{"product_id":"aluminum-coolant-overflow-expansion-tank-for-nissan-240sx-1995-1998-2-4l","title":"Aluminum Coolant Overflow Expansion Tank for Nissan 240SX (1995-1998) 2.4L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Aluminum Coolant Overflow Expansion Tank for 1995-1998 Nissan 240SX (S14)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Aluminum Coolant Overflow Expansion Tank replaces the aged, crack-prone factory plastic reservoir on the 1995-1998 Nissan 240SX to eliminate coolant loss, prevent system pressure leaks, and improve thermal resilience under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Nissan 240SX Plastic Tank Fatigue\u003c\/h3\u003e\n\u003cp\u003eThe OEM blow-molded polyethylene overflow bottle found on the \u003cstrong\u003eS14\u003c\/strong\u003e chassis degrades rapidly due to prolonged exposure to under-hood thermal cycling and ultraviolet rays. Over decades of operation, the polymer loses its plasticizers, turning brittle and yellowed. Repeated heating and cooling cycles alongside cooling-system pressure variances cause hairline stress fractures, particularly around the mounting tabs and inlet\/outlet neck fittings. In high-rpm or drifting applications, these micro-cracks expand, yielding unpressurized coolant weeping, boil-overs, and potential catastrophic overheating of the \u003cstrong\u003eKA24DE\u003c\/strong\u003e cylinder head.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eFabricated from high-grade aluminum sheet, this 1.7-liter replacement tank is built to withstand repeated thermal expansion cycles without structural deformation or seam failure. Each joint is precision TIG welded and pressure tested to help ensure absolute hydraulic integrity under operating temperatures. The unit retains factory volumetric capacity and incorporates precision mounting tabs engineered specifically for the \u003cstrong\u003eS14\u003c\/strong\u003e chassis mounting points. Aluminum provides superior heat rejection compared to virgin plastic, resisting chemical corrosion and preventing ballooning, while the included cap maintains positive retention during track driving.\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;\"\u003e1995-1998 Nissan 240SX\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;\"\u003e\n\u003cstrong\u003eKA24DE\u003c\/strong\u003e \/ \u003cstrong\u003eS14\u003c\/strong\u003e\n\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;\"\u003e155 hp \/ 160 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;\"\u003e21710-65F00 (Factory S14 Coolant Reserve Tank)\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\u003e1995 - 1998 Nissan 240SX Base 2.4L\u003c\/li\u003e\n  \u003cli\u003e1995 - 1998 Nissan 240SX SE 2.4L\u003c\/li\u003e\n  \u003cli\u003e1995 - 1998 Nissan 240SX LE 2.4L\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the S14 240SX?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1995-1998 Nissan 240SX equipped with the \u003cstrong\u003eKA24DE\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eAre modifications required to install this tank?\u003c\/h4\u003e\n\u003cp\u003eNo, it bolts directly into the OEM mounting brackets and utilizes factory coolant overflow hose routing with no cutting or drilling required.\u003c\/p\u003e\n\n\u003ch3\u003eThe Nissan Track-Tested Standard\u003c\/h3\u003e\n\u003cp\u003eChassis engineered during the golden era of JDM rear-wheel-drive platforms require cooling hardware capable of sustaining aggressive high-RPM rev limits and extended lateral loads without fluid failure.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67524669964536,"sku":"DS-EQK14DU3V","price":90.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/aluminum-coolant-overflow-expansion-tank-for-nissan-240sx-1995-1998-2-4l-1.webp?v=1790462564","url":"https:\/\/performancechiptuning.com\/products\/aluminum-coolant-overflow-expansion-tank-for-nissan-240sx-1995-1998-2-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}