{"product_id":"ict-billet-harmonic-balancer-crankshaft-pulley-bolt-for-gm-ls-lt-5-3l-6-2l-oem-spec-made-in-usa-single","title":"ICT Billet Harmonic Balancer Crankshaft Pulley Bolt for GM LS\/LT 5.3L–6.2L — OEM‑Spec, Made in USA (Single)","description":"\u003cp\u003e\u003cstrong\u003eICT Billet's 551218 harmonic balancer crankshaft pulley bolt is a factory-spec replacement bolt designed for GM Gen III–V small-block engines, ensuring correct clamping and service compliance.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen you remove and reinstall the harmonic balancer on GM's LS\/LT family, GM specifies replacing the balancer bolt each time — this ICT Billet part meets that requirement by offering a genuine OEM bolt made in the USA and sold individually. It fits a wide range of 5.3L, 6.0L and 6.2L engines across many LS-series castings (excluding LS7\/LS9 and LT4\/LT5), providing the correct thread, head size, and torque characteristics to secure the crank pulley reliably.\u003c\/p\u003e\n\n\u003ch3\u003eWhat vehicles and engines will this bolt fit?\u003c\/h3\u003e\n\u003cp\u003eThis bolt is compatible with most GM Gen 3, 4, and 5 V8 small-block engines, covering many LS and LT variants used in trucks, performance cars, and crate engines. Confirm fitment against your engine code or casting to avoid the excluded models.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with LS1, LS2, LS3, LS6, LQ4, LQ9, LM7, LM4, L33, LH6, L92, L76, LY2, LY5, LY6, LC9, LFA, LH8, LMG, and others.\u003c\/li\u003e\n  \u003cli\u003eFits common displacements: 5.3L, 6.0L, 6.2L where a balancer-bolt replacement is required.\u003c\/li\u003e\n  \u003cli\u003eNot suitable for LS7, LS9, LT4, or LT5 applications.\u003c\/li\u003e\n  \u003cli\u003eSold as a single replacement bolt — purchase quantity accordingly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy use this OEM-style bolt instead of reusing the original?\u003c\/h3\u003e\n\u003cp\u003eGM service guidelines require a new crank bolt when reinstalling the balancer because the bolt undergoes torque stretch and clamping load changes. Installing a new ICT Billet OEM-style bolt restores correct preload and reduces the chance of loosening or failure under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeets OEM specifications for strength and thread engagement.\u003c\/li\u003e\n  \u003cli\u003eRestores intended clamp force after disassembly and reinstallation.\u003c\/li\u003e\n  \u003cli\u003eReduces risk of balancer wobble or bolt loosening during operation.\u003c\/li\u003e\n  \u003cli\u003eManufactured in the USA for consistent quality and traceability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install this bolt to ensure proper torque and safety?\u003c\/h3\u003e\n\u003cp\u003eInstallation requires following GM torque specs and sequence to tighten the crank bolt correctly; using a calibrated torque wrench and, where specified, an angle gauge is essential. Tighten to the factory-specified torque and, if required, the published additional angle to achieve correct bolt stretch.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse the factory-recommended torque value and angle measurement if specified.\u003c\/li\u003e\n  \u003cli\u003eReplace any damaged washers or threads before install.\u003c\/li\u003e\n  \u003cli\u003eInspect crankshaft snout and balancer for damage or wear prior to reassembly.\u003c\/li\u003e\n  \u003cli\u003eAlways follow vehicle service manual procedures for safety.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes ICT Billet’s 551218 bolt a reliable purchase?\u003c\/h3\u003e\n\u003cp\u003eThis item is a genuine GM-spec bolt, manufactured in the United States and sold individually for accurate parts replacement. It’s produced to meet the mechanical properties and tolerances expected for high-load crankshaft fastening tasks in modern GM small-block engines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOEM-compliant design ensures proper fit and function.\u003c\/li\u003e\n  \u003cli\u003eMade in the USA for consistent materials and manufacturing control.\u003c\/li\u003e\n  \u003cli\u003eSold individually so you can replace exactly what's needed.\u003c\/li\u003e\n  \u003cli\u003eWorks across numerous LS and LT engine variants for broad applicability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This replacement bolt is intended for vehicle owners, mechanics, engine builders, and restorers working on GM Gen III–V small-block engines who want a compliant, high-quality OEM-style replacement after disassembling the harmonic balancer. If you’re servicing or rebuilding an LS\/LT engine (except the excluded models) and need to meet GM service requirements, this ICT Billet 551218 bolt is a straightforward, dependable option.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I reuse my old harmonic balancer bolt?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. GM service guidance requires replacing the balancer bolt after disassembly to ensure correct clamp and safety.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this bolt fit LS7 or LS9 engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This ICT Billet bolt fits most Gen 3–5 LS\/LT engines but excludes LS7, LS9, LT4, and LT5 models.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ICT Billet","offers":[{"title":"Default Title","offer_id":48084334215326,"sku":"B014AYX18Y","price":33.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ict-billet-front-view-bolt-551218.jpg?v=1785850429","url":"https:\/\/northtrailauto.ca\/products\/ict-billet-harmonic-balancer-crankshaft-pulley-bolt-for-gm-ls-lt-5-3l-6-2l-oem-spec-made-in-usa-single","provider":"North Trail Auto","version":"1.0","type":"link"}