{"product_id":"dj-rock-pr638-engine-piston-ring-set","title":"DJ Rock PR638 Engine Piston Ring Set","description":"\u003ch2\u003eEngine piston ring set for Nissan and Suzuki\u003c\/h2\u003e\u003cp\u003eDJ Rock PR638 is a premium engine piston ring set built to restore the seal between the piston and cylinder wall. It is specified for complete-engine service applications and is listed for Nissan Frontier, Nissan Altima, Nissan Sentra, and Suzuki Equator fitments.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrecision-engineered ring set for compression sealing, oil control, and heat transfer.\u003c\/li\u003e\n\u003cli\u003ePremium-grade construction with cast iron or steel alloy materials.\u003c\/li\u003e\n\u003cli\u003eSurface treatments such as chrome plating, molybdenum coating, or nitriding help reduce friction and wear.\u003c\/li\u003e\n\u003cli\u003e88.9 mm bore diameter with 1.2 mm top compression, 1.2 mm second compression, and 2.5 mm oil ring thickness.\u003c\/li\u003e\n\u003cli\u003eBuilt to meet or exceed OEM quality standards.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed description\u003c\/h2\u003e\u003cp\u003eThe DJ Rock PR638 piston ring set is designed for internal combustion engine rebuild and repair work where consistent cylinder sealing is required. By combining top compression rings, second rings, and oil control rings, this set supports compression retention, oil regulation, and thermal stability across the engine. It is a fitment-based solution for 2002-2006 Nissan Altima, 2002-2006 Nissan Sentra, 2005-2015 Nissan Frontier, 2016-2019 Nissan Frontier, and 2009-2012 Suzuki Equator applications. The PR638 part number is also cross-referenced to Hastings Piston Rings 2C5099 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat it is used for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestoring cylinder compression after ring wear.\u003c\/li\u003e\n\u003cli\u003eReducing oil consumption caused by worn oil control rings.\u003c\/li\u003e\n\u003cli\u003eImproving sealing in engines with blow-by concerns.\u003c\/li\u003e\n\u003cli\u003eSupporting rebuilds where ring thickness and bore size must match the engine specification.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation notes and tips\u003c\/h2\u003e\u003cp\u003eVerify bore diameter, ring thickness, and engine application before installation. Clean the piston ring grooves thoroughly and inspect the cylinder walls for wear or scoring before assembly. Follow the engine builder’s ring gap and break-in procedures for the specific application.\u003c\/p\u003e\u003ch2\u003eQuality assurance\u003c\/h2\u003e\u003cp\u003eDNJ Engine Piston Ring Sets are manufactured to meet or exceed OEM quality standards and use materials selected for wear resistance and thermal stability.\u003c\/p\u003e","brand":"DJ Rock","offers":[{"title":"Default Title","offer_id":53260837748917,"sku":"FLPN-PR638","price":73.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DJ_PR638_Generic.jpg?v=1789276191","url":"https:\/\/www.partcatalog.com\/products\/dj-rock-pr638-engine-piston-ring-set","provider":"PartCatalog","version":"1.0","type":"link"}