Hyundai HDF 50-7S, Service Manual

Page: 343 / 518

SERVICE DATA
2-3
1.2 Basic engine
Table 2-2 Maintenance service data table - Basic engine (1 / 4) Unit: mm [in.]
Inspection point Nominal Standard Limit Remark
Rocker
Rocker bushing inside diameter
ø 19
[0.75]
19.010 to 19.030
[0.7484 to 0.7492]
Rocker shaft outside diameter
ø 19
[0.75]
18.980 to 19.000
[0.7472 to 0.7480]
Clearance between rocker bushing and
shaft 0.010 to 0.050
[0.0004 to 0.0020]
0.070
[0.0028]
Valve and
valve guide
Valve stem
outside diameter
Inlet
ø 8
[0.31]
7.940 to 7.955
[0.3126 to 0.3132]
7.900
[0.3110]
Exhaust
ø 8
[0.31]
7.920 to 7.940
[0.3118 to 0.3126]
7.850
[0.3091]
Clearance between
valve stem and
guide
Inlet
0.065 to 0.095
[0.0026 to 0.0037]
0.150
[0.0059]
Exhaust
0.080 to 0.115
[0.0031 to 0.0045]
0.200
[0.0079]
Valve guide mounting dimension
14
[0.55]
13.9 to 14.1
[0.547 to 0.555]
Valve seat
Valve seat angle 30°
Valve sinkage
Inlet
0.4
[0.016]
0.3 to 0.5
[0.012 to 0.020]
1.0
[0.039]
Exhaust
0.5
[0.020]
0.4 to 0.6
[0.016 to 0.024]
1.0
[0.039]
Seat width
1.4
[0.055]
1.26 to 1.54
[0.0496 to 0.0606]
1.8
[0.071]
Valve margin
2.13
[0.0839]
Refacing
permissible up to
1.83 [0.0720]
Valve
spring
Free length
48.85
[1.9232]
47.60
[1.8740]
Perpendicularity
A = 1.5°or less
B = 1.3 [0.051]
or less
Lf = 48.85 [1.9232]
B = 1.5 [0.059]
at the end
Set length/set load
43 mm [1.69 in.]/
176 to 196 N
{18 to 20 kgf}
[39 to 44 lbf]
43 mm [1.69 in.]/
147 N
{15 kgf}
[33 lbf]
Pushrod Runout
0.6
[0.024] or less
0.6
[0.024]
Runout (dial gaule reading)
when push rod is supported
along center line of spheri-
cal surface at either end.
Cylinder head
Distortion of bottom face
0.05
[0.0020] or less
0.20
[0.0079]
Reface minimum thickness.
Compressed thickness of gasket
1.2
[0.047]
1.20 ± 0.05
[0.0472 ± 0.0020]
Cylinder
Inside diameter
ø 94
[3.70]
94.000 to 94.035
[3.7008 to 3.7022]
Repair limit:
94.200 [3.7087]
Replace limit:
94.700 [3.7283]
Refinish cylinder to 0.25
[0.0098] or 0.50 [0.0197]
oversize of nominal valve
by honing.
Use oversize piston and pis-
ton ring.
Circularity
0.01
[0.0004] or less
Cylindricality
0.015
[0.0006] or less
Valve
margin
Valve
sinkage
Valve
seat angle
Seat width
A
B
Lf
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