{"product_id":"mahle-50139-engine-piston-ring-set","title":"Mahle 50139 Engine Piston Ring Set","description":"\u003ch2\u003eEngine Piston Ring Set Overview\u003c\/h2\u003e\u003cp\u003eMAHLE piston ring set 50139 is a standard-size engine piston ring set built around a 4.000-inch bore diameter. It uses cast iron top and second rings with a stainless steel oil ring assembly for a balanced sealing package in compatible Ford, Mercury, Oldsmobile, Edsel, and Lincoln applications.\u003c\/p\u003e\u003cp\u003eMAHLE 50139 is engineered for buyers looking for a standard replacement piston ring set with OE-driven design priorities. The ring package focuses on reduced friction, controlled oil consumption, and service life, making it a practical choice for engine rebuild work.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStandard 4.000-inch bore diameter for matching engine rebuild specifications\u003c\/li\u003e\n\u003cli\u003eCast iron top ring and second ring for consistent sealing performance\u003c\/li\u003e\n\u003cli\u003eStainless steel oil ring assembly for corrosion-resistant oil control components\u003c\/li\u003e\n\u003cli\u003eNon-coated ring face design\u003c\/li\u003e\n\u003cli\u003eStandard oversize and standard grade construction\u003c\/li\u003e\n\u003cli\u003eMAHLE piston ring technology developed around OE requirements\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eMAHLE 50139 piston rings are designed for engine rebuilds that require a standard bore and a conventional ring package. The top ring and second ring are both cast iron, while the oil ring assembly uses stainless steel, with axial heights of 0.0781 in for the compression rings and 0.1875 in for the oil ring assembly. This configuration supports sealing, oil control, and stable operation in classic Ford and Mercury engine applications, along with selected Oldsmobile, Edsel, and Lincoln models. This part cross-references Hastings Piston Rings (e.g., 577, 650) for the same application.\u003c\/p\u003e\u003cp\u003eCompatible With Ford Country Sedan, Ford Country Squire, Ford Custom, Ford F-100, Ford F-250, Ford F-350, Ford Galaxie, Ford LTD, Ford P-350, Ford Ranch Wagon, Ford Ranchero, Ford Custom 500, Ford Fairlane, Ford Galaxie 500, Ford 300, Ford Custom 300, Ford Sunliner, Ford Thunderbird, Ford Victoria, Ford Club, Ford Skyliner, Ford Courier Sedan Delivery, Ford Del Rio Wagon, Mercury Colony Park, Mercury Commuter, Mercury Meteor, Mercury Monterey, Mercury Montclair, Mercury Turnpike Cruiser, Mercury Voyager, Oldsmobile Dynamic 88, Oldsmobile Fiesta, Oldsmobile Super 88, Oldsmobile 98, Oldsmobile 88, Oldsmobile Starfire, Edsel Corsair, Edsel Ranger, Edsel Villager, Lincoln Capri, Lincoln Mark II, and Lincoln Premier applications. MAHLE 50139 is a fitment-based engine piston ring set for rebuilders working on period-correct V8 applications.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestoring cylinder sealing in worn engines\u003c\/li\u003e\n\u003cli\u003eReducing oil consumption caused by ring wear\u003c\/li\u003e\n\u003cli\u003eAddressing compression loss during rebuilds\u003c\/li\u003e\n\u003cli\u003eReplacing worn piston rings during engine overhaul\u003c\/li\u003e\n\u003cli\u003eSupporting standard-bore rebuild specifications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify bore diameter before installation and confirm the engine is machined for a standard 4.000-inch ring set. Measure ring end gap, ring groove clearance, and cylinder finish during assembly to match rebuild specifications. Use the vehicle fitment list to confirm the correct Ford, Mercury, Oldsmobile, Edsel, or Lincoln application before ordering.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eMAHLE develops piston rings around OE requirements and focuses on friction reduction, oil control, and service life. Part number 50139 reflects that engineering approach for engine rebuild applications.\u003c\/p\u003e","brand":"Mahle","offers":[{"title":"Default Title","offer_id":53683238371509,"sku":"FLHQ-50139","price":77.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/VG_50139_Fro.jpg?v=1793776231","url":"https:\/\/www.partcatalog.com\/products\/mahle-50139-engine-piston-ring-set","provider":"PartCatalog","version":"1.0","type":"link"}