FE350 ENGINE
Cylinder Head
2001 Pioneer 1200 Gasoline Vehicle Maintenance and Service Manual Page 13-17
13
NOTE: The valve seating surface angle is 30° (intake), 45° (exhaust) (Figure 13-29, Page 13-17).
2. If the valve head seating area is worn, replace the valve.
3. If the valve head seating area is eroded or nicked, it may be possible to repair the valve on a valve refac-
ing machine. Follow the refacing machine manufacturer’s instructions.
4. Inspect the stem for obvious wear, discoloration, and stem end damage.
5. If the stem is obviously worn or discolored, replace the valve.
Valve Head Thickness
1. Measure the thickness of the valve head, as shown (Figure 13-29, Page 13-17).
2. If the valve head thickness (A) (Figure 13-29, Page 13-17) is less than 0.024 inch (0.610 mm), replace
the valve.
Valve Stem Bend
1. Support the valve in V-blocks at each end of the stem (Figure 13-30, Page 13-18).
2. Position a dial gauge perpendicular to the stem.
3. Turn the valve and read the variation on the dial gauge.
4. If stem bend is greater than the service limit of 0.0012 inch (0.0305 mm), replace the valve.
Valve Stem Diameter
1. Using a micrometer, measure the diameter of the stem at several points along its length (Figure 13-31,
2. If the outside diameter is less than the service limit of 0.2728 inch (6.930 mm) intake, 0.2722 inch (6.915
mm) exhaust, replace the valve.
Figure 13-29 Valve Seating Surface Area
45
°
Exhaust
30
°
Intake
A
