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Items
D28 series
Remarks
Head diameter
50.9 ~ 51.1
“H” thickness of valve head
1.9 ~ 2.3
Valve seat part diameter of head
53.00 ~ 53.03
Outside diameter of valve seat
53.10 ~ 53.11
Cylinder
Intake valve
head
Stem diameter
11.969 ~ 11.980
& valve
Radius direction clearance
0.020 ~ 0.049
Seat angle
30
˚
Head diameter
57.85 ~ 58.15
“H” thickness of valve head
2.6 ~ 3.0
Valve seat part diameter of head
61.00 ~ 61.03
61 H7
Outside dia. of valve seat
61.10 ~ 61.11
Depth of head’s valve seat assembly part
12.5 ~ 12.6
Valve guide inside diameter
12.000 ~ 12.018
12 H7
Valve guide’s inside diameter of head
18.000 ~ 18.018
18 H7
Valve guide’s outside diameter
18.028 ~ 18.046
18.25 S7
Valve guide assembly locking piece
0.010 ~ 0.046
Valve seat’s shaking
0.04
reference to
valve guide
Valve Valve
lift
14.1
spring
Projecting amount of valve guide
17.1 ~ 17.5
Above valve spring
Free length of inside spring
72.43
Spring load of inside spring
15 ~ 17kg
at 46.3mm
Spring load of inside spring
27 ~ 32kg
at 32.3mm
Free length of outside spring
68.17
Spring load of outside spring
37 ~ 41kg
at 46.3mm
Spring load of outside spring
66.5 ~ 76.5kg
at32.8mm
Timing
Rocker arm bush’s inside diameter
25.005 ~ 25.035 when assembled
Rocker arm bearing journal’s diameter
24.967 ~ 24.990
Bearing’s clearance
0.015 ~ 0.068
Push rod’s shaking
0.3
Valve tappet ass’y part’s inside dia. of block
20.000 ~ 20.021
20 H7
Push rod’s outside diameter
19.944 ~ 19.965
Tappet clearance
0.035 ~ 0.077
