Table 1-1. Repair and Replacement Standards

TM 10-3930-634-34

(b) Standard bolt and nut torque specifications.

Torque

Size nut

Torque

Size nut

(lb-ft)

or bolt

(lb-ft)

1/2-13

410-420

718-9

7-9

71-75

1/4-20

7/8-14

475-485

1/2-20

8-10

83-93

1/4-28

1-8

580-590

90-100

13-17

9/16-12

5/16-18

685-695

1-14

15-19

9/16-18

107-117

5/16-24

705-735

1-1/8-12

137-147

5/8-11

3/8-16

30-35

790-840

1-1/4-12

168-178

35-39

5/8-18

3/8-24

1-1/2-12

900-1000

3/4-10

240-250

7/16-14

46-50

3/4-16

290-300

7/16-20

57-61

(c) Standard pipe plug torque specifications.

cessible on the outside of a finished engine.

Torque (lb-ft)

Pipe plug size

However, they do not apply to plugs installed

10-12

1/8"

below the surface of the part of which they

14-16

1/4"

18-22

3/8 "

are a component. Headless plugs to be flush

23-27

1/2"

to 1/16, inch below the surface of cylinder head.

33-37

3/4"

Apply sealing compound to plugs used with-

75-85

out gaskets or teflon tape.

95-105

I-1/4"

(9) E n g i n e , r e p a i r a n d r e p l a c e m e n t s t a n d a r d s .

110-130

1-1/2"

Table 1-1 lists the manufacturer's sizes, tolerances,

NOTE

c l e a r a n c e s , and maximum allowable wear and clear-

These specifications apply only to plugs ac-

ances.

Table 1-1. Repair and Replacement Standards

New Parts

Wear

limits

Minimum

Maximum

Engine parts (standard size)

CYLINDER BLOCK'

Block Bores:

4.5235"

4.5195"

4.5215"

Diameter (Top)-

4,4900"

4.4865"

4.4880 "

Diameter (Center)

4.3595"

4.3565"

4.3575"

Diameter (Bottom)

0.0015"

Out-of-Round

0,0015"

Taper

Top Surface

0.0030"

Flatness-Transverse (All)

0.0070 "

Flatness-Longitudinal

Depth of Counterbores (Top Surface}

0.0970"

0.1070"

Cylinder Head Seal Strip Grove

0.0980"

0.0920 "

Oil Holes

0.1150"

0.1090"

Water Holes

Main Bearing Bore:

3.2520"

3.2510"

Inside Diameter (Vertical Axis) In-Line Engine

Cylinder Liner Counterbore:

4.8350"

4.8200 "

Diameter

0.3020"

0.3000"

Depth

CYLINDER LINERS'

4.4860"

4.4850"

Outside Diameter (Upper Seal: Ring Surface)

4.3560"

4.3550"

Outside Diameter (Lower Seal Ring Surface)

3.8767 "

3.8752"

Inside Diameter

0.003 "

0,0020"

Out-of-Round

0,002 "

0.0010"

Taper-Liner

0.050"

0.0465 "

0.0500"

Depth of Liner Flange Below Block

PISTON'

3.8715"

3.8693"

Diameter (At Skirt)

0.0074"

0.0037 "

Clearance-Piston-to-Liner

0.0005 "

Out-of-Round

0.0005 "

Taper

1.3780"

1.3775"

Piston Pin Bushing-Inside Diameter

PISTON PINS'

1,3750"

1.3746"

Diameter

0.010"

0.0025"

0.0034 "

Clearance-Pin-to-Piston Bushing

1-3