{"product_id":"cloyes-9-5978-engine-timing-chain-tensioner","title":"Cloyes 9-5978 Engine Timing Chain Tensioner","description":"\u003ch2\u003eCloyes Timing Chain Tensioner 9-5978\u003c\/h2\u003e\u003cp\u003eThe Cloyes 9-5978 timing chain tensioner is built for engine timing service where consistent chain control matters. It is a spring-and-guide style tensioner with a metal housing, metal and nylon construction, and an included mounting bracket for a direct repair-focused replacement.\u003c\/p\u003e\u003cp\u003eCompatible With 2014-2021 Chevrolet Silverado 1500, 2018-2021 Chevrolet Express 2500, 2018-2021 Chevrolet Express 3500, 2014-2021 GMC Sierra 1500, 2018-2021 GMC Savana 2500, and 2018-2021 GMC Savana 3500. This part number, 9-5978, is also referenced as 95978 and 12686368 for the same application.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpring and guide tensioner design for timing chain control\u003c\/li\u003e\n\u003cli\u003eMetal housing with metal and nylon construction\u003c\/li\u003e\n\u003cli\u003eActivation pin style for service installation\u003c\/li\u003e\n\u003cli\u003eMounting bracket included\u003c\/li\u003e\n\u003cli\u003eShoe included for the tensioning surface\u003c\/li\u003e\n\u003cli\u003eTwo mounting holes with 0.386 in. diameter\u003c\/li\u003e\n\u003cli\u003eNon-adjustable design\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eCloyes timing systems have been a core focus since 1921, and the Timing Chain Tensioner line is built around maintaining proper chain tension during engine operation. This engine timing chain tensioner uses spring tension and a guide-style shoe to help keep the chain properly loaded, supporting stable valve timing in service applications. The white finish, metal housing, and nylon contact components reflect a practical OE-style service part construction. For timing system integrity, Cloyes recommends replacing the chain along with the tensioners, guides, and sprockets during service. The 9-5978 is a direct-fit timing chain tensioner for select Chevrolet and GMC trucks and vans, including Silverado 1500 and Sierra 1500 applications.\u003c\/p\u003e\u003ch2\u003eCommon Problems This Part Addresses\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eTiming chain slack that can affect engine timing stability\u003c\/li\u003e\n\u003cli\u003eNoise from a worn or weak chain tensioner\u003c\/li\u003e\n\u003cli\u003eUneven chain loading caused by a damaged guide surface\u003c\/li\u003e\n\u003cli\u003eTiming service repairs that require a replacement tensioner assembly\u003c\/li\u003e\n\u003cli\u003eWear-related issues in high-mileage Chevrolet Silverado 1500 and GMC Sierra 1500 engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eUse the activation pin during installation and verify the tensioner seats correctly against the chain guide. Inspect the timing chain, guides, and sprockets before reassembly, and replace worn components together to maintain timing system integrity. Confirm vehicle application by year, make, and model before installation on Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, and GMC Savana 3500 service vehicles.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eCloyes has supplied timing system components for over a century and backs its products with industry-leading technical support. The 9-5978 timing chain tensioner is engineered for professional engine service and supported by Cloyes brand expertise in timing components.\u003c\/p\u003e","brand":"Cloyes","offers":[{"title":"Default Title","offer_id":52484110680245,"sku":"BBKX-9-5978","price":28.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/CT_95978_Fro.jpg?v=1777982365","url":"https:\/\/www.partcatalog.com\/products\/cloyes-9-5978-engine-timing-chain-tensioner","provider":"PartCatalog","version":"1.0","type":"link"}