Part of Lesson Plan: **Remove and Replace a Valve (updated) by Steve Nagle

Activity Overview / Details

After removing the engine valve inspect it.

Look for obvious damage from burning.

Look for evidence of valve guide wear.

      - Buildup of carbon on intake valves indicates oil getting past the guide and seal.

      - Grooves at the top of the valve stem indicate a loose valve guide.  Dragging your thumb nail across the valve surface helps to find wear that cannot be readily seen.

      - Spin the valve in an electric drill.  If the valve wobbles it is bent.