{"product_id":"motorad-251-185-engine-coolant-thermostat","title":"Motorad 251-185 Engine Coolant Thermostat","description":"\u003ch2\u003eReliable Engine Coolant Thermostat for Mercedes-Benz Models\u003c\/h2\u003e\u003cp\u003eThe Motorad Standard 251-185 engine coolant thermostat is designed to maintain optimal engine temperature for select Mercedes-Benz vehicles. Engineered to open at 185 degrees Fahrenheit, this thermostat ensures efficient coolant flow and engine performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSealing flange outside diameter: 2.64 inches\u003c\/li\u003e\n\u003cli\u003eHeight between flanges: 1.44 inches\u003c\/li\u003e\n\u003cli\u003eStandard type thermostat with jiggle pin weep hole\u003c\/li\u003e\n\u003cli\u003eBypass diameter: 1.64 inches; bypass length: 0.97 inches\u003c\/li\u003e\n\u003cli\u003eFlange thickness: 0.06 inches\u003c\/li\u003e\n\u003cli\u003eStart to open temperature: 185°F\u003c\/li\u003e\n\u003cli\u003eCompatible with Mercedes-Benz 300D, 300SD, 300SDL, 300TD, 350SD, 350SDL, E300, and S350\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Motorad Standard 251-185 thermostat is a precision-engineered component designed to regulate coolant flow in Mercedes-Benz engines. Its 185-degree Fahrenheit opening temperature helps maintain the engine within the ideal operating range, preventing overheating and promoting fuel efficiency. The thermostat features a jiggle pin weep hole to allow air to escape from the cooling system, reducing the risk of air pockets that can cause temperature fluctuations. With a sealing flange outside diameter of 2.64 inches and a flange thickness of 0.06 inches, this thermostat fits securely within the cooling housing. The bypass diameter of 1.64 inches and length of 0.97 inches facilitate proper coolant circulation during engine warm-up.\u003c\/p\u003e\u003ch2\u003eAbout the Motorad Standard Product Line\u003c\/h2\u003e\u003cp\u003eThe Standard line from Motorad offers dependable, OEM-quality replacement parts designed to meet original equipment specifications. This line focuses on delivering consistent performance and fitment for a range of vehicles, including Mercedes-Benz models. The 251-185 thermostat exemplifies the Standard line’s commitment to precision and reliability without additional accessories such as gaskets or installation tools, allowing for straightforward integration into existing cooling systems.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMaintains proper engine temperature for Mercedes-Benz 300D, 300SD, 300SDL, 300TD, 350SD, 350SDL, E300, and S350 models\u003c\/li\u003e\n\u003cli\u003ePrevents engine overheating by opening coolant flow at 185°F\u003c\/li\u003e\n\u003cli\u003eReduces risk of coolant bypass issues with precise bypass diameter and length\u003c\/li\u003e\n\u003cli\u003eEliminates air pockets in the cooling system via jiggle pin weep hole\u003c\/li\u003e\n\u003cli\u003eReplaces faulty or stuck thermostats causing poor engine performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eThis thermostat does not include a gasket or installation tool, so ensure the existing gasket is inspected and replaced if necessary. Proper sealing flange alignment is critical to prevent coolant leaks. The jiggle pin should be positioned at the highest point to allow air to escape during installation. Verify compatibility with your specific Mercedes-Benz model before installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eMotorad Standard thermostats are manufactured to meet strict quality standards for durability and performance. While no specific warranty information is provided, Motorad products typically adhere to industry norms for replacement parts. Always consult product documentation or supplier details for warranty coverage.\u003c\/p\u003e","brand":"Motorad","offers":[{"title":"Default Title","offer_id":45162970382517,"sku":"BFNG-251-185","price":23.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/TZ_251185_Fro.jpg?v=1775103739","url":"https:\/\/www.partcatalog.com\/products\/motorad-251-185-engine-coolant-thermostat","provider":"PartCatalog","version":"1.0","type":"link"}