MAIN BEARINGS

TM 10-3930-644-14&P

F135

F163

Bearing Bore in Block, Diameter ............................................................................................................

2.5622-2.5615

Bearing Thickness ..................................................................................................................................

.0925-.0928

Wear Limits-Minimum Thickness............................................................................................................

.0920

Main Bearing Journal Diameter ..............................................................................................................

2.3752-2.3744

Wear Limits-Minimum Diameter .............................................................................................................

2.3734

Clearance Limits .....................................................................................................................................

0007-.0028

Desired Clearance..................................................................................................................................

.0015

Crankshaft End Play ...............................................................................................................................

002-.006

Center Flange Bearing

Thickness .......................................................................................................................................

.0926-.0929

Wear Limits-Minimum Thickness....................................................................................................

.0921

Clearance Limits .............................................................................................................................

.0005-.0026

Desired Clearance..........................................................................................................................

.0015

F. CAMSHAFT

Bearing Journal Diameter, Front ............................................................................................................

1.8725-1.8715

Center ..........................................................................................................

1.7465-1.7455

Rear .............................................................................................................

1.2475-1.2465

Wear Limits-Minimum Diameter (under minimum new shaft diameter)...................................................

.001

Bushing Inside Diameter, Front ..............................................................................................................

1.8755-1.8745

Center ..........................................................................................................

1.7502-1.7495

Rear .............................................................................................................

1.2505-1.2495

Bushing Clearance Limits ......................................................................................................................

.004-.002

End Play..................................................................................................................................................

.009-.005

Camshaft Bore in Cylinder Block - Finish Reamed Front ........................................................................

2.0000-1.9995

Center ....................................................................

1.8750-1.8740

Rear .......................................................................

1.3750-1.3745

G. INTAKE VALVES

Stem Diameter .......................................................................................................................................

3414-.3406

Wear Limits - Minimum Diameter ...........................................................................................................

.3386

Seat Angle ..............................................................................................................................................

Stem Clearance Limits ............................................................................................................................

.0026-.0008

Wear Limits-Maximum Clearance...........................................................................................................

.0046

Desired Stem Clearance ........................................................................................................................

.0015

H. EXHAUST VALVES

Stem Diameter .......................................................................................................................................

.3385-.3377

Wear Limits-Minimum Diameter .............................................................................................................

.3357

Seat Angle ..............................................................................................................................................

Stem Clearance Limits ............................................................................................................................

.0055-.0037

Wear Limits-Maximum Clearance ..........................................................................................................

0075

Desired Stem Clearance.........................................................................................................................

.0045

I. VALVE GUIDES

Outside Diameter ...................................................................................................................................

.6575-.6565

Stem Hole Diameter ...............................................................................................................................

.3432-.3422

Wear Limits - Maximum Diameter ..........................................................................................................

.3447

Contact Face to Guide ...........................................................................................................................

1.4688"

Length.....................................................................................................................................................

2.3125"

NOTE

Where no specification is listed for the F163 engine it is identical to the

specification for the F135 engine.

R-104-1

3-2