S-62
V3307-DI-T-E2B, WSM
ENGINE
Correcting Valve and Valve Seat
NOTE
Q
• Before correcting the valve and seat, check the valve stem
and the I.D. of valve guide section, and repair them if
necessary.
• After correcting the valve seat, be sure to check the valve
recessing.
1) Correcting Valve
1. Correct the valve with a valve refacer.
2) Correcting Valve Seat
1. Slightly correct the seat surface with a 0.79 rad (45 °) valve seat
cutter.
2. Resurface the seat surface with a 0.26 rad (15 °) valve seat cutter
so that the width is close to specified valve seat width.
3. After resurfacing the seat, inspect for even valve seating, apply a
thin film of compound between the valve face and valve seat, and
fit them with valve lapping tool.
4. Check the valve seating with prussian blue. The valve seating
surface should show good contact all the way around.
W10283500
Free Length and Tilt of Valve Spring
1. Measure the free length
(B)
with vernier calipers. If the
measurement is less than the allowable limit, replace it.
2. Put the spring on a surface plate, place a square on the side of
the spring, and check to see if the entire side is contact with the
square. Rotate the spring and measure the maximum tilt
(A)
. If
the measurement exceeds the allowable limit, replace.
3. Check the entire surface of the spring for scratches. Replace it,
if any.
W1063303
Valve face angle
(Intake and exhaust)
Factory spec.
0.79 rad
45 °
Valve seat width
(Intake and exhaust)
Factory spec.
3.3 to 3.6 mm
0.13 to 0.14 in.
Valve seat angle
(Intake and exhaust)
Factory spec.
0.79 rad
45 °
(1) Valve Seat Width
(2) Identical Dimensions
(A) Check Contact
(B) Correct Seat Width
(C) Check Contact
(a) 0.26 rad (15 °)
(b) 0.79 rad (45 °)
(c) 0.52 rad (30 °)
Tilt
(A)
Allowable limit
1.0 mm
0.039 in.
Free length
(B)
Factory spec.
35.1 to 35.6 mm
1.39 to 1.40 in.
Allowable limit
34.6 mm
1.36 in.
(A) Tilt
(B) Free length
KiSC issued 01, 2009 A