They have a little snap ring to limit the depth inserted in into the head.
Overview
* 13212-H0112 GUIDE-VALVE INTAKE $8.08 * 13213-H0113 GUIDE-VALVE EXHAUST $8.25
Inspection
With the valve off the seat, move the valve side-to-side parallel with rocker arm.
The service specification (maximum allowed play) is:
- At the valve stem end, 7.9 thousands (0.0079 inch)
- At the valve head, 1.2 thousands (0.0012 inch)
Also see: Valve Spring Removal