Title: Install valve train components.
Course: Small Engine Technology II (20110-II) > Section: Diagnosing and Troubleshooting Small-Engine Equipment

Installation should follow manufacturers specifications and instructor’s guidelines and include

- inspecting and testing valve springs for squareness, pressure, and free height comparison and replacing as needed
- inspecting valve spring retainers, locks, and valve grooves
- replacing valve stem seals
- inspecting valve guides for wear, checking valve guide height and stem-to-guide clearance, and reconditioning or replacing as needed
- inspecting valves and resurfacing or replacing
- inspecting valve seats and resurfacing or replacing
- checking valve face-to-seat contact and valve seat concentricity (runout), checking lapping seat-to-face, and servicing seats and valves as needed
- checking valve spring assembled height and valve stem height and servicing valve and spring assemblies as needed
- inspecting and measuring camshaft bearings for wear, damage, out-of-round, and alignment, and determining needed repairs.

Process/Skill Questions:

- What measuring tools are required in the installation of the valve train?
- When should valve seats/faces need reworking?
- How are overhead valve systems different from L-head valve systems?