{"product_id":"dorman-904-858-vacuum-pump","title":"Dorman 904-858 Vacuum Pump","description":"\u003ch2\u003eReliable Mechanical Vacuum Pump for Ford and Lincoln Vehicles\u003c\/h2\u003e\u003cp\u003eThe Dorman 904-858 vacuum pump is designed to support emission control systems in select Ford and Lincoln models. Engineered with an aluminum housing and gear drive system, this mechanical vacuum pump ensures consistent performance for vehicles like the Ford F-150 and Lincoln Navigator.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMechanical vacuum pump with gear drive system\u003c\/li\u003e\n\u003cli\u003eAluminum housing for durability and heat resistance\u003c\/li\u003e\n\u003cli\u003eIncludes a gasket or seal for secure installation\u003c\/li\u003e\n\u003cli\u003eSingle vacuum port with barbed connector for easy hose attachment\u003c\/li\u003e\n\u003cli\u003eRelief valve integrated for pressure regulation\u003c\/li\u003e\n\u003cli\u003eCompatible with Ford Expedition, F-150, Lincoln Navigator, and Transit series (150, 250, 350, 350 HD)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe Dorman 904-858 vacuum pump features a 0.49-inch inlet port diameter and a 0.23-inch outlet port outside diameter, optimized for efficient vacuum flow. The pump operates via a gear drive system, eliminating the need for a pulley, which is not included. Its aluminum housing provides strength and resistance to corrosion, while the included gasket or seal ensures a tight fit to prevent leaks. The pump has one vacuum port with a barbed connector, facilitating secure hose connections. Additionally, the built-in relief valve helps maintain proper vacuum pressure, protecting the system from overpressure conditions.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis vacuum pump is compatible with a range of Ford and Lincoln vehicles, including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFord Expedition\u003c\/li\u003e\n\u003cli\u003eFord F-150\u003c\/li\u003e\n\u003cli\u003eLincoln Navigator\u003c\/li\u003e\n\u003cli\u003eFord Transit-150, Transit-250, Transit-350, and Transit-350 HD\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt is designed to support emission control and vacuum system functions, ensuring proper operation of components that rely on vacuum pressure.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by the Dorman 904-858 Vacuum Pump\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLoss of vacuum pressure affecting brake booster performance\u003c\/li\u003e\n\u003cli\u003eEmission control system malfunctions due to vacuum leaks\u003c\/li\u003e\n\u003cli\u003eEngine performance issues related to vacuum-operated components\u003c\/li\u003e\n\u003cli\u003eRelief valve failure causing pressure irregularities\u003c\/li\u003e\n\u003cli\u003eWear or damage to original vacuum pump components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dorman 904-858 vacuum pump, ensure the gasket or seal is properly seated to prevent leaks. Since mounting hardware and pulley are not included, reuse existing components if they are in good condition or source replacements separately. Verify that the gear drive system aligns correctly with the engine drive gear to avoid premature wear. Inspect vacuum hoses and connectors for damage and replace as necessary to maintain system integrity.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman vacuum pumps are manufactured to meet or exceed OEM specifications, providing reliable performance for emission control and vacuum system applications. This product includes a gasket or seal to support proper installation. While specific warranty details are not provided here, Dorman typically offers limited warranties on their parts to ensure customer confidence and product durability.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":51936839336117,"sku":"BKKY-904-858","price":148.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_904858_Bac.jpg?v=1775011881","url":"https:\/\/www.partcatalog.com\/products\/dorman-904-858-vacuum-pump","provider":"PartCatalog","version":"1.0","type":"link"}