{"product_id":"bcbc-vs-840-engine-valve-spring","title":"BCBC VS-840 Engine Valve Spring","description":"\u003ch2\u003eEngine Valve Spring for Ford and Mercury Applications\u003c\/h2\u003e\u003cp\u003eMelling VS-840 is a standard replacement engine valve spring built for a wide range of Ford, Mercury, and Lincoln applications. It is a single-spring design made from corrosion-resistant steel and specified for stock use with the listed camshaft and engine combinations.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSingle spring design for stock replacement use\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant steel construction\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for common service needs\u003c\/li\u003e\n\u003cli\u003eOpen pressure rated at 229.0\u003c\/li\u003e\n\u003cli\u003eFits applications with 0.99 inside diameter and 1.39 outside diameter\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Fitment and Application\u003c\/h2\u003e\u003cp\u003eThis Melling valve spring, part number VS-840, is listed for a broad range of classic Ford, Mercury, and Lincoln engines from 1968-1989. Fitment includes stock applications such as Fits 1975-1989 Ford E-250 Econoline Club Wagon, N\/A; Fits 1975-1989 Ford E-350 Econoline, N\/A; Fits 1983-1989 Ford F-250, N\/A; Fits 1972-1978 Ford LTD, N\/A; and Fits 1968-1971 Lincoln Mark III, N\/A. Many listings note use with the SYB-19 camshaft or exclusions for police, Cobra Jet, and Super Cobra Jet engines.\u003c\/p\u003e\u003ch2\u003eWhat This Part Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWeak or worn valve spring tension\u003c\/li\u003e\n\u003cli\u003eValve control issues in stock engine setups\u003c\/li\u003e\n\u003cli\u003eReplacement needs during camshaft service\u003c\/li\u003e\n\u003cli\u003eSpring fatigue from long-term engine use\u003c\/li\u003e\n\u003cli\u003eIncorrect spring specification for listed applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the listed application notes before installation, especially the SYB-19 camshaft requirement and the exclusions for police, Cobra Jet, and Super Cobra Jet engines. Confirm coil bind height, open height, and spring dimensions against the cylinder head and valvetrain setup before assembly. Part number VS-840 should be matched to the exact engine configuration shown in the fitment data.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eMelling offers valve springs across standard, mid-range, heavy-duty, and race-ready categories, with multiple spring designs available for different valvetrain requirements. Part number VS-840 is part of the Stock line and is built as a standard replacement component.\u003c\/p\u003e","brand":"BCBC","offers":[{"title":"Default Title","offer_id":53725650649269,"sku":"BCBC-VS-840","price":13.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/ML_VS840_Ang.jpg?v=1794205756","url":"https:\/\/www.partcatalog.com\/products\/bcbc-vs-840-engine-valve-spring","provider":"PartCatalog","version":"1.0","type":"link"}