{"product_id":"heavy-duty-aluminum-expansion-tank-kit","title":"Heavy Duty Aluminum Expansion Tank Kit","description":"BMWs are notorious for cooling system problems, often leading to severe engine damage. The coolant expansion tank, a critical component for holding pressurized coolant, is a frequent culprit. Unfortunately, the factory E46 M3 expansion tank is made of plastic, which degrades over time from heat, pressure, and chemicals, eventually leading to failure.\n\nEngineered by BMW enthusiasts, this heavy-duty expansion tank kit is designed as a lasting solution. It is crafted from durable 5052 TIG-welded aluminum, capable of withstanding high temperatures and pressures without degrading. This eliminates the risk of cracking or leaking associated with the fragile OEM plastic tank.\n\nTo ensure a precise fit, the tank was designed using advanced 3D CAD modeling. All fittings are precision-machined for a secure seal with factory hose connections. The tank retains the factory coolant capacity and features a laser-cut logo plate for an accurate fill level indicator. Internal baffles prevent fluid cavitation and air pockets, avoiding false coolant level readings during spirited driving. The kit includes a silicone overflow hose, a coolant level sensor, and an OE expansion tank cap, providing a complete cooling upgrade.","brand":"Turner Motorsport","offers":[{"title":"Default Title","offer_id":52689477239096,"sku":"008682LA02","price":340.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687752569.png?v=1784906950","url":"https:\/\/store.motormia.co\/products\/heavy-duty-aluminum-expansion-tank-kit","provider":"MOTORMIA","version":"1.0","type":"link"}