{"product_id":"radiator-for-chevrolet-blazer-1987-1991-5-7l","title":"Radiator for Chevrolet Blazer (1987-1991) 5.7L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty 3-Row Aluminum Radiator for 1987-1991 Chevrolet Blazer (K5)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 3-row aluminum crossflow radiator replaces the failure-prone factory heat exchanger on the 1987-1991 Chevrolet Blazer to maximize thermal dissipation, lower operating temperatures, and prevent chronic engine overheating under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Blazer Cooling Deficiencies\u003c\/h3\u003e\n\u003cp\u003eFactory cooling systems on the squarebody \u003cstrong\u003eK5\u003c\/strong\u003e Blazer rely on aging copper-brass or crimped composite end tanks that deteriorate after decades of thermal cycling. Torsional chassis flex during off-road operation stresses the factory core seams, while internal corrosion and mineral scale build-up severely reduce heat rejection. Under sustained load—such as trailer towing or low-speed crawling—the OEM cooling capacity quickly becomes overwhelmed, subjecting the \u003cstrong\u003e5.7L LO5 SBC\u003c\/strong\u003e engine to chronic heat soak and elevated coolant temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis cooling assembly utilizes a premium all-aluminum 3-row crossflow core measuring 28.23 x 18.82 x 2.44 inches, precision TIG-welded to heavy-gauge aluminum tanks to eliminate leaky mechanically crimped joints. Louvered multi-fin engineering dramatically expands surface-area thermal contact compared to stock radiators, speeding up convection under low airflow conditions. Designed with an integrated transmission fluid cooler, 1.50-inch inlet\/outlet bungs, and an included pressure-rated radiator cap, this drop-in replacement ensures optimal drivetrain fluid stabilization and robust cooling efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x 3-Row Full Aluminum Crossflow Radiator\u003c\/li\u003e\n  \u003cli\u003e1x Radiator Cap\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: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\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;\"\u003e1987-1991 Chevrolet Blazer\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;\"\u003e5.7L LO5 TBI Small Block Chevy \/ K5 (V1500)\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;\"\u003e210 hp \/ 300 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;\"\u003eN\/A\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\u003e1987-1991 Chevrolet K5 Blazer 5.7L V8\u003c\/li\u003e\n  \u003cli\u003e1987-1991 Chevrolet V1500 Blazer 5.7L V8\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 K5 Blazer?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1987-1991 Chevrolet Blazer equipped with the \u003cstrong\u003e5.7L LO5\u003c\/strong\u003e V8 engine.\u003c\/p\u003e\n\n\u003ch4\u003eDoes this radiator accommodate automatic transmission lines?\u003c\/h4\u003e\n\u003cp\u003eYes, it features an integrated internal transmission oil cooler engineered to plumb directly into factory automatic transmission lines.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Truck Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for demanding trails and heavy hauling, the \u003cstrong\u003eK5\u003c\/strong\u003e Blazer requires heavy-duty thermal management. Upgrading to a rigid, fully TIG-welded all-aluminum core provides the extended durability and thermal capacity needed to protect your Small Block Chevy through extreme towing and harsh off-road duty.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67563021828344,"sku":"DS-EGOGIKTSB","price":183.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/radiator-for-chevrolet-blazer-1987-1991-5-7l-1.jpg?v=1790999414","url":"https:\/\/performancechiptuning.com\/products\/radiator-for-chevrolet-blazer-1987-1991-5-7l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}