{"product_id":"performance-water-pump-kit-for-subaru-forester-1998-2005-2-5l","title":"Performance Water Pump Kit for Subaru Forester (1998-2005) 2.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Water Pump Kit for 1998-2005 Subaru Forester (SF \/ SG)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Water Pump Kit replaces the factory timing-belt-driven water pump and thermostat on the 1998-2005 Forester to maintain critical coolant flow, stabilize operating temperatures, and protect against catastrophic overheating.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Subaru Forester Cooling System Vulnerabilities\u003c\/h3\u003e\n\u003cp\u003eFactory cooling systems on the naturally aspirated 2.5L \u003cstrong\u003eEJ25D\u003c\/strong\u003e and \u003cstrong\u003eEJ251 \/ EJ253\u003c\/strong\u003e boxer engines are notoriously sensitive to thermal cycling and localized cavitation. The stock cast aluminum water pump housings and internal stamped impellers frequently suffer from unitized bearing degradation, shaft play, and internal seal weeping around timing belt service intervals. Coupled with a fatigued, sticking factory wax-pellet thermostat, coolant flow drops below required threshold rates. In a horizontally opposed boxer architecture, stagnant coolant flow rapidly creates localized cylinder hotspotting, accelerating head gasket breach—a known operational vulnerability across high-mileage \u003cstrong\u003eSF\u003c\/strong\u003e and \u003cstrong\u003eSG\u003c\/strong\u003e chassis.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive cooling refresh kit pairs a heavy-duty mechanical water pump assembly with a calibrated mechanical engine coolant thermostat to restore exact volumetric flow rates. Engineered with a precision-machined OE-profile housing and a high-efficiency impeller, this unit delivers consistent, cavitation-free circulation across the entire rev band. The assembly integrates an OE-grade carbon-ceramic mechanical face seal and a reinforced sealed bearing to handle sustained timing belt tension loads without deflection. Bundled with direct-matched synthetic elastomer gaskets, this assembly eliminates cold-start leaks and restores thermal equilibrium across both cylinder banks, protecting critical cylinder head sealing surfaces.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Mechanical Water Pump Assembly\u003c\/li\u003e\n  \u003cli\u003e1 Water Pump Gasket\u003c\/li\u003e\n  \u003cli\u003e1 Engine Coolant Thermostat\u003c\/li\u003e\n  \u003cli\u003e1 Thermostat Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100% style=\" border-collapse: collapse border: solid font-size: min-width:\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1998-2005 Subaru Forester\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eEJ25D, EJ251, EJ253 \/ SF, SG\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e165 hp \/ 166 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003e21111AA000\u003c\/strong\u003e, \u003cstrong\u003e21111AA001\u003c\/strong\u003e, \u003cstrong\u003e21111AA002\u003c\/strong\u003e, \u003cstrong\u003e21111AA003\u003c\/strong\u003e, \u003cstrong\u003e21111AA004\u003c\/strong\u003e, \u003cstrong\u003e21111AA005\u003c\/strong\u003e, \u003cstrong\u003e21111AA006\u003c\/strong\u003e, \u003cstrong\u003e21111AA007\u003c\/strong\u003e, \u003cstrong\u003e21111AA011\u003c\/strong\u003e, \u003cstrong\u003e21111AA110\u003c\/strong\u003e, \u003cstrong\u003e21200AA071\u003c\/strong\u003e, \u003cstrong\u003e21200AA072\u003c\/strong\u003e, AW9223, WP777, US9223, CP9223, NP1487, PA786, VKPC99407\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSubaru Forester 2.5L Gas DOHC Naturally Aspirated — 1998\u003c\/li\u003e\n  \u003cli\u003eSubaru Forester 2.5L Gas SOHC Naturally Aspirated — 1999-2005\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the SF and SG Chassis Forester?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1998-2005 Subaru Forester equipped with naturally aspirated \u003cstrong\u003eEJ25\u003c\/strong\u003e engines. \u003cstrong\u003eNote: For naturally aspirated engines only — not compatible with turbocharged WRX, STI, or Legacy GT models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to bleed air pockets from the cooling system after installation?\u003c\/h4\u003e\n\u003cp\u003eYes, the Subaru horizontally opposed boxer layout traps air easily in the heater core and upper crossover pipes, requiring a thorough burping and vacuum-fill procedure to prevent air-lock overheating.\u003c\/p\u003e\n\n\u003ch3\u003eThe Subaru Boxer Standard\u003c\/h3\u003e\n\u003cp\u003ePreserving the durability and power of high-revving boxer platforms requires uncompromising thermal management that stands up to sustained load, demanding driving cycles, and rugged trail usage.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67923242156280,"sku":"DS-EVXPBODOU","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-water-pump-kit-for-subaru-forester-1998-2005-2-5l-1.jpg?v=1793555614","url":"https:\/\/performancechiptuning.com\/es\/products\/performance-water-pump-kit-for-subaru-forester-1998-2005-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}