{"product_id":"fel-pro-crankshaft-seal-kit-for-jeep-wrangler-1987-1999-front-rear-oe-grade-oil-leak-repair","title":"Fel-Pro Crankshaft Seal Kit for Jeep Wrangler 1987–1999 — Front \u0026 Rear OE-grade Oil Leak Repair","description":"\u003cp\u003e\u003cstrong\u003eFel‑Pro BS 40612 is a complete crankshaft seal kit engineered to restore proper front and rear crank sealing on 1987–1999 Jeep Wrangler engines.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis kit includes vehicle‑specific seals and components built to Fel‑Pro's OE-grade standards, designed to replace worn crank seals and stop oil leaks at the crankshaft interfaces. The parts are manufactured to the correct dimensions and materials for long service life and to match the original fit, form, and function expected by professional installers and do‑it‑yourself mechanics alike. Before ordering, confirm your Wrangler’s year, engine and crankshaft configuration to ensure compatibility.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this crankshaft seal kit address oil leaks on my Wrangler?\u003c\/h3\u003e\n\u003cp\u003eThe BS 40612 set replaces deteriorated front and rear crank seals that commonly cause oil seepage or visible drips. New seals reestablish the tight contact between the crankshaft and engine housings so oil remains routed through galleys and sumps rather than escaping at the seal faces.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes front and rear crankshaft seals sized for 1987–1999 Wrangler applications.\u003c\/li\u003e\n  \u003cli\u003ePrecision molded sealing lips ensure consistent contact and minimal leakage.\u003c\/li\u003e\n  \u003cli\u003eMaterials resist heat and oil degradation for extended service life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes Fel‑Pro seals different from generic replacements?\u003c\/h3\u003e\n\u003cp\u003eFel‑Pro designs seals and gaskets specifically for repair applications, using application‑matched materials and tooling to meet or exceed original equipment specifications. That means improved reliability, better fitment during installation, and predictable performance under typical engine temperatures and oil exposure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApplication‑specific design reduces trimming or modification during install.\u003c\/li\u003e\n  \u003cli\u003eValidated for fit, form, and function against factory requirements.\u003c\/li\u003e\n  \u003cli\u003eManufactured to quality standards trusted by repair shops and enthusiasts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this kit fit my Jeep Wrangler and how do I confirm fit?\u003c\/h3\u003e\n\u003cp\u003eThe BS 40612 is listed for 1987–1999 Jeep Wrangler models, but engine variants and aftermarket changes can affect compatibility. Always verify fit by checking your vehicle details (year, engine displacement, and crankshaft layout) against the seller’s fitment notes or application chart before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm year and engine type to match part specifications.\u003c\/li\u003e\n  \u003cli\u003eReview any seller‑provided fitment notes or vehicle qualifiers.\u003c\/li\u003e\n  \u003cli\u003eContact parts support if your Wrangler has non‑stock engine components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I approach installation and what tools are helpful?\u003c\/h3\u003e\n\u003cp\u003eProper installation requires removing ancillary components to access the crankshaft seal bores and often reusing OEM procedures for seal seating and torque values. A seal driver or appropriately sized socket, clean mating surfaces, and correct lubricants will help ensure the seal seats evenly without damage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse a seal installer or flat driver to press seals squarely into bores.\u003c\/li\u003e\n  \u003cli\u003eClean sealing surfaces and remove old gasket material before fitting.\u003c\/li\u003e\n  \u003cli\u003eLightly coat seal lips with engine oil to prevent dry starts and premature wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Fel‑Pro BS 40612 crankshaft seal kit is aimed at Jeep Wrangler owners, home mechanics and professional technicians restoring older Wranglers (1987–1999) who need a direct, vehicle‑specific replacement to stop oil leaks and return the engine to reliable operation. It's a practical choice when the crank seals are the source of oil loss or during engine service where seals are removed or disturbed.\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: Does the BS 40612 kit include both front and rear crank seals?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The Fel‑Pro BS 40612 kit supplies the necessary front and rear crankshaft seals for the listed 1987–1999 Wrangler applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install these seals myself?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A competent DIYer can install them with basic tools and a seal driver; follow clean mating surfaces, correct lubrication, and torque specs for best results.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Fel-Pro","offers":[{"title":"Default Title","offer_id":48086101000350,"sku":"B000C2E7YQ","price":41.88,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/fel-pro-bs40612-front-seal-kit-packaging_jpg.jpg?v=1785884677","url":"https:\/\/northtrailauto.ca\/products\/fel-pro-crankshaft-seal-kit-for-jeep-wrangler-1987-1999-front-rear-oe-grade-oil-leak-repair","provider":"North Trail Auto","version":"1.0","type":"link"}