{"product_id":"industrial-injection-premium-stock-plus-cylinder-head-12-valve-89-98-ram-5-9l-cummins","title":"Industrial Injection Premium Stock Plus Cylinder Head 12-Valve 89-98 Ram 5.9L Cummins","description":"\u003cp\u003ePlanning on rebuilding your 12-Valve Cummins and looking to boost power at the same time? Ensure your engine can withstand the extra stress that higher-performing injectors and fuel systems can impose with a cylinder head designed to handle it. Get an affordable and reliable upgraded head with Industrial Injection's Premium Stock Plus Cylinder Head.\u003c\/p\u003e\n\u003ch2\u003ePrecision Remanufacturing Process for Cylinder Heads\u003c\/h2\u003e\n\u003cp\u003eEvery \u003cstrong\u003eremanufactured cylinder head\u003c\/strong\u003e undergoes a detailed cleaning, inspection, and machining process to ensure it meets strict quality standards for \u003cstrong\u003ediesel engine performance, durability, and reliability\u003c\/strong\u003e. This comprehensive remanufacturing process helps restore the strength and efficiency expected from a \u003cstrong\u003eCummins diesel engine\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eThorough Cleaning \u0026amp; Inspection\u003c\/h2\u003e\n\u003cp\u003eEach cylinder head begins with a deep cleaning process to remove contaminants and prepare the casting for inspection and machining.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-pressure jet washing\u003c\/strong\u003e removes oil, grease, and debris\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlass bead blasting\u003c\/strong\u003e eliminates carbon buildup from the casting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnaflux inspection\u003c\/strong\u003e (for cast iron heads) detects hidden cracks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure testing\u003c\/strong\u003e verifies structural integrity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual inspection\u003c\/strong\u003e ensures the casting is free of defects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eValve guides and valve seats are removed as needed to prepare the cylinder head for machining or port work.\u003c\/p\u003e\n\u003ch2\u003eUpgraded Heat-Treated Valve Guides\u003c\/h2\u003e\n\u003cp\u003eNew \u003cstrong\u003ehigh-strength alloy valve guides\u003c\/strong\u003e are installed to improve durability and longevity in demanding diesel engine environments. These guides are \u003cstrong\u003eheat treated to Rockwell 22 “C” scale\u003c\/strong\u003e, delivering exceptional wear resistance that exceeds many factory materials, including bronze.\u003c\/p\u003e\n\u003cp\u003eEach valve guide also features a \u003cstrong\u003eprecision spiral groove\u003c\/strong\u003e designed to retain oil and improve valve stem lubrication during engine operation.\u003c\/p\u003e\n\u003ch2\u003ePrecision Diamond Honed Valve Guides\u003c\/h2\u003e\n\u003cp\u003eInstead of traditional reaming, the valve guides are \u003cstrong\u003eprecision honed using diamond abrasives\u003c\/strong\u003e. Diamond honing ensures consistent accuracy across every cylinder head.\u003c\/p\u003e\n\u003cp\u003eThis process provides:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExact valve guide sizing\u003c\/li\u003e\n\u003cli\u003eConsistent bore geometry\u003c\/li\u003e\n\u003cli\u003eSmooth internal surface finish\u003c\/li\u003e\n\u003cli\u003eImproved valve alignment and longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach guide is verified using a \u003cstrong\u003evalve guide bore gauge\u003c\/strong\u003e to ensure proper tolerances.\u003c\/p\u003e\n\u003ch2\u003eMulti-Angle Performance Valve Job\u003c\/h2\u003e\n\u003cp\u003eTo improve airflow and combustion efficiency, the cylinder head receives a \u003cstrong\u003eprecision multi-angle valve job\u003c\/strong\u003e using a \u003cstrong\u003eSerdi 100 guide and seat machine\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe Serdi system uses a \u003cstrong\u003esolid carbide straight shank pilot\u003c\/strong\u003e inserted into the valve guide to simulate the valve stem during machining. This process ensures perfect alignment between the \u003cstrong\u003evalve seat and valve face\u003c\/strong\u003e, creating an optimal seal and maximizing airflow in and out of the cylinder head.\u003c\/p\u003e\n\u003ch2\u003ePrecision Cylinder Head Surfacing\u003c\/h2\u003e\n\u003cp\u003eEach cylinder head is resurfaced using \u003cstrong\u003eCBN or diamond tooling\u003c\/strong\u003e on a \u003cstrong\u003eBerco milling machine\u003c\/strong\u003e. This machining process restores a perfectly flat sealing surface and allows technicians to control the finish based on the head gasket being used.\u003c\/p\u003e\n\u003cp\u003eFor example, \u003cstrong\u003eMLS (Multi-Layer Steel) head gaskets\u003c\/strong\u003e require an extremely smooth surface finish to ensure proper sealing in high-pressure diesel engines.\u003c\/p\u003e\n\u003ch2\u003eFinal Assembly\u003c\/h2\u003e\n\u003cp\u003eOnce all machining processes are complete, the cylinder head is:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJet washed again for final cleaning\u003c\/li\u003e\n\u003cli\u003eThoroughly dried\u003c\/li\u003e\n\u003cli\u003eAssembled with \u003cstrong\u003enew valve seals\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eEquipped with \u003cstrong\u003enew performance valve springs\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe result is a \u003cstrong\u003ehigh-quality remanufactured diesel cylinder head\u003c\/strong\u003e built for dependable performance in demanding \u003cstrong\u003eCummins engine applications\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Industrial Injection","offers":[{"title":"Default Title","offer_id":53084014248301,"sku":"IIS-PDM-12VSTKH","price":1423.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/2487\/2301\/files\/Industrial_injection_Premium_Stock_Plus_PDM-12VSTKH_2.webp?v=1772749230","url":"https:\/\/dieselpowerproducts.com\/products\/industrial-injection-premium-stock-plus-cylinder-head-12-valve-89-98-ram-5-9l-cummins","provider":"Diesel Power Products","version":"1.0","type":"link"}