Caterpillar C15 3406E Fire Ringed Cylinder Head | 2239250 | High Performance | New

New aftermarket Caterpillar cylinder head, OE reference 223-9250 (2239250), machined with a fire ring for a metal-to-metal combustion seal and fitted with Inconel valves. Built for high-cylinder-pressure applications on Caterpillar C15, C16, C18, and 3406E engines, it restores OEM sealing and compression with added sealing reliability under high-boost / high-horsepower conditions. Requires a matching fire-ring head gasket set.

Key Features:

• Machined fire ring — creates a metal-to-metal combustion seal for reliability under the high cylinder pressures of tuned, high-boost, and high-horsepower builds; helps prevent head gasket blowout
• Inconel valves for heat and corrosion resistance at exhaust-gas temperatures
• Supplied loaded — complete with valves and springs installed
• Valve guides, seats, and injector cups installed, and cam bearings installed; valve bridges included in the box (customer-installed)
• High-strength, alloyed cast-iron casting; OE reference 223-9250, a clean casting free of core sand
• Requires a matching fire-ring head gasket set — a standard head gasket will not seal a fire-ring head

Specifications:

• Base part number: 223-9250 (also searched 2239250)
• Component type: Cylinder head, complete (loaded), fire-ring machined
• Valve configuration: 24-valve (4 per cylinder); Inconel valves; valves and springs included
• Included components: valve guides, seats, injector cups, and cam bearings installed; valve bridges in-box
• Sealing: machined fire ring (requires matching fire-ring head gasket set)
• Condition: New (aftermarket)
• Material: high-strength, alloyed cast iron
• Engine: Caterpillar C15 / C16 / C18 / 3406E (inline-6, 15.2 L, SOHC, 24-valve)

Compatibility / Fitment:

• Caterpillar C15, C16, C18, and 3406E engines — the OE 223-9250 application range
• Primary applications: on-highway trucks; off-highway trucks (773GC); motor graders (24M); large excavators (365C, 374, 385C); wheel tractor-scrapers (621–657); track-type tractors (D8, D9); marine engines; and generator sets (SR4/SR4B, D450GC–D600GC)
• Required gasket: this fire-ring head must be installed with a matching fire-ring head gasket set — order it alongside the head (a standard gasket will not seal correctly)
• Fitment gate: verify your engine serial/arrangement against the 223-9250 casting before ordering — the C15 uses this casting on ACERT-family applications; earlier non-ACERT C15/C16 heads use a different casting
• Verify against the casting/part number on the head being replaced

Popular Cross-References / Interchanges:

• Caterpillar OE: 223-9250 (2239250)
• Caterpillar Reman: 20R-2647, 20R-2648
• More interchanges available in our Interchange Part Numbers tab

Conclusion:

The N223-9250FR is a new aftermarket Caterpillar fire-ring cylinder head with Inconel valves, supplied loaded and machined for a metal-to-metal combustion seal on C15, C16, C18, and 3406E engines. It restores factory sealing and compression with added durability under high cylinder pressures — install it with a matching fire-ring head gasket set for a proper seal.