Valve Spring Inspection; Valve Seat Inspection; Valve Guide Inspection - Mitsubishi 4G9 User Manual

11A-9-10
Out of square
Valve
guide
E
E
Mitsubishi Motors Corporation
Mitsubishi Motors Corporation
4G9 ENGINE (E–W) –
VALVE SPRING
(1) Measure the valve spring's free height. If the measurement
Free height
(2) Measure the squareness of the spring. If the measurement
VALVE SEAT
Valve stem end
(1) Assemble the valve, then measure the valve stem
Valve stem
projection
Spring seating
surface
VALVE GUIDE
(1) Measure the clearnace between the valve guide and valve
Nov. 1995
Jun. 2002
Cylinder Head and Valves
is less than specified, replace the spring.
SOHC (with adjusting screw)
SOHC (with lash adjuster)
DOHC
DOHC–MIVEC
DOHC–GDI
exceeds the specified limit, replace the spring.
Standard value: 2_ or less
Limit: 4_
projection between the end of the valve stem and the
spring seating surface. If the measurement exceeds the
specified limit, replace the valve seat.
Intake SOHC
DOHC
DOHC–MIVEC
DOHC–GDI
Exhaust SOHC
DOHC
DOHC–MIVEC
DOHC–GDI
stem. If the limit is exceeded, replace the valve guide
or valve, or both.
Standard value:
Intake: 0.02 – 0.05 mm
Exhaust: 0.05 – 0.09 mm
<SOHC, DOHC, DOHC–MIVEC, DOHC–GDI for
CARISMA, SPACE STAR, SPACE RUNNER,
GALANT>
0.04 – 0.06 mm <DOHC–GDI for PAJERO io>
Limit:
Intake: 0.10 mm
Exhaust: 0.15 mm
PWEE9502-A
PWEE9502-K
Standard value Limit mm
mm
50.9 49.9
49.5 48.5
45.0 44.0
51.5 50.5
44.8 43.8
Standard value Limit mm
mm
49.30 49.80
46.70 47.20
57.85 58.35
46.65 47.15
49.35 49.85
46.65 47.15
58.13 58.63
46.70 47.20
Revised Revised