VALVE STEM SEAL ASSEMBLY WITH VALVE GUIDE RETAINER

摘要

A valve stem seal assembly (10) for an internal combustion engine includes an elastomer seal body (14) and a metal retainer (36) adapted to secure the seal body in place over a valve guide (12). The cylindrical seal body (14) has an aperture with at least one radially inwardly directed sealing lip (16) adapted to engage a reciprocally movable valve stem to minimize escape of oil lubricant from the engine along a path between the valve guide and stem. The retainer (36), formed of a spring metal cylindrical body adapted to frictionally retain the seal body (14) at its upper end, contains first and second sets (42, 44) of axially depending resilient fingers at its lower end. The first set (42) of fingers mechanically engages and supports a unique valve guide member (12) within a valve guide aperture (48) of a cylinder head deck (46), while the second set of fingers supports the seal assembly directly against the head deck under a valve spring.