National 223800 Engine Camshaft Seal - Front

National 223800 Camshaft Seal Overview

National 223800 is an engine camshaft seal built for metric applications that require controlled oil sealing at the camshaft. It uses a polyacrylate sealing material and a clockwise-spiral lip design to help maintain a consistent seal at the shaft interface. This National camshaft seal is a direct-fit style oil seal for service work where accurate dimensions matter.

Key Features

• Part number: 223800
• Engine camshaft seal / oil seal for sealing system service
• Polyacrylate sealing material for oil resistance in engine applications
• Clockwise-spiral lip design for directional sealing performance
• Metric dimensions for precise housing and shaft fit
• Inside diameter: 1.496 in. / 38.000 mm
• Outside diameter: 1.980 in. / 50.280 mm
• Thickness / width: 0.413 in. / 10.500 mm
• Housing bore: 1.969 in. / 50.000 mm

Detailed Description

National 223800 is part of the 220000 series and is engineered as a metric oil seal for camshaft sealing applications. The seal’s polyacrylate material is selected for engine environments where oil exposure and heat resistance are important, while the clockwise-spiral lip design supports directional sealing at the shaft surface. With a 38.000 mm shaft size and 50.000 mm housing bore, this seal is specified for applications that require exact dimensional matching. National has supplied sealing solutions for more than 75 years, and this part reflects that focus on precision engine sealing. If you are servicing a Honda Civic, Toyota Camry, or similar engine platform that uses this size specification, National 223800 provides the dimensional accuracy needed for a proper repair.

Common Problems This Seal Helps Address

• Oil leakage at the camshaft seal area
• Oil seepage from a worn or hardened seal lip
• Contamination around the timing or front engine sealing area
• Loss of sealing performance from age, heat, or oil exposure
• Repeat leaks caused by incorrect seal dimensions

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal depth before installation. Inspect the camshaft surface for wear, scoring, or contamination, since surface damage can shorten seal life. Clean the bore and shaft thoroughly, and install the seal squarely to avoid lip distortion. Confirm the seal orientation matches the application and the clockwise-spiral lip design is positioned correctly for the engine’s rotation. For fitment-based searches, this part is commonly sought for Honda Civic and Toyota Camry camshaft seal replacement work, as well as other metric engine sealing applications that use the same dimensions. National 223800 should be matched to the exact OE-style size before assembly.

Quality Assurance

National is a long-established sealing brand with a history of supplying engine sealing components for automotive service. Part number 223800 is built to dimensional specifications that support accurate replacement in metric camshaft seal applications. This part cross-references Quality-Built 14701 for the same application.