{"product_id":"sierra-18-0347-valve-cover-gasket-for-mercruiser-470-3-7l-4-cyl-replaces-27-52145-omc-3852693","title":"Sierra Valve Stem Seals (8) 18-0347, Replaces Mercruiser 27-52145, for 4 Cyl. 3.7L Mercruiser 470","description":"\u003cp\u003eThe Sierra 18-0347 is a set of 8 valve stem seals engineered to restore proper oil control at the valve guides on the 4 cyl. 3.7L Mercruiser 470 engine. Valve stem seals wear out over time from heat cycling and contact with the valve stem, letting oil seep down into the combustion chamber or exhaust port; a worn set is a common cause of blue exhaust smoke, fouled plugs, and gradual oil consumption. Sierra manufactures this seal set to meet or exceed original equipment quality, so it installs the same way the original seals did and restores factory sealing performance.\u003c\/p\u003e\u003cp\u003eThis is a set of 8 seals, enough for a complete single-engine valve stem seal replacement job on the applicable Mercruiser 470 engine. Each unit weighs 0.19 pounds. Sierra part number 18-0347 cross-references directly to the Mercury Marine, OMC, GLM, Mallory, and Volvo Penta part numbers listed below, so it is a straightforward like-for-like replacement whether the engine currently carries an original Mercury\/OMC seal or a prior aftermarket equivalent.\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 18-0347\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Valve Stem Seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 8 seals per set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.19 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282257347\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e 4 cyl. 3.7L Mercruiser 470\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mercury Marine 27-52145, 27-806452, 27-34041; OMC 913277, 912981, 3852693; Volvo Penta 3852693; GLM 32210; Mallory 9-61317\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e4 cyl. 3.7L Mercruiser 470\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 32210\u003c\/li\u003e\n\u003cli\u003eMallory 9-61317\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-52145\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-806452\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-34041\u003c\/li\u003e\n\u003cli\u003eOMC 913277\u003c\/li\u003e\n\u003cli\u003eOMC 912981\u003c\/li\u003e\n\u003cli\u003eOMC 3852693\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 3852693\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0347 valve stem seal set include?\u003c\/strong\u003e The Sierra 18-0347 set includes 8 valve stem seals, enough for a full single-engine replacement on the applicable 4 cyl. 3.7L Mercruiser 470 engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engine does part number 18-0347 fit?\u003c\/strong\u003e Sierra 18-0347 is built for the 4 cyl. 3.7L Mercruiser 470 engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-0347 the same as Mercury Marine 27-52145?\u003c\/strong\u003e Yes, Sierra 18-0347 directly cross-references to Mercury Marine 27-52145, along with Mercury Marine 27-806452 and 27-34041, and installs as a direct replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-0347 replace OMC valve stem seals?\u003c\/strong\u003e Yes, Sierra 18-0347 cross-references to OMC part numbers 913277, 912981, and 3852693.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this compatible with Volvo Penta engines?\u003c\/strong\u003e Sierra 18-0347 cross-references to Volvo Penta part number 3852693.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in the 18-0347 set?\u003c\/strong\u003e The set contains 8 valve stem seals, matching a full complement for the 4 cyl. 3.7L Mercruiser 470 engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0347 seal set weigh?\u003c\/strong\u003e The set weighs 0.19 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the symptoms of worn valve stem seals that 18-0347 addresses?\u003c\/strong\u003e Worn valve stem seals commonly cause blue exhaust smoke, fouled spark plugs, and gradual oil consumption; replacing them with the Sierra 18-0347 set restores proper oil control at the valve guides.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-0347 an OEM part or an aftermarket replacement?\u003c\/strong\u003e Sierra 18-0347 is an aftermarket part manufactured to meet or exceed original equipment quality, cross-referenced to the Mercury Marine, OMC, and Volvo Penta OEM numbers it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-0347 also cross-reference to GLM or Mallory part numbers?\u003c\/strong\u003e Yes, Sierra 18-0347 cross-references to GLM 32210 and Mallory 9-61317.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988068610267,"sku":"SIE-18-0347","price":93.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0347_lg__66533.1558118554.500.750.jpg?v=1785188407","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0347-valve-cover-gasket-for-mercruiser-470-3-7l-4-cyl-replaces-27-52145-omc-3852693","provider":"Good Vibes Marina","version":"1.0","type":"link"}