National 710850 Engine Crankshaft Seal - Front

National 710850 Front Engine Crankshaft Seal

National 710850 is a front engine crankshaft seal built for precise sealing performance in select Mini applications. It uses a PTFE sealing material and a clockwise-spiral lip design to help maintain a consistent seal at the crankshaft.

Compatible with 2007-2015 Mini Cooper, 2011-2016 Mini Cooper Countryman, and 2013-2016 Mini Cooper Paceman, this seal is sized for metric applications and matches the listed housing and shaft dimensions.

Key Features

• Part number: 710850
• Front engine crankshaft seal / oil seal
• PTFE sealing material
• Clockwise-spiral lip design
• Inside diameter: 2.402 in / 61.000 mm
• Outside diameter: 2.961 in / 75.200 mm
• Thickness: 0.315 in / 8.000 mm
• Housing bore: 2.953 in / 75.000 mm
• Metric unit of dimension

Detailed Description

National 710850 is an engine crankshaft seal designed for the front position and engineered around the listed metric dimensions for a proper housing and shaft match. The PTFE construction and spiral lip profile support controlled sealing at the crankshaft interface, while the 61 mm shaft size and 75 mm housing bore help confirm application fitment before installation. This part cross-references Bosch 67991 for the same application.

For buyers searching for a front crankshaft seal for Mini Cooper, Mini Cooper Countryman, or Mini Cooper Paceman, National 710850 provides a direct replacement option for the specified model years. The part number 710850 is also useful when verifying service records, catalog listings, or OE-style replacement references.

What It Helps Address

• Front crankshaft oil leakage
• Oil seepage at the engine seal area
• Seal wear from age and heat cycling
• Loss of sealing integrity at the crankshaft
• Service replacement for a worn front engine seal

Installation Notes and Tips

• Confirm the shaft diameter, housing bore, and seal width before installation.
• Inspect the crankshaft sealing surface for scoring or contamination.
• Clean the bore and surrounding area thoroughly before pressing the seal in place.
• Follow the vehicle service procedure for the correct front seal installation depth and orientation.
• Verify the application against the vehicle year, model, and front position listed for Mini Cooper, Mini Cooper Countryman, and Mini Cooper Paceman.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing products for modern vehicles. National 710850 reflects that sealing-focused engineering approach for front crankshaft service on the listed Mini applications.