{"product_id":"cat-c15-head-bolt-kit-1241854","title":"CAT C15 Head Bolt Kit, 1241854 \/ 1241855 | 3406E C16 C18, New","description":"\u003ch2\u003e\u003cstrong\u003eCAT C15 \/ 3406E Head Bolt Kit — 1241854 \/ 1241855, New\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eOne kit covers every year ever made — including the 2005 BXS engines.\u003c\/strong\u003e CAT kept the same head bolt spec across the 3406E, C15, and C15 ACERT with one exception: the 2005 model year \u003cstrong\u003eBXS\u003c\/strong\u003e engines used three different bolt types. Most kits on the market skip them. \u003cstrong\u003eOurs includes all three bolt types\u003c\/strong\u003e, which makes this kit truly universal: whatever year your engine is, this is the kit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRequired on every head job.\u003c\/strong\u003e CAT head bolts are torque-to-yield — they stretch permanently when torqued and are \u003cstrong\u003esingle-use by design\u003c\/strong\u003e. Reusing stretched bolts is the fastest way to lose clamping force and blow a brand-new head gasket. If the head is coming off, these go in the trash and new ones go on.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKit Includes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e(10)\u003c\/strong\u003e Long head bolts — OEM# \u003cstrong\u003e1241854\u003c\/strong\u003e (8.5\")\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e(16)\u003c\/strong\u003e Short head bolts — OEM# \u003cstrong\u003e1241855\u003c\/strong\u003e (7.6\")\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e(26)\u003c\/strong\u003e Hardened washers — OEM# \u003cstrong\u003e5H1504\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAll three 2005 BXS-spec bolt types included\u003c\/strong\u003e — full coverage for the one year CAT changed the spec\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003ePremium-grade materials, heat-treated for strength and durability\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003ePrecision-machined to OEM specifications\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eDesigned to maintain clamping force under high cylinder pressure\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eEvery year of Caterpillar \u003cstrong\u003e3406E, C15, and C15 ACERT\u003c\/strong\u003e ever made — including 2005 BXS — plus C16 and C18 applications using these bolt specs. Send us your engine serial number (ESN) if you want fitment confirmed.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003ePairs With\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eDoing the full job? You will also need:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003ca href=\"\/products\/cat-c15-cylinder-head-2239250\"\u003e\u003cstrong\u003eCAT C15 Cylinder Head, 2239250 (New, Universal)\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003ca href=\"\/products\/cat-c15-spacer-plate-6i4421\"\u003e\u003cstrong\u003eC15 \/ 3406E Spacer Plate (6I4421 — standard to .004\\\" under)\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\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 — for head-only jobs; in-frame overhaul kits already include it\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan I reuse my old head bolts?\u003c\/strong\u003e\u003cbr\u003eNo. These are torque-to-yield bolts — they stretch permanently the first time they are torqued. Reused bolts cannot hold spec clamping force, and the usual result is a blown head gasket within months.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my year — even a 2005 BXS?\u003c\/strong\u003e\u003cbr\u003eYes. CAT changed the head bolt spec for the 2005 model year BXS engines only, which used three different bolt types. This kit includes all three, so it covers every 3406E, C15, and C15 ACERT ever made — 2005 BXS included. Send us your ESN if you want it confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many bolts do I need for a C15 head?\u003c\/strong\u003e\u003cbr\u003eThis kit is the complete set for one head: 10 long, 16 short, plus 26 hardened washers.\u003c\/p\u003e","brand":"TTM Diesel","offers":[{"title":"Default Title","offer_id":44073746137300,"sku":"C15HBK","price":319.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0671\/9927\/1124\/products\/headboltkit_600x_62a80874-33fc-42ab-938c-90c20e4b9352.jpg?v=1699332609","url":"https:\/\/ttmdiesel.com\/products\/cat-c15-head-bolt-kit-1241854","provider":"TTM Diesel","version":"1.0","type":"link"}