FAG SS3888 Engine Crankshaft Seal - Rear

Engine Seal for Rear Applications

FAG SS3888 is a rear engine seal built for vehicles that need dependable sealing at the crankshaft area. It uses Viton sealing material with a rubber body, spring, and auxiliary lip to help maintain a tight seal and protect critical components from contamination.

Key Features

• Viton sealing material for durability in demanding engine environments
• Rubber, spring, and auxiliary lip seal design
• Bore diameter: 102.997 mm / 4.055 in
• Seal outside diameter: 103.226 mm / 4.064 in
• Seal width: 84.988 mm / 3.346 in
• Direct replacement reference for FAG SS3888
• Cross-references National 710767 for the same application

Detailed Description

FAG SS3888 is engineered as an engine crankshaft seal for rear-position applications across a wide range of import vehicles, including Hyundai Sonata, Kia Optima, Jeep Cherokee, Subaru Outback, and Mitsubishi Lancer. The seal is designed with a Viton sealing element and a spring-loaded profile to help maintain contact pressure and control oil sealing at the crankshaft interface. Its dimensions and sealing profile are important for proper fitment, especially in applications where the rear seal must handle heat, contamination, and long-term engine movement.

This part number, SS3888, is listed across many rear-fit applications from 1990 through 2019, including Hyundai Santa Fe, Dodge Journey, Jeep Compass, and Subaru Forester. For buyers searching by vehicle, this is a rear crankshaft seal for Hyundai Sonata rear, Kia Sorento rear, and Subaru Legacy rear applications where the listed OE-style dimensions match the original seal specification.

What It Helps Address

• Engine oil leakage at the rear crankshaft seal area
• Contamination entering the seal interface from dirt, dust, or moisture
• Loss of grease or lubricant retention at the bearing/seal boundary
• Wear-related sealing issues caused by age, heat, and mileage
• Replacement needs during rear main seal service on listed vehicles

Installation Notes and Tips

Verify bore diameter, outside diameter, and seal width before installation. Clean the sealing surface thoroughly and inspect the crankshaft journal for wear, scoring, or corrosion. Proper alignment during installation is important to avoid damaging the sealing lip or spring. Confirm rear-position fitment against the vehicle listing before ordering, especially on Hyundai, Kia, Jeep, Subaru, and Mitsubishi applications.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain FAG quality standards. The SS3888 is built for demanding sealing requirements and is specified for a broad range of rear engine applications.