{"product_id":"elring-778-190-engine-coolant-pipe-seal","title":"Elring 778.190 Engine Coolant Pipe Seal","description":"\u003ch2\u003eEngine Coolant Pipe Seal for Thermostat Housing\u003c\/h2\u003e\u003cp\u003eElring 778.190 is an engine coolant pipe seal built as an O-ring for the thermostat area. With a 24.6 mm inner diameter and 2.4 mm thickness, it provides a precise sealing profile for upper thermostat coolant connections on select Chevrolet and GMC trucks and vans.\u003c\/p\u003e\u003cp\u003eUse this seal when servicing the thermostat housing or upper coolant pipe on applications such as Chevrolet Silverado 2500 HD, GMC Sierra 3500, and Chevrolet Express 3500. Elring 778.190 is made for direct-fit sealing performance where coolant leaks can affect engine temperature control.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrand: Elring\u003c\/li\u003e\n\u003cli\u003ePart number: 778.190\u003c\/li\u003e\n\u003cli\u003eEngine coolant pipe seal for thermostat applications\u003c\/li\u003e\n\u003cli\u003eO-ring shape for a secure sealing surface\u003c\/li\u003e\n\u003cli\u003eInner diameter: 24.6 mm\u003c\/li\u003e\n\u003cli\u003eThickness: 2.4 mm\u003c\/li\u003e\n\u003cli\u003eFitting position: Upper, Thermostat\u003c\/li\u003e\n\u003cli\u003eCross-reference: MAHLE B33276\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Elring coolant seal is specified for upper thermostat sealing points and is used in cooling system service where a worn or flattened O-ring can allow seepage at the pipe-to-housing interface. The part number 778.190 is listed for a wide range of Chevrolet Express 2500, Chevrolet Express 3500, Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Savana 2500, GMC Savana 3500, GMC Sierra 2500 HD, and GMC Sierra 3500 HD applications. It also covers 2007 Silverado and Sierra Classic variants, making it a practical replacement for thermostat-related coolant sealing service on GM heavy-duty platforms.\u003c\/p\u003e\u003cp\u003eThis part cross-references MAHLE B33276 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCoolant seepage at the thermostat housing or upper pipe connection\u003c\/li\u003e\n\u003cli\u003eLoss of seal integrity from heat cycling and age\u003c\/li\u003e\n\u003cli\u003eDrips or residue around the upper cooling system joint\u003c\/li\u003e\n\u003cli\u003eService issues during thermostat or coolant pipe replacement\u003c\/li\u003e\n\u003cli\u003ePressure loss at the sealing interface in the cooling system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInspect the sealing groove and mating surfaces before installation. Clean away old coolant residue, scale, and debris so the O-ring seats evenly. Verify the thermostat-side and upper-position application before assembly, and confirm the seal dimensions match the original part number 778.190 specification.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eElring is known for sealing-system components used in engine service, and this coolant pipe seal is built to support reliable fitment in thermostat applications. Confirm vehicle coverage against the listed fitment before ordering.\u003c\/p\u003e","brand":"Elring","offers":[{"title":"Default Title","offer_id":52744351940789,"sku":"DTWD-778.190","price":11.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/EL_778190_FRO.jpg?v=1782624635","url":"https:\/\/www.partcatalog.com\/products\/elring-778-190-engine-coolant-pipe-seal","provider":"PartCatalog","version":"1.0","type":"link"}