Fel-Pro Crankshaft Seal Kit for Jeep Wrangler 1987–1999 — Front & Rear OE-grade Oil Leak Repair

Fel‑Pro BS 40612 is a complete crankshaft seal kit engineered to restore proper front and rear crank sealing on 1987–1999 Jeep Wrangler engines.

This 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.

How does this crankshaft seal kit address oil leaks on my Wrangler?

The 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.

• Includes front and rear crankshaft seals sized for 1987–1999 Wrangler applications.
• Precision molded sealing lips ensure consistent contact and minimal leakage.
• Materials resist heat and oil degradation for extended service life.

What makes Fel‑Pro seals different from generic replacements?

Fel‑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.

• Application‑specific design reduces trimming or modification during install.
• Validated for fit, form, and function against factory requirements.
• Manufactured to quality standards trusted by repair shops and enthusiasts.

Will this kit fit my Jeep Wrangler and how do I confirm fit?

The 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.

• Confirm year and engine type to match part specifications.
• Review any seller‑provided fitment notes or vehicle qualifiers.
• Contact parts support if your Wrangler has non‑stock engine components.

How should I approach installation and what tools are helpful?

Proper 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.

• Use a seal installer or flat driver to press seals squarely into bores.
• Clean sealing surfaces and remove old gasket material before fitting.
• Lightly coat seal lips with engine oil to prevent dry starts and premature wear.

Who 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.