{"product_id":"dorman-w37664-drum-brake-wheel-cylinder","title":"Dorman W37664 Drum Brake Wheel Cylinder - Rear","description":"\u003ch2\u003eReliable Drum Brake Wheel Cylinder for Chevrolet, Geo, and Isuzu\u003c\/h2\u003e\u003cp\u003eThe Dorman W37664 drum brake wheel cylinder is engineered to restore proper braking function in select Chevrolet, Geo, and Isuzu vehicles. Designed with durable cast iron construction and precise dimensions, this wheel cylinder ensures consistent hydraulic pressure for safe and effective drum brake operation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIncludes bleeder screw for easy brake fluid bleeding\u003c\/li\u003e\n\u003cli\u003eBrake line inlet thread diameter: 0.437 inches\u003c\/li\u003e\n\u003cli\u003eBrake component inlet thread size: 7\/16-24\u003c\/li\u003e\n\u003cli\u003eBore diameter of 0.688 inches for accurate fitment\u003c\/li\u003e\n\u003cli\u003eConstructed from cast iron for strength and durability\u003c\/li\u003e\n\u003cli\u003ePackage contains one drum brake wheel cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDurable Construction and Precise Specifications\u003c\/h2\u003e\u003cp\u003eThe Dorman W37664 wheel cylinder features a cast iron casting material that provides long-lasting durability under demanding braking conditions. Its bore diameter of 0.688 inches and brake line inlet thread diameter of 0.437 inches ensure compatibility with the hydraulic brake systems of Chevrolet I-Mark, Geo Spectrum, and Isuzu models. The included bleeder screw simplifies maintenance by allowing efficient removal of air from the brake lines, although a bleeder screw cap is not included. This part is designed to meet the exact thread size of 7\/16-24 for secure brake line connections.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis drum brake wheel cylinder is compatible with the following vehicles:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eChevrolet I-Mark\u003c\/li\u003e\n\u003cli\u003eGeo Spectrum\u003c\/li\u003e\n\u003cli\u003eIsuzu models with matching brake specifications\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt is intended for use in drum brake hydraulic systems to replace worn or leaking wheel cylinders, restoring proper brake function and safety.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Wheel Cylinder\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake fluid leaks from the wheel cylinder\u003c\/li\u003e\n\u003cli\u003eSpongy or unresponsive brake pedal\u003c\/li\u003e\n\u003cli\u003eUneven brake application or reduced braking power\u003c\/li\u003e\n\u003cli\u003eCorroded or damaged cylinder bore affecting brake performance\u003c\/li\u003e\n\u003cli\u003eBrake drag caused by sticking pistons within the cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dorman W37664 drum brake wheel cylinder, ensure the brake system is properly bled using the included bleeder screw to remove air pockets. Verify thread compatibility with your vehicle’s brake lines (7\/16-24 thread size) before installation. Inspect brake shoes and hardware for wear and replace as necessary to maintain optimal braking performance. Use appropriate brake fluid and follow manufacturer torque specifications for all fittings.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The W37664 wheel cylinder undergoes rigorous quality control to ensure reliable operation in your Chevrolet I-Mark, Geo Spectrum, or Isuzu vehicle. Please refer to Dorman’s warranty policy for specific coverage details.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792537911477,"sku":"BKKX-W37664","price":23.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_W37664_Fro.jpg?v=1774997889","url":"https:\/\/www.partcatalog.com\/products\/dorman-w37664-drum-brake-wheel-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}