ARMY TM 9-6115-464-34
AIR FORCE TO 35C2-3-445-2
NAVY NAVFAC P-8-624-34
Table 1-1. FITS AND TOLERANCES (CONTINUED)
Mfg’s. Tolerances
Desired Clearance
Maximum
Maximum
Component
Allowable
Allowable
Minimum
Maximum
Minimum
Maximum
Wear
Clearance
PISTON RING:
Clearance in groove – top
Keystone
Taper
Clearance in groove – 2nd &
3rd comp.
0.0040
0.0060
0.0080
Clearance in groove – oil
control
0.0015
0.0030
0.0080
Gap
0.0100
0.0200
0.0400
VALVE, INTAKE:
Head diameter
1.6825
1.6925
Stem diameter
0.3725
0.3735
Stem to guide clearance
0.0025
0.0005
0.0025
0.0050
Stem to rocker arm clearance
– hot
0.0150
Seat diameter in head
1.6470
1.6530
Seat width in head
7/64
1/8
Top of valve recessed below
cyl. hd deck
0.0210
Valve seat angle
30°
VALVE, EXHAUST:
Head diameter
1.4950
1.5050
Stem diameter
0.3725
0.3732
0.0025
Stem to guide clearance
0.0015
0.0035
0.0060
Stem to rocker arm clearance
- hot
0.0150
Seat diameter in head
1.4510
1.4560
Seat width in head
7/64
1/8
Top of valve recessed below
cyl. hd deck
0.0210
Valve seat angle
45°
VALVE GUIDE:
Length
2.0325
2.9524
Outside diameter
0.6265
0.6270
Bore diameter - intake -
ream
0.3740
0.3750
0.0030
Bore diameter – exhaust –
ream
0.3750
0.3760
0.0030
Depth below cyl. head deck
1.3700
1.3800
TAPPET, VALVE LIFTER
(PUSH ROD):
Body diameter
0.7485
0.7490
Overall length
2.2450
0.0030
2.2550
Clearance m bore (block)
0.0005
0.0015
0.0050
VALVE SPRINGS - INTAKE
& EXHAUST:
Free Iength
1.7960
1.8360
Total coils
6-1/4
Diameter wire
0.1770
Outside diameter
1.2920
1.3020
Test load at 1.4920 inches
(Ibs)
72
82
Test load at 1.0820 inches
(lb)
163
180
1-15
