10-24
• VALVE STEM-TO-VALVE GUIDE CLEARANCE
• VALVE SEAT WIDTH
• VALVE INTALLATION HEIGHT
[1] VALVE SEAT
TOO LOW
[3] VALVE SEAT
TOO HIGH
[1]
INTALLATION HEIGHT
[2]
SEAT
WIDTH
STANDARD
SERVICE LIMIT
IN
0.030 – 0.055 mm
0.08 mm
(0.0012 – 0.0022 in)
(0.003 in)
EX
0.055 – 0.080 mm
0.11 mm
(0.0022 – 0.0031 in)
(0.004 in)
If the stem-to-guide clearance exceeds the service limit,
replace the valve and the valve guide as a set (P. 10-26).
Recondition the valve seat whenever replacing the valve guide
(P. 10-28).
NOTICE
STANDARD
SERVICE LIMIT
IN/EX
1.25 – 1.55 mm
2.0 mm
(0.049 – 0.061 in)
(0.08 in)
If the valve seat width is under the standard, or over the service
limit, or if the valve seat is too high/low, recondition the valve
seat (P. 10-28).
STANDARD
SERVICE LIMIT
IN/EX
44.0 – 44.6 mm
(1.73 – 1.76 in)
