{"product_id":"dorman-m39566-brake-master-cylinder","title":"Dorman M39566 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Buick, Cadillac, and Oldsmobile\u003c\/h2\u003e\u003cp\u003eThe Dorman M39566 brake master cylinder is engineered to restore proper brake hydraulics in select Buick, Cadillac, and Oldsmobile models. Designed with durable cast iron and a built-in reservoir, this master cylinder ensures consistent brake fluid delivery for safe stopping performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from cast iron for strength and durability\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for brake fluid storage\u003c\/li\u003e\n\u003cli\u003eMaster cylinder bore diameter: 40 mm \u0026amp; 1-1\/8 inch\u003c\/li\u003e\n\u003cli\u003eFour outlets with specific thread sizes for rearward and secondary connections\u003c\/li\u003e\n\u003cli\u003eCompatible with Buick DeVille, Cadillac Eldorado, Fleetwood, Reatta, Riviera, Seville, and Oldsmobile Toronado\u003c\/li\u003e\n\u003cli\u003ePart number M39566 for precise replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Specifications\u003c\/h2\u003e\u003cp\u003eThis Dorman brake master cylinder features a 40 mm (1-1\/8 inch) bore diameter, providing the correct hydraulic pressure for the braking systems in the listed vehicles. The cast iron construction offers resistance to wear and heat, essential for reliable brake performance. The included reservoir allows for proper brake fluid containment and circulation. It has four outlets, with rearward outlet sizes of M11 x 1.5 and M16 x 1.5, and secondary outlet thread diameters of M12 x 1.0 and M16 x 1.5, ensuring compatibility with the brake lines on Buick DeVille, Cadillac Eldorado, and other specified models.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake pressure in vehicles experiencing spongy or unresponsive brakes\u003c\/li\u003e\n\u003cli\u003eReplaces leaking or damaged master cylinders causing brake fluid loss\u003c\/li\u003e\n\u003cli\u003eAddresses brake pedal sinking or failure to maintain pressure\u003c\/li\u003e\n\u003cli\u003eSolves issues related to inconsistent brake fluid flow in Buick, Cadillac, and Oldsmobile models\u003c\/li\u003e\n\u003cli\u003eEnsures proper hydraulic function for safe braking performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman M39566 brake master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic pressure. Mounting hardware is not included, so retain original fasteners or acquire appropriate replacements. Verify thread sizes on brake lines to match the specified outlet dimensions. It is recommended to inspect related brake components during installation for wear or damage.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures this brake master cylinder to meet or exceed OEM standards for fit and function. The cast iron material and precise bore diameter contribute to long service life. While mounting hardware is not included, the product is backed by Dorman's quality control processes. Please consult Dorman's warranty policy for specific coverage details.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43789343916213,"sku":"BKKX-M39566","price":99.43,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M39566_Fro.jpg?v=1774997482","url":"https:\/\/www.partcatalog.com\/products\/dorman-m39566-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}