{"product_id":"performance-water-pump-kit-for-buick-rainier-2007-5-3l","title":"Performance Water Pump Kit for Buick Rainier (2007) 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Efficiency Water Pump Kit for Buick Rainier (GMT360)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Water Pump Kit circulates engine coolant through the Buick Rainier cooling passages to stabilize operating temperatures and prevent thermal breakdown under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Buick Rainier Bearing and Seal Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory cooling systems on the \u003cstrong\u003eGMT360\u003c\/strong\u003e platform suffer from premature water pump shaft seal degradation and bearing play after years of high-duty thermal cycles. The aluminum-block \u003cstrong\u003eLH6\u003c\/strong\u003e 5.3L V8 generates substantial block heat; once factory composite impellers or mechanical shaft seals wear, weep-hole fluid discharge, bearing wobble, and cavitation occur. Left unchecked, this causes rapid coolant loss, localized hot spots, and warped cylinder heads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement assembly resolves OEM failure modes by pairing a precision-cast aluminum housing with a high-flow impeller and heavy-duty unitized shaft bearings. Designed to meet or exceed OEM fluid flow targets, this kit stabilizes cooling loop pressures and prevents coolant bypass leakage. Integrated with a fresh thermostat and precision-cut sealing gaskets, it maintains strict 187°F–195°F thermal management even under maximum towing stress.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Engine Water Pump\u003c\/li\u003e\n  \u003cli\u003e1 Thermostat Housing\u003c\/li\u003e\n  \u003cli\u003e1 Thermostat\u003c\/li\u003e\n  \u003cli\u003e2 Rectangular Gaskets\u003c\/li\u003e\n  \u003cli\u003e1 Oval Gasket\u003c\/li\u003e\n  \u003cli\u003e2 Mounting Bolts\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 stress\" 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;\"\u003eBuick Rainier\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;\"\u003eLH6 5.3L V8 \/ GMT360\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;\"\u003e302 hp \/ 330 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;\"\u003e12681417, 12600767, AW6009\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\u003e2007 Buick Rainier CXL 5.3L V8 (LH6)\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 GMT360 Rainier?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2007 Buick Rainier equipped with the \u003cstrong\u003eLH6\u003c\/strong\u003e 5.3L V8 engine. It does not fit models equipped with the 4.2L inline-six (LL8) powerplant.\u003c\/p\u003e\n\n\u003ch4\u003eWhat torque specification should be used during installation?\u003c\/h4\u003e\n\u003cp\u003eTorque the water pump mounting fasteners evenly in two passes to vehicle manufacturer specifications (11 lb-ft on the first pass, 22 lb-ft on the final pass) to prevent gasket pinching and housing distortion.\u003c\/p\u003e\n\n\u003ch3\u003eThe Buick Durability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the long haul, this assembly delivers the cooling performance necessary to handle continuous hauling loads and steep grade climbs without elevated cylinder head temperatures.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67545124700408,"sku":"DS-E8FP8GR72","price":108.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-water-pump-kit-for-buick-rainier-2007-5-3l-1.jpg?v=1790717282","url":"https:\/\/performancechiptuning.com\/es\/products\/performance-water-pump-kit-for-buick-rainier-2007-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}