National 710363 Engine Crankshaft Seal - Rear

National 710363 Rear Crankshaft Seal

National 710363 is a rear engine crankshaft seal built for Nissan and INFINITI applications that require a metric oil seal with precise housing and shaft dimensions. It uses a fluoro-elastomer sealing material and a counter-clockwise spiral lip design to support consistent sealing at the rear of the crankshaft.

Compatible With rear seal applications on the Nissan 350Z, Altima, Maxima, Murano, Quest, and Pathfinder, as well as INFINITI FX35, G35, M35, I35, QX4, and I30 models. This part number, 710363, is also referenced in OE-style replacement searches for the same application.

Key Features

• Part type: engine crankshaft seal / oil seal
• Position: rear
• Material: fluoro-elastomer for sealing performance in engine environments
• Counter-clockwise spiral lip design
• Metric dimensions for accurate housing and shaft fit
• National series: 710300
• Cross-reference: SKF 30350A

Detailed Description

National 710363 is an oil seal designed for the rear crankshaft location where stable sealing around the shaft is critical. The seal measures 84.000 mm inside diameter, 118.100 mm outside diameter, and 7.000 mm width, with a housing bore of 118.000 mm. Its fluoro-elastomer construction is selected for engine sealing service, while the counter-clockwise spiral lip design supports the sealing interface used in these Nissan and INFINITI rear crankshaft applications. Search terms such as rear crankshaft seal for Nissan Maxima, rear engine oil seal for INFINITI G35, and National 710363 crankshaft seal all point to this exact part.

Vehicle coverage includes 1995-2006 Nissan Maxima, 2001-2004 Nissan Pathfinder, 2002-2006 Nissan Altima, 2003-2006 Nissan 350Z, 2003-2006 Nissan Murano, 2004-2006 Nissan Quest, 1996-2001 INFINITI I30, 2002-2004 INFINITI I35, 2001-2003 INFINITI QX4, 2003-2006 INFINITI FX35, 2003-2006 INFINITI G35, and 2006 INFINITI M35, all in the rear position.

What It Helps Address

• Rear crankshaft oil leakage
• Oil seepage at the engine rear main seal area
• Contamination from a worn or hardened seal lip
• Loss of sealing performance from age, heat, and engine oil exposure
• Fitment issues when replacing an OE-style rear oil seal on listed Nissan and INFINITI models

Installation Notes and Tips

Confirm the shaft diameter, housing bore, and seal orientation before installation. The listed dimensions are 84.000 mm shaft size, 118.000 mm housing bore, and 7.000 mm width, so the seal should be matched carefully to the engine case and crankshaft surface. Inspect the crankshaft sealing surface for wear, scoring, or contamination before installing the new seal. Clean the housing thoroughly and seat the seal evenly to avoid distortion.

Quality Assurance

National has supplied sealing products for more than 75 years and continues to develop sealing solutions for modern vehicles. Part number 710363 is built as a precision engine oil seal for the specified rear crankshaft applications.