FAG SS3878 Engine Crankshaft Seal - Rear

Overview of FAG Engine Crankshaft Seal SS3878

The FAG SS3878 engine crankshaft seal is designed for reliable sealing performance in various GM vehicles. Engineered with Viton sealing material and a rubber spring auxiliary lip, this seal ensures effective protection against oil leaks in Buick, Chevrolet, Oldsmobile, and Pontiac models.

• Seal Type: Rubber with spring and auxiliary lip for enhanced sealing
• Sealing Material: Durable Viton for high resistance to heat and chemicals
• Bore Diameter: 3.92 inches (99.568 mm)
• Seal Outside Diameter: Approximately 3.93 inches (99.771 mm)
• Seal Width: 12.7 mm (0.5 inches)
• Compatible with multiple GM makes and models including Camaro, Impala, Bonneville, and more

Technical Details and Specifications

The FAG SS3878 crankshaft seal features a robust design with a rubber body supported by a spring and an auxiliary lip to maintain consistent sealing pressure. The use of Viton as the sealing material provides excellent resistance to engine oils, high temperatures, and aging, which is critical for maintaining engine integrity. The precise bore diameter of 3.92 inches and outside diameter near 3.93 inches ensure a secure fit within the crankshaft housing. With a seal width of 12.7 mm, this component balances durability and compactness for optimal engine performance.

Compatible Vehicles and Applications

This crankshaft seal is compatible with a range of Buick, Chevrolet, Oldsmobile, and Pontiac vehicles. Specific models include the Chevrolet Camaro, Impala, Lumina, and Monte Carlo; Buick LeSabre, LaCrosse, and Park Avenue; Oldsmobile Achieva and Cutlass Ciera; Pontiac Firebird, Grand Prix, and Grand Am among others. The part number SS3878 is designed to meet the sealing requirements of these vehicles’ engine crankshafts, helping maintain oil containment and engine efficiency.

• Prevents oil leaks from the crankshaft area
• Reduces contamination of engine oil by external debris
• Maintains engine oil pressure and lubrication
• Protects engine components from premature wear
• Helps avoid costly engine repairs related to seal failure

Installation Notes and Tips

When installing the FAG SS3878 crankshaft seal, ensure the crankshaft surface is clean and free of debris or old sealant. Use appropriate tools to press the seal evenly into place without damaging the sealing lip. Verify the correct orientation of the auxiliary lip and spring to maintain proper sealing function. It is recommended to inspect the crankshaft and surrounding components for wear or damage before installation to ensure optimal performance.

Quality Assurance and Warranty

FAG manufactures the SS3878 crankshaft seal to meet stringent quality standards, using high-grade Viton material and precision engineering. This part is designed for durability and consistent performance under typical engine operating conditions. While specific warranty details may vary, FAG products generally come with manufacturer-backed quality assurance to support reliability in automotive applications.