Engine Valve Seat and Insert Wear
892146
09/01/1989
- Event
- Content
- In this investigation, worn valve seats and inserts have been examined to obtain a fundamental understanding of the primary wear mechanisms. Seats and inserts from a wide variety of engines were studied using optical and electron microscopy. The recessed region on seats and inserts displayed a common feature which can be described as a series of ridges and valleys formed circumferentially around the seat axis. These ridges and valleys were found to be due to either a relatively severe gouging process or to a milder deformation and wearing process. These processes were related to assembly and product geometry factors which caused misalignment between the seats and inserts.
- Pages
- 12
- Citation
- van Diesel, R., Barber, G., Larson, J., and Narasimhan, S., "Engine Valve Seat and Insert Wear," SAE Technical Paper 892146, 1989, https://doi.org/10.4271/892146.