SKF 31581 Engine Crankshaft Seal - Rear

Overview of the SKF Crankshaft Rear Seal - Rear 31581

The SKF Crankshaft Rear Seal - Rear 31581 is engineered to provide reliable sealing performance for select Nissan, Toyota, and Volvo vehicles. Designed with precision dimensions and a silicone sealing surface, this crankshaft rear seal helps maintain engine integrity by preventing oil leaks at the rear of the crankshaft.

• Width: 0.394 inches for optimal fit and sealing
• Outside Diameter: 3.944 inches ensuring proper housing compatibility
• Shaft Diameter: 3.150 inches matching specific crankshaft sizes
• Sealing Surface Type: Silicone for enhanced durability and resistance
• Compatible with Nissan 4Runner, 240SX, Altima; Toyota Pickup; Volvo 760 and 780 models

Detailed Product Description

This SKF crankshaft rear seal, part number 31581, is designed to fit the rear of the engine crankshaft, providing a critical barrier against oil leakage. The silicone sealing surface offers improved resistance to heat and wear compared to traditional materials, which helps extend the service life of the seal. With a width of 0.394 inches and an outside diameter of 3.944 inches, this seal fits precisely into the crankshaft housing, while the 3.150-inch shaft diameter ensures a tight seal around the crankshaft itself.

The Crankshaft Rear Seal - Rear product line from SKF focuses on delivering reliable sealing solutions specifically for the rear crankshaft area, where oil leaks can cause significant engine issues. This product line is engineered to meet OEM specifications for a range of vehicles, including Nissan, Toyota, and Volvo models, ensuring compatibility and performance.

Common Applications and Issues Addressed

• Prevents oil leaks at the rear crankshaft seal area
• Reduces risk of engine oil contamination and loss
• Helps maintain proper engine oil pressure
• Prevents dirt and debris ingress into the engine
• Addresses wear-related seal failures in Nissan 4Runner, Toyota Pickup, and Volvo 760 engines

Installation Notes and Tips

• Ensure the crankshaft and housing surfaces are clean and free of debris before installation
• Use appropriate tools to avoid damaging the silicone sealing surface during installation
• Verify the seal orientation matches OEM specifications for rear crankshaft seals
• Check shaft diameter and housing bore to confirm compatibility with part number 31581
• Apply a light coat of engine oil to the seal lip before installation to aid in proper seating

Quality Assurance and Warranty

SKF manufactures the Crankshaft Rear Seal - Rear 31581 to meet strict quality standards, ensuring durability and reliable performance in demanding engine environments. While specific warranty details are not provided, SKF products typically adhere to industry standards for material and workmanship quality, supporting long-term engine protection when installed correctly.