{"product_id":"kawasaki-70z-ii-70z-iii-70z-iv-cylinder-head-daily-driver","title":"Kawasaki 70Z-II, 70Z-III \u0026 70Z-IV Cylinder Head Reman - Daily Driver (5.9L 12V)","description":"\u003cp\u003eGet your Kawasaki wheel loader back to work with an OEM-spec cylinder head engineered specifically for the rigorous demands of industrial operation. This Daily Driver tier cylinder head for the Cummins 5.9L 12-valve engine is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components to guarantee reliable operation, maximum uptime, and long-term durability on the job site.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003ePremium Component Breakdown\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eRemanufactured Casting:\u003c\/b\u003e Built from a high-quality OEM core casting that has passed rigorous magnetic testing and is machined to like-new industrial specifications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eNew Valves:\u003c\/b\u003e Equipped with new, high-quality intake and exhaust valves, meticulously inspected for proper seating and clearance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eNew Valve Springs and Retainers:\u003c\/b\u003e Utilizes brand-new valve springs matched to heavy equipment engine requirements, alongside durable retainers and locks for secure, continuous operation under heavy loads.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eNew Injector Cups:\u003c\/b\u003e Pre-installed new injector cups ensure proper fuel sealing and prevent coolant contamination.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features and Heavy-Duty Fixes\u003c\/h3\u003e\n\u003cp\u003eThis head features critical durability upgrades backed by an intense inspection protocol to guarantee every industrial specification is met.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003e40 PSI Pressure Testing:\u003c\/b\u003e After machining, every cylinder head is pressure-tested at 40 PSI to confirm zero leaks and ensure absolute casting integrity before it ever reaches your machine.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBlow-Proof Plugs:\u003c\/b\u003e Threaded, blow-proof plugs are installed in the top of the head for increased security, preventing the common leaks associated with pressed-in factory plugs under severe thermal stress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFinal Quality Control:\u003c\/b\u003e The head undergoes an extensive final cleaning and strict quality control inspection. A detailed sign-off sheet is generated, recording critical specifications using a profilometer, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e Valve Recessions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStem heights\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInstalled spring heights\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpring pressures\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eKeeper and lock positions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRoughness Average (RA) Finish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e\u003cem\u003eRecording this ensures you receive a cylinder head that is significantly improved over the original factory design and ready for years of demanding earthmoving operation.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003ePrecision Machining Process\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance has incorporated critical modifications to address common failure points of the factory 5.9L Cummins cylinder heads, drastically improving field reliability:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eOptimal Sealing Surface:\u003c\/b\u003e The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing head gasket sealing performance to withstand continuous thermal cycling.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eValve Train Geometry Alteration:\u003c\/b\u003e The head is custom blueprinted to alter valve height and valve recession, achieving maximum durability under continuous duty.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eLifter and Valve Train Longevity:\u003c\/b\u003e Valve stem heights are precisely altered to optimize valve train geometry. This crucial modification decreases wear and significantly extends the life of the lifters and camshaft.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eOptimized Flow and Sealing:\u003c\/b\u003e Valve seats are cut with a precise three-angle profile to optimize efficiency and ensure a perfect seal.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eValve Prep:\u003c\/b\u003e Valves are reground and margins are meticulously inspected to guarantee a flawless seal against the new seats.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eAll-New Wear Components:\u003c\/b\u003e New valve stem seals, valve seats, valve guides, and injector cups are installed across the board.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMeticulous Cleaning and Prep Process\u003c\/h3\u003e\n\u003cp\u003eQuality begins before machining with an intensive cleaning and stress-relieving process to ensure a flawless starting point:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eMagnetic Particle Inspection (MPI):\u003c\/b\u003e Each core is subjected to MPI testing to thoroughly check for any cracks or subsurface imperfections.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eThermal Stress Relieving:\u003c\/b\u003e The head undergoes a stress-relieving process in a specialized furnace to eliminate residual industrial oils and grease by baking them away.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eMaterial Relaxation:\u003c\/b\u003e The head is shot-blasted to remove rust and scaling, a crucial step that relaxes the cast iron before precision machining begins.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eThread Prep:\u003c\/b\u003e All broken bolts and studs are professionally removed, leaving all threads clean, chased, and ready for a seamless installation on your loader.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":67304084930864,"sku":"CEP59KA12VDHR","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/5.9Cummins12vCylinderHead_3ad86a5d-697c-4e4f-8105-ebefb801642b.png?v=1783557574","url":"https:\/\/choateperformance.com\/products\/kawasaki-70z-ii-70z-iii-70z-iv-cylinder-head-daily-driver","provider":"choateperformance","version":"1.0","type":"link"}