TM 5-3820-233-35/1
Table 1. Engine Repair and Replacement Standards --Continued
Manufacture's
Maximum
Desired
Dimensions and
Allowable
Clearance
Tolerances in Inches
Wear and
Components
Clearance
Min.
Max.
Min.
Max.
Crankshaft
____
____
3.500
____
3.499
Journal Diameter-Main Bearing
____
2.749
2.750
____
Journal Diameter-Connecting Rod
____
0.0010
____
____
0.00025
Journal Out-of-Round
____
____
0.0015
0.0005
____
Journal Taper
____
Runout on Journals
____
____
____
0.002
____
No. 2 and No. 4 Journals
____
____
____
0.004
____
No. 3 Journal
____
____
0.1205
0.1220
____
Thrust Washer, Tsickness
0.0180
0.0110
____
0.0040
____
End Thrust Clearance (End Play)
Main Bearings
____
____
3.5014
3.5034
____
Bearing Inside Diameter (Vertical Axis)
0.0014
0.0044
0.0060
____
------
Clearance-Bearing to Journal
0.1530
0.1553
____
____
0.1548
Bearing Thickness--90 From Parting Line
(min.)
Connecting Rod Bearings
____
2.7534
____
2.7514
____
Inside Diameter (Vertical Axis)
0.0060
____
____
0.0014
0.0044
Clearance-Bearing to Crankshaft Journal
0.1530
____
0.1548
0.1553
____
Bearing Thickness--90 from Parting Line
(min.)
Cylinder Block
Main Bearing Bore-Inside Diameter (Vertical Axis)
____
3.8130
____
____
3.812
Block Bore
Diameter
____
____
4.6275
____
4.6265
Out-of-Round
0.0030
____
____
0.0010
____
Taper
0.0020
0.0010
____
____
____
Cylinder Lincr Counterbore
Diameter
5.0460
5.0485
____
____
____
Depth
____
____
0.4785
0.4795
____
Cylinder Liners
Outside Diameter
____
4.6250
4.6260
____
____
Inside Diameter
____
____
4.2511
____
4.2495
____
Clearance-Liner to Block Bore
0.0005
0.0025
0.0030
____
Out-of-Round-Liner Inside Diameter
____
0.0020
____
0.0030
____
Taper-Liner Inside Diameter
____
0.0010
0.0020
____
____
Depth of Liner Flange BELOW High Block
____
0.0500
0.0465
____
0.0500
Height of Liner ABOVE Low Block
____
____
0.0060
0.0020
0.0060
____
Variation in Height Between Adjacent Liners
____
0.0020
____
0.0020
Pistons and Rings
Piston:
Height (Centerline of Bushing to Top of Piston)
____
3.5130
3.5180
____
____
Diameter:
At Top
____
4.2190
4.2220
____
____
At Skirt (Below Compression Ring Grooves
____
1.2433
4.2455
____
____
to Bottom)
Clearance--Piston Skirt to Line
0.0040
____
0.0078
0.0120
____
Out-of-Round
0.0005
____
____
____
____
Taper
____
0.0005
____
____
____
Compression Rings:
0.0180
0.0430
____
0.0600
____
Gap
Clearance-Ring to Groove:
Top Ring
0.0130
0.0095
____
____
0.0220
No. 2
0.0075
0.0110
____
____
0.0150
0.0055
No. 3 and 4
0.0090
____
____
0.0130
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