Tech Tip – Burned Engine Valves
You’ve likely heard the term “burned valve” or the car needs a “valve job” at one time or another. While this was a common problem in days gone by, these types of major engine malfunctions are pretty rare now with the superior engineering and materials in newer cars. However, we did just finish up an exhaust valve replacement on a vehicle, and I thought it might make an interesting object lesson to show what a burned valve looks like.
Most valve failures, at least the “burned” type, are on the exhaust valve side of the engine, for it deals with the hot exhaust gases. You can see here how those gases have actually cut into the face of the valve, creating a small channel which allows leakage, and prevents the car from developing proper compression. So here for historical purposes is a “burned valve”.