Since the least common result of valve failure is the valve itself, it is always necessary to determine the cause of failure prior to replacement of the damaged valves (Figure 1).
The illustration in Figure 2 shows the characteristic appearance of an impact failure.
NOTE: Breakage by impact is a sudden failure. Example: piston to valve collision.
The illustration in Figure 3 shows the characteristic appearance of a fatigue failure.
NOTE: Breakage by material fatigue happens after thousands of cycles, starting in a small defect and advancing until breakage occurs.
Source: Supertech Performance
Engine Builder Staff
Latest posts by Engine Builder Staff (see all)
- PERA Webinar with Ron Sledge of King Engine Bearings - Apr 17, 2015
- How to Port and Polish High Performance V8 Heads - Apr 17, 2015
- Taking the Mystery Out of Labor Inventory - Apr 17, 2015