{"product_id":"performance-radiator-for-mercedes-benz-s-class-1986-1991-3-0l-3-4l","title":"Performance Radiator for Mercedes Benz S-Class (1986-1991) 3.0L 3.4L","description":"\u003ch2\u003eAll-Aluminum Performance Radiator for 1986-1991 Mercedes Benz S-Class\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Radiator replaces failure-prone OEM composite radiators on the 1986-1991 S-Class to maximize heat dissipation and prevent severe engine overheating.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz S-Class Cooling Weakness\u003c\/h3\u003e\n\u003cp\u003eFactory cooling systems in the \u003cstrong\u003eW126\u003c\/strong\u003e chassis rely on radiator cores sealed to brittle plastic end tanks via crimped rubber gaskets. Decades of cyclic heat fatigue, pressurized coolant cycles, and thermal shock cause these plastic necks to embrittle, hairline crack, or snap outright at the upper hose connection. On the inline-six \u003cstrong\u003eOM603\u003c\/strong\u003e turbodiesel engines, cooling system compromise is catastrophic; localized boiling and cavitation rapidly lead to warped aluminum cylinder heads and blown head gaskets.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement unit eliminates structural failure points by pairing an all-aluminum tube-and-fin core with heavy-gauge aluminum end tanks, fully TIG-welded to eliminate leak-prone crimp seals. The high-efficiency core design increases secondary surface fin area to accelerate heat rejection under sustained load. Furnace-brazed aluminum passages provide superior thermal transfer compared to aged, scaled factory components while maintaining factory bracket locations, hose barbs, and fan shroud clearances.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\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;\"\u003e1986-1991 Mercedes Benz S-Class\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;\"\u003eOM603 \/ W126, V126\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;\"\u003e134-148 hp \/ 201-228 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\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1986-1987 Mercedes Benz S-Class 300SDL 3.0L\u003c\/li\u003e\n  \u003cli\u003e1990-1991 Mercedes Benz S-Class 350SD 3.4L\u003c\/li\u003e\n  \u003cli\u003e1990-1991 Mercedes Benz S-Class 350SDL 3.4L\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the W126 S-Class?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 1986-1991 Mercedes Benz S-Class equipped with the \u003cstrong\u003eOM603\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this require cutting or custom mounting brackets?\u003c\/strong\u003e\u003cbr\u003e No, it features direct bolt-in fitment designed to align with factory chassis isolators and OEM cooling hoses.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Preservation Standard\u003c\/h3\u003e\n\u003cp\u003ePreserving classic German engineering requires thermal stability that matches rigorous autobahn specifications. Precision TIG construction ensures dependable cooling performance, protecting high-mileage diesel powertrains from heat-induced failure while maintaining flawless factory engine-bay integration.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50593809236216,"sku":"DS-EDMSZMCVO","price":194.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-radiator-for-mercedes-benz-s-class-1986-1991-3-0l-3-4l-1.jpg?v=1790051778","url":"https:\/\/performancechiptuning.com\/fr\/products\/performance-radiator-for-mercedes-benz-s-class-1986-1991-3-0l-3-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}