SECTION 10 -- ENGINE -- CHAPTER 1
7
CRANKCASE/CYLINDER BLOCK DATA
mm (in)
Crankcase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
cast--iron monobloc with cylinder liners,
crankshaft, camshaft and tappets
Cylinder bore diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
104.000 to 104.024
(4.09944 to 4.0954)
Oversized cylinder bore diameter . . . . . . . . . . . . . . . . . . . . . . . . . . .
104.500 to 104.524 (4.1141 to 4.1151)
Main journal half bearing seat diameter
external no. 1--5
87.982 to 88.008 (3.4638 to 3.4648)
internalno. 2--3--4
87.977 to 88.013 (3.4636 to 3.4650)
Camshaft bushing seat diameter:
-- front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
59.222 to 59.248 (2.3315 to 2.3325)
-- intermediate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
59.222 to 59.248 (2.3315 to 2.3325)
-- rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
59.222 to 59.248 (2.3315 to 2.3325)
Diameter of standard tappet bores in crankcase . . . . . . . . . . . . . .
16.000 to 16.030 (0.6299 to 0.6311)
CRANKSHAFT AND BEARINGS DATA
mm (in)
Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
balanced with integral counterweights
Standard journal diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
82.987 to 83.013 (3.2671 to 3.2682)
Journal undersizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.250 to 0.500 (0.0098 to 0.0196)
Main journal half bearing thickness . . . . . . . . . . . . . . . . . . . . . . . . . .
2.456 to 2.464 (0.0966 to 0.0970)
Main half bearing undersizes (internal diameter) . . . . . . . . . . . . . .
0.250 to 0.500 (0.0098 to 0.0196)
Clearance between bearings and main journal
no. 1--5
0.041 to 0.119 (0.0016 to 0.0046)
n. 2--3--4
0.041 to 0.103 (0.0016 to 0.0040)
Standard crankpin diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
68.987 to 69.013 (2.7160 to 2.7170)
Crankpin undersizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.250 to 0.500 (0.0098 to 0.0196)
Standard connecting rod half bearing thickness . . . . . . . . . . . . . . .
1.955 to 1.968 (0.0769 to 0.0774)
Connecting rod half bearing undersizes (internal diameter) . . . . .
0.250 to 0.500 (0.0098 to 0.0196)
Bearing to crankpin clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.033 to 0.041 (0.0012 to 0.0016)
Standard crankshaft thrust washer width . . . . . . . . . . . . . . . . . . . . .
37.280 to 37.380 (1.4677 to 1.4716)
Width of main bearing for thrust . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25.980 to 26.480 (1.0228 to 1.0425)
Width of corresponding crankshaft journal . . . . . . . . . . . . . . . . . . . .
37.475 to 37.550 (1.4753 to 1.4783)
Crankshaft assembly endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.172 to 0.240 (0.0067 to 0.0094)
Summary of Contents for 90
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