{"product_id":"t-shirt-27","title":"T-Shirt","description":"The Mini Mania GWP134 is a high-capacity water pump engineered to improve cooling performance in Classic Mini vehicles. This pump features a significantly larger impeller, which protrudes slightly more than 1\/2\" (14.03mm) into the engine block, facilitating increased coolant flow. The pump's body is constructed from aluminum, while the impeller is made of long-lasting cast iron, offering superior durability compared to many aftermarket options that use stamped steel. The GWP134 also includes a bypass hose take-off for integrated system compatibility.\n\nThis water pump is designed to fit all 1275cc blocks and all small bore blocks. However, it is specifically noted that the pump will not fit early 850\/997cc units. For these earlier blocks, modifications such as relieving corrosion or slightly altering the liner wall and impeller may be necessary to ensure proper clearance. It is recommended to test pump clearance by spinning it loosely without the gasket before final installation.\n\nThe high-capacity design of the GWP134 helps reduce cavitation within the water jacket, especially at high RPMs, by circulating a greater volume of coolant. For optimal performance, a large diameter water pump pulley (CAM6408), originally fitted to Cooper S and A-Plus engines, can be used, though clearance checks between the pulley and the cylinder head are essential, particularly if the head has been significantly machined. Small bore engines with 12G940 heads may require modification to the top edge of the water pump or the head itself to maintain a proper sealing gap.","brand":"Mini Mania","offers":[{"title":"Default Title","offer_id":52689165615416,"sku":"GWP134","price":19.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687391093.jpg?v=1784902839","url":"https:\/\/store.motormia.co\/products\/t-shirt-27","provider":"MOTORMIA","version":"1.0","type":"link"}