No. Name Dimension and tolerance Fit clearance
Diameter of cylinder head third bearing hole
021.0
0
724
+
Hφ
+0.074
Diameter of camshaft fourth journal
040.0
053.0
624
−
−
eφ
18
Diameter of cylinder head fourth bearing hole
021.0
0
724
+
Hφ
+0.040～
+0.074
Diameter of camshaft fifth journal
040.0
053.0
624
−
−
eφ
19
Diameter of cylinder head fifth bearing hole
021.0
0
724
+
Hφ
+0.040～
+0.074
20 Camshaft thrust groove width
025.0
0
765.30
+
H
+0.15～+0.20
Outside diameter of camshaft oil seal
4.0
2.0
50
+
+
φ
21
Diameter of cylinder head oil seal hole
025.0
0
750
+
Hφ
-0.005～
-0.40
Diameter of cylinder head jib hole
024.0
006.0
712
+
+
Gφ
22
Outside diameter of hydraulic jib φ12-0.011
+0.006～
Diameter of crankshaft timing gear segment Φ28f7
23
Bore diameter of crankshaft timing gear φ28＋0.030
Key groove dimension of crankshaft timing gear 5
＋
0.030
Key groove width of crankshaft gear 5
＋
0.030
24
Semicircular key width 5
0
-0.030
0~0.06
25 Bore diameter of crankshaft pulley φ74
+0.046
26 Outside diameter of timing gear φ74
-0.05
-0.08
0.096~0.126
III. Primary Fit Clearance
Name Fit Clearance
Axial clearance of crankshaft 0.07～0.265mm
Axial Clearance of Camshaft 0.15～0.20mm
Axial clearance of connecting rod 0.15～0.4mm
Fit clearance of connecting rod bearing 0.023～0.058mm
Fit clearance of main bearing 0.035～0.075mm
Fit clearance between intake valve stem and valve 0.012～0.043mm
