O-Ring – Head Orfice – 9.5 × 1.9 mm

This O-ring is a small but essential sealing component used in Honda engine assemblies, commonly found sealing interfaces such as oil passages, dowel bores, or precision-fit mating surfaces where a compact oil-resistant seal is required. Its precise size and resilient material help maintain fluid sealing under heat, pressure, and vibration.

Over time, exposure to heat cycles and engine oil can cause O-rings to harden or lose elasticity. Replacing this seal during engine service, rebuilds, or component removal helps ensure consistent sealing performance and decreases the risk of leaks.

Manufactured to factory specifications for size and durability in high-temperature environments, this O-ring is suitable for proper maintenance and restoration work.

Details

• Engine oil sealing O-ring

• Inner diameter: 9.5 mm

• Cross-section: 1.9 mm

• Designed for oil-exposed engine environments

Factory Part Number: 91306-PJ4-000