ENGINE BLOCK AND CYLINDER HEAD TABLE OF SPECIFICATIONS, NEW CLEARANCES AND WEAR LIMITS

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TM-55-1905-220-14-4 Landing Craft Unit LCU 1671-1679 (1905-01-009-1056) Manual

ENGINE PARTS

TM 55-1905-220-14-4

ENGINE BLOCK AND CYLINDER HEAD

TABLE OF SPECIFICATIONS, NEW CLEARANCES AND WEAR LIMITS

These limits also apply to oversize and undersize parts.

ENGINE PARTS

MINIMUM

MAXIMUM

LIMITS

(Standard Size, New)

(inches)

(cm)

(inches)

(cm)

(inches)

(cm)

Cylinder Block

Block bore:

Diameter ......................................

4.6260

11.7500

4.6270

11.7526

Out-of-round.................................

0010

.0025

.0020

.0051

Taper ...........................................

.0010

.0025

.0020

.0051

Cylinder line counterbore:

Diameter ......................................

5.0460

12.8168

5.0510

12.8295

Depth. ..........................................

4770

1.2116

.4795

1.2179

Main bearing bore:

Inside diameter

(vertical axis)................................

4.8120

12.2225

4.8130

12.2250

Top surface of block:

Centerline of main bearing

bore to top of block.......................

6.1840

41.1074

16.1890

41.1201

16.176

41.0870

.....................................................

min.

Flatness-transverse

(all)...............................................

.0030

.0076

Flatness-longitudinal

(all)...............................................

.0050

.0127

Depth of counterbores

(top surface):

Cylinder head seal

strip groove ..................................

.0970

.2464

.1070

.2718

Water holes

(between cylinders) ......................

.1140

.2896

.1200

.3048

Combination water

and oil holes .................................

.0920

.2337

.0980

.2489

Cylinder Liner

Outside diameter ................................

4.6250

11.7475

4.6260

11.7500

Inside diameter ...................................

4.2495

10.7937

4.2511

10.7978

Clearance-liner-to-block......................

.0000

.0020

.0051

.0025

.0064

Out-of-round-inside

diameter .......................................

.0020

.0051

.0025

.0064

Taper-inside diameter .........................

.0010

.0025

.0020

.0051

Depth of flange BELOW block ............

.0450

.1143

.0500

.1270

.0500

.1270

Variation in depth between

adjacent liners ..............................

.0020

.0051

.0020

.0051

Flange thickness.................................

.2500

.6350

.2520

.6401

Insert thickness...................................

.1795

.4559

.1800

.4572

3-255