{"product_id":"cat-c15-cylinder-head-2239250","title":"CAT C15 Cylinder Head, 2239250 | 3406E \/ C15 Acert Universal, New","description":"\u003ch2\u003e\u003cstrong\u003eNEW CAT C15 \/ 3406E \/ C15 ACERT Universal Fully Loaded Cylinder Head — 2239250\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis is a \u003cstrong\u003ebrand new casting\u003c\/strong\u003e — not remanufactured, not a resurfaced core with new valves dropped in. Fully loaded and ready to install, and one universal casting covers your \u003cstrong\u003e3406E, C15, C15 ACERT, C16, and C18\u003c\/strong\u003e. Designed, cast, and assembled in the \u003cstrong\u003eUSA\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWhy C15 Heads Fail — and What We Changed\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe C15 and 3406E share a well-documented failure pattern: cracking between the valve seats, driven by heat cycling and coolant flow across the deck. It shows up as coolant loss with no external leak, white smoke on cold start, and temperatures that keep creeping no matter how many thermostats you throw at it. We went after the root cause in the casting itself:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e5% more nickel content\u003c\/strong\u003e — nickel is what gives cast iron its resistance to thermal fatigue. More nickel means a head that survives heat cycling instead of developing hairline cracks between the valves.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e30% larger coolant passages\u003c\/strong\u003e — more coolant flow across the exhaust valve bridge, the hottest region of the head and the place most C15 failures start. Lower peak metal temperature, longer head life.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eReinforced inner rib structure\u003c\/strong\u003e — added strength and rigidity under sustained heavy load.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eInconel exhaust valves (Stage 2)\u003c\/strong\u003e — withstand higher temperatures and pressures than standard valves.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eCorrosion-resistant materials\u003c\/strong\u003e — built to combat pitting, cracking, and wear.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003eFully loaded head: valves, springs, retainers, keepers, and seals installed\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eOEM-spec or better components, assembled with precision\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eCaterpillar \u003cstrong\u003e3406E, C15, C15 ACERT, C16, and C18\u003c\/strong\u003e — single and twin turbo applications, model years \u003cstrong\u003e1994–2011\u003c\/strong\u003e. Common engine serial number prefixes: \u003cstrong\u003e5EK, 6NZ, 1LW, 2WS, 6TS, MXS, BXS, NXS, SDP, MBN\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot sure which head you need?\u003c\/strong\u003e Send us your engine serial number before you order and we will confirm fitment.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eComplete the Job — What Every C15 Head Swap Needs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eEvery C15 head job needs a \u003ca href=\"\/products\/cat-c15-spacer-plate-6i4421\"\u003e\u003cstrong\u003espacer plate (6I4421 — standard to .004\\\" under)\u003c\/strong\u003e\u003c\/a\u003e and a \u003ca href=\"\/products\/cat-c15-head-bolt-kit-1241854\"\u003e\u003cstrong\u003enew head bolt kit (1241854 \/ 1241855)\u003c\/strong\u003e\u003c\/a\u003e — the bolts are torque-to-yield and single-use, and the spacer plate should be replaced with the head, not reused.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoing the head only?\u003c\/strong\u003e Add the \u003ca href=\"\/products\/331165-caterpillar-c15-3406e-head-gasket-kit-oem-2486740\"\u003e\u003cstrong\u003eC15 \/ 3406E Head Gasket Kit (2486740)\u003c\/strong\u003e\u003c\/a\u003e.\u003cbr\u003e\u003cstrong\u003eDoing a full in-frame overhaul?\u003c\/strong\u003e Skip the gasket kit — your overhaul kit already includes the upper gasket set. No reason to buy it twice.\u003c\/p\u003e\n\u003cp\u003eOr get everything in one box: the \u003ca href=\"\/products\/caterpillar-3406e-c15-c15-acert-cylinder-head-replacement-kit\"\u003e\u003cstrong\u003eC15 Cylinder Head Replacement Kit\u003c\/strong\u003e\u003c\/a\u003e bundles the head, bolt kit, and your choice of spacer plate.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eOEM Cross Reference Numbers\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e2239250 | 223-9250 | 20R2645 | 20R-2645 | 2237263 | 223-7263 | 20R2647 | 20R-2647 | 2430943 | 243-0943 | N223-9250EVS\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWarranty, Core \u0026amp; Shipping\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e1-year warranty\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eNo core charge\u003c\/strong\u003e — this is a new head, nothing to send back\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eShips from Houston, TX\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE: FIRE RING HEADS ARE MADE TO ORDER, ESTIMATED PREP TIME IS 1-3 DAYS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a new head or a remanufactured head?\u003c\/strong\u003e\u003cbr\u003eNew. A remanufactured head starts life as a used core that already failed once — the casting has been through hundreds of thousands of heat cycles before you install it. This one has not.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit both ACERT and non-ACERT engines?\u003c\/strong\u003e\u003cbr\u003eYes. This is a universal casting covering the 3406E, C15, C15 ACERT, and C16\/C18 applications, model years 1994–2011. Send us your engine serial number and we will confirm your specific arrangement before shipping.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes this different from an OEM head?\u003c\/strong\u003e\u003cbr\u003eTwo things, both in the casting: 5% more nickel for thermal fatigue resistance, and 30% larger coolant passages for better flow across the exhaust valve bridge — both aimed directly at the spot where C15 heads crack.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know if my C15 head is cracked?\u003c\/strong\u003e\u003cbr\u003eCoolant loss with no visible leak, white smoke on startup that clears as the engine warms, bubbles in the surge tank, and overheating a new thermostat does not fix. A pressure test confirms it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I get this head with fire rings?\u003c\/strong\u003e\u003cbr\u003eYes — fire ring heads are made to order with an estimated prep time of 1-3 days.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat else do I need for the job?\u003c\/strong\u003e\u003cbr\u003eA \u003ca href=\"\/products\/cat-c15-spacer-plate-6i4421\"\u003espacer plate\u003c\/a\u003e and a \u003ca href=\"\/products\/cat-c15-head-bolt-kit-1241854\"\u003enew head bolt kit\u003c\/a\u003e on every job — head bolts are single-use. Add the \u003ca href=\"\/products\/331165-caterpillar-c15-3406e-head-gasket-kit-oem-2486740\"\u003ehead gasket kit (2486740)\u003c\/a\u003e only if you are doing the head by itself; a full in-frame overhaul kit already includes the upper gasket set.\u003c\/p\u003e","brand":"TTM Diesel","offers":[{"title":"STAGE 1 (STANDARD)","offer_id":46711081238740,"sku":"2239250","price":3295.0,"currency_code":"USD","in_stock":true},{"title":"STAGE 2 PERFORMANCE (REINFORCED)","offer_id":46711081271508,"sku":"2239250-2\/EH","price":3495.0,"currency_code":"USD","in_stock":true},{"title":"STAGE 3 LOADED (INT \u0026 EXH INCONNEL VALVES)","offer_id":47259132264660,"sku":"2239250-3\/HH","price":3695.0,"currency_code":"USD","in_stock":true},{"title":"STAGE 4 (W\/FIRE RINGS)","offer_id":47259132297428,"sku":"2239250-FR","price":4195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0671\/9927\/1124\/products\/C15_1_600x_56316328-05c3-442e-8633-8160c89edebb.png?v=1699331877","url":"https:\/\/ttmdiesel.com\/products\/cat-c15-cylinder-head-2239250","provider":"TTM Diesel","version":"1.0","type":"link"}