does 18-3878 replace?\u003c\/strong\u003e Sierra 18-3878 replaces OEM numbers 27-52364, 27-81084, and FI5000204.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3878 head gasket weigh?\u003c\/strong\u003e It weighs 0.51 pounds, as listed for the Sierra 18-3878 head gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-3878 head gasket?\u003c\/strong\u003e The gasket has a white finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3878 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e It is an aftermarket part manufactured by Sierra to meet or exceed the specifications of the original equipment head gasket it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra back the 18-3878 head gasket with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-3878 head gasket is covered under Sierra's customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part number 18-3878?\u003c\/strong\u003e The order includes one Sierra 18-3878 head gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow can I confirm the 18-3878 is the correct head gasket for my engine?\u003c\/strong\u003e Match your engine to a GM 181 (3.0L) CID engine, or cross-check against OEM numbers 27-52364, 27-81084, or FI5000204, which the Sierra 18-3878 replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace a head gasket like the 18-3878?\u003c\/strong\u003e A head gasket such as the 18-3878 is typically replaced during a cylinder head removal, top-end rebuild, or when a failed gasket is causing coolant loss, overheating, or a loss of compression.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988169208027,"sku":"SIE-18-3878","price":42.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3878_lg__29126.1558126214.500.750.jpg?v=1785188121","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-head-gasket-for-mercruiser-3-7l-1976-1989-and-460-ford-replaces-chrysler-4417375-mercruiser-27-13709-sierra-18-3878","provider":"Good Vibes Marina","version":"1.0","type":"link"}