Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 1393

11B-44
Contact
(Must be at
centre of face)
Total valve length
Squareness
Valve
guide
Stem outer
Guide inner
diameter
diameter
ENGINE OVERHAUL -
2. VALVE
Margin
3. VALVE SPRING
Free height
4. VALVE GUIDE
Cylinder Head and Valve
(1) If there is a faulty contact, one - sided contact or
improper seating with the valve seat, correct the valve
seat.
(2) Replace the valve if the margin exceeds the limit
value.
Standard value:
Intake 1.0 mm
Exhaust 1.5 mm
Limit value:
Intake 0.5 mm
Exhaust 1.0 mm
(3) Measure the total length of the valve, and replace
the valve if the length exceeds the limit value.
Standard value:
Intake 109.50 mm
Exhaust 109.70 mm
Limit value:
Intake 109.00 mm
Exhaust 109.20 mm
(1) Measure the free height of the spring, and replace
the valve spring if the height exceeds the limit value.
Standard value: 48.3 mm
Limit value: 47.3 mm
(2) Measure the spring squareness, and replace the valve
spring if the inclination exceeds the limit value.
Standard value: 1.5_ or less
Limit value: 4_
Measure the clearance between the valve guide and valve
stem. If the clearance exceeds the limit value, replace
the valve guide, valve or both parts.
Standard value:
Intake 0.02 - 0.05 mm
Exhaust 0.05 - 0.09 mm
Limit value:
Intake 0.10 mm
Exhaust 0.15 mm