{"product_id":"aluminum-coolant-overflow-expansion-tank-for-honda-civic-2017-2021-1-5l","title":"Aluminum Coolant Overflow Expansion Tank for Honda Civic (2017-2021) 1.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eTIG-Welded Aluminum Coolant Expansion Tank for 2017-2021 Honda Civic (FC\/FK)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Aluminum Coolant Overflow Expansion Tank replaces the failure-prone factory molded plastic reservoir on the 2017-2021 Honda Civic to prevent coolant loss and maintain pressurized cooling system integrity under elevated engine bay temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Honda Civic Degas Bottle Degradation\u003c\/h3\u003e\n\u003cp\u003eUnder-hood packaging on the 10th-generation \u003cstrong\u003eFC\/FK\u003c\/strong\u003e chassis positions the factory expansion tank in close proximity to the turbocharger and exhaust manifold. Constant thermal cycling combined with pressure spikes weakens the molded polyethylene reservoir over time. Mechanical stresses degrade the plastic, leading to micro-fissures, warping along the molded seam lines, and embrittlement of the inlet and outlet hose spigots. Left unaddressed, these stress fractures result in pressurized coolant weeping, air ingestion into the closed-loop cooling system, and critical fluid loss that compromises engine thermal management on the \u003cstrong\u003eL15B7\u003c\/strong\u003e platform.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis upgraded expansion reservoir is fabricated from aircraft-grade aluminum alloy, eliminating the plastic failure modes native to the OEM unit. Fully hand TIG-welded along all critical load-bearing seams, the structural design withstands continuous thermal expansion and internal operating pressures without risk of ballooning or seam separation. The precision-machined hose barbs mirror factory hose routing to eliminate hose pinch or bending fatigue, while an included heavy-duty pressure cap maintains accurate release thresholds. Every tank is 100% leak-tested under pressure to guarantee structural containment and consistent cooling loop stability.\u003c\/p\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;\"\u003e2017-2021 Honda Civic\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;\"\u003eL15B7 Turbo \/ FC1, FC2, FK7\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;\"\u003e174-180 hp \/ 162-177 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;\"\u003e19101-5AA-K01, HO3014146\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\u003e2017-2021 Honda Civic Hatchback 1.5L Turbo (LX, EX, EX-L, Sport, Sport Touring)\u003c\/li\u003e\n  \u003cli\u003e2018-2020 Honda Civic Sedan 1.5L Turbo (EX-T, EX-L, Touring)\u003c\/li\u003e\n  \u003cli\u003eNote: Does not fit Civic Type R (OEM 19101-5BF-G01) or Civic Si models\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the FC\/FK Civic?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2017-2021 Honda Civic equipped with the \u003cstrong\u003eL15B7\u003c\/strong\u003e engine utilizing factory tank \u003cstrong\u003e19101-5AA-K01\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch4\u003eDoes installation require modifying factory coolant lines or brackets?\u003c\/h4\u003e\n\u003cp\u003eNo, this unit is engineered for direct bolt-on installation utilizing the factory mounting bracket locations and OEM-diameter coolant hoses.\u003c\/p\u003e\n\n\u003ch3\u003eThe Honda Tuning Caliber\u003c\/h3\u003e\n\u003cp\u003eHigh-output turbocharged JDM powertrains generate extreme under-hood heat loads; upgrading to all-aluminum cooling components ensures your cooling system handles high boost demands reliably on the street and track.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67525239275768,"sku":"DS-E23IHAP7R","price":180.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/aluminum-coolant-overflow-expansion-tank-for-honda-civic-2017-2021-1-5l-1.jpg?v=1790479057","url":"https:\/\/performancechiptuning.com\/es\/products\/aluminum-coolant-overflow-expansion-tank-for-honda-civic-2017-2021-1-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}