The 25102 oil seal is an OEM Continental elastomer sealing component used in aircraft piston engines to contain engine oil at rotating shaft interfaces, most commonly at the crankshaft (front or rear depending on engine configuration). It maintains a tight seal against the rotating shaft while allowing smooth rotation, preventing oil leakage from the crankcase.

The seal typically includes a flexible sealing lip and may incorporate a garter spring (depending on variant) to maintain constant radial pressure against the shaft surface.

Key features include:

OEM Continental crankshaft oil seal
Oil-resistant elastomer sealing material
Maintains sealing contact on rotating crankshaft surface
Prevents engine oil leakage under pressure and rotation
Designed for high-temperature and high-RPM aviation environments
May include internal tension spring for constant lip pressure
Compatible with Continental piston engine crankcase assemblies (IPC-dependent use)
Resistant to oil, heat, and continuous vibration
Replaceable component used during engine overhaul or major service
Used in certified aircraft piston engine maintenance and rebuild procedure