TM 5-6115-465-34
NAVFACP-8-625-34
T.O. 35C2-3-446-2
TM 06858B/06859D-34
Table 1-1. FITS AND TOLERANCES (CONT)
Component
Mfg's Tolerances
Desired Clearance
Maximum
Maximun
Minimum
Maximum
Minimum
Maximum
Allowable
Allowable
Wear
Clearence
PISTON RING:
Keystone
Clearance in groove - top
Taper
Clearance in groove - 2nd &
0.0040
0.0060
3rd comp.
0.0080
Clearance in groove - oil
0.0015
control
0.0030
0.0080
0.0100
Gap
0.0200
0.0400
VALVE, INTAKE:
1.6825
1.6925
Head diameter
0.3725
0.3735
Stem diameter
0.0025
0.0005
0.0025
Stem tO guide clearance
0.0050
Stem to rocker arm clcarance-
0.0150
hot
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:
1.4950
1.5050
Head diameter
0.3725
0.3732
0.0025
Stem diameter
0.0015
0.0035
0.0060
Stem to guide clearance
0.0150
Stem to rocker arm clcarance-
hot
Seat diameter in head
1.4510
1.4560
Seat width in head
7/64
1/8
Top of valve recessed below
0.0210
cyl. hd deck
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
0.0030
Overall length
2.2450
2.2550
Clearance in bore (block)
0.0005
0.0015
0.0050
VALVE SPRINGS - INTAKE &
EXHAUST:
1.7960
Free length
1.8360
Total coils
6-1/4
Diameter wire
0.1770
Outside diameter
1.2920
1.3020
Test load at 1.4920 inches (lbs)
82
72
Test load at 1.0820 inches (lbs)
163
180
C h a n g e 12 1-9
