TM 5-3825-225-14&P
1-37. VALVE AND INJECTOR PUMP TIMING.
See paragraph 5-20.
1-38. CYLINDER HEAD.
a.
Overall Length of Cylinder Head................................... .............................. 20.000 in. (508.000 mm)
b.
Overall Depth of Cylinder Head .......................... ..................... 2.617-2.633 in. (66.472-66.878 mm)
c.
Skimming Allowance on Cylinder Head Face ..... ....... ............... NIL-On no account can the cylinder
head face be skimmed
d.
Pressure for Water Leakage Test .................................................... ....................... 20 psi (138 kPa)
e.
Valve Seat Angle ................................................................................................. ................ ....... 45
f.
Bore in Cylinder Head for Guide ................................... ...... 0.4995-0.5005 in. (12.687-12.713 mm)
g.
Bore in Cylinder Head for Combustion
Chamber Inserts .......................................... ........................ .... 1.250-1.252 in. (31.750-31.801 mm)
h.
Depth of Bore in Cylinder Head for Combustion
Chamber Inserts ........................................ .......................... ........ 0.373-0.376 in. (9.474-9.550 mm)
1-39. COMBUSTION CHAMBER INSERTS.
a.
Outside Diameter of Insert........................................... ............. 1.248-1.249 in. (31.699-31.725 mm)
b.
Depth of Insert................................................................................0.374-0.375 in. (9.500-9.525 mm)
c.
Height of Insert in Relation to Cylinder Head Face ........... ..... 0.002 in. (0.051 mm) Above or Below
d.
Clearance Fit of Insert in Cylinder Head Bore ................................0.001-0.004 in. (0.025-0.102 mm)
e.
Method of Location in Cylinder Head.................................................. .... By Cylinder Block Face and
Expansion Washer
1-40. VALVE GUIDES (INLET).
a.
Inside Diameter ......................................................................... 0.3145-0.3155 in. (7.988-8.014 mm)
b.
Outside Diameter .............................................................. 0.50125-0.50175 in. (12.731-12.744 mm)
c.
Interference Fit of Guide in Cylinder Head Bore ............ ..... ...0.00075-0.00225 in. (0.019-0.057 mm)
d.
Overall Length of Guide ................................................................................ 2.130 in. (54.102 mm)
e.
Face of Cylinder Head ............................................................... 0.800-0.815 in. (20.320-20.701 mm)
1-41. VALVE GUIDES (EXHAUST).
a.
Inside Diameter .......... ...................... ...................... ............... 0.3145-0.3155 in. (7.988-8.014 mm)
b.
Outside Diameter ............................ ................... ............0.50125-0.50175 in. (12.731-12.744 mm)
c.
Interference Fit of Guide in Cylinder Head Bore ........... ..... ....0.00075-0.00225 in. (0.019-0.057 mm)
d.
Depth of Counterbore .................................................... ...................................0.380 in. (9.652 mm)
e.
Overall Length of Guide ......... ..................................... ................................. 2.440 in. (61.980 mm)
f.
Guide Protrusion Above Top Face of Cylinder Head ..................0.800-0.815 in. (20.320-20.701 mm)
1-10
