Table of Contents
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Cylinder Head
Item
Head
Warpage
Height
Camshaft
End play
Camshaft-to-holder oil clearance
Total runout
Cam lobe height (K20Z2)
Cam lobe height (K20Z3)
Valve
Clearance (cold)
(K20Z2)
Clearance (cold)
(K20Z3)
Stem O.D.
Stem-to-guide clearance
Valve seat
Width
Stem installed height
Valve spring
Free length
Valve guide
I.D.
Installed height
Rocker arm
Arm-to-shaft clearance (K20Z2)
Arm-to-shaft clearance (K20Z3)
Measurement
No. 1 journal
No. 2, 3, 4, 5
journals
Intake (primary)
Intake
(secondary)
Exhaust
Intake (primary)
Intake (mid)
Intake
(secondary)
Exhaust
(primary)
Exhaust (mid)
Exhaust
(secondary)
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Qualification
Standard or New
―――
103.95 104.05 mm (4.093 4.096 in.)
−
−
0.05 0.20 mm (0.002 0.008 in.)
0.030 0.069 mm (0.001 0.003 in.)
−
0.060 0.099 mm (0.002 0.004 in.)
−
0.03 mm (0.001 in.) max.
34.263 mm (1.3489 in.)
29.638 mm (1.1668 in.)
34.092 mm (1.3422 in.)
32.791 mm (1.2910 in.)
35.534 mm (1.3990 in.)
32.678 mm (1.2865 in.)
32.772 mm (1.2902 in.)
34.768 mm (1.3688 in.)
32.661 mm (1.2859 in.)
0.21 0.25 mm (0.008 0.010 in.)
−
0.28 0.32 mm (0.011 0.013 in.)
−
−
0.21 0.25 mm (0.008 0.010 in.)
0.25 0.29 mm (0.010 0.011 in.)
−
5.475 5.485 mm (0.2156 0.2159 in.)
−
−
5.450 5.460 mm (0.2146 0.2150 in.)
0.030 0.055 mm (0.0012 0.0022 in.)
−
0.055 0.080 mm (0.0022 0.0031 in.)
−
−
1.25 1.55 mm (0.049 0.061 in.)
1.25 1.55 mm (0.049 0.061 in.)
−
44.0 44.5 mm (1.73 1.75 in.)
−
−
44.1 44.6 mm (1.74 1.76 in.)
NIPPON HATSUJO:
47.57 mm (1.8728 in.)
CHUO HATSUJO:
47.58 mm (1.8732 in.)
NIPPON HATSUJO:
49.64 mm (1.954 in.)
CHUO HATSUJO:
49.63 mm (1.954 in.)
−
5.515 5.530 mm (0.2171 0.2177 in.)
5.515 5.530 mm (0.2171 0.2177 in.)
−
15.2 16.2 mm (0.598 0.638 in.)
−
−
15.5 16.5 mm (0.610 0.650 in.)
0.025 0.052 mm (0.0010 0.0020 in.)
−
−
0.018 0.056 mm (0.0007 0.0022 in.)
0.025 0.052 mm (0.0010 0.0020 in.)
−
0.025 0.052 mm (0.0010 0.0020 in.)
−
Service Limit
0.05 mm (0.002 in.)
−
―――
−
0.4 mm (0.02 in.)
−
0.15 mm (0.006 in.)
−
0.15 mm (0.006 in.)
0.04 mm (0.002 in.)
―――
―――
―――
―――
―――
―――
―――
―――
―――
−
―――
−
―――
−
―――
−
―――
−
5.445 mm (0.214 in.)
−
5.420 mm (0.213 in.)
−
0.08 mm (0.003 in.)
−
0.11 mm (0.004 in.)
−
2.00 mm (0.079 in.)
−
2.00 mm (0.079 in.)
−
44.7 mm (1.76 in.)
−
44.8 mm (1.76 in.)
―――
―――
−
5.55 mm (0.219 in.)
−
5.55 mm (0.219 in.)
−
―――
−
―――
−
0.08 mm (0.003 in.)
−
0.08 mm (0.003 in.)
−
0.08 mm (0.003 in.)
−
0.08 mm (0.003 in.)
2-3
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