TM 5-3805-280-24-2
Cylinder Head and Valves
05
Item
Measurement
Specification
9
Cylinder Head Thickness and Finish
New Cylinder Head Thickness
104.87--105.13 mm (4.129--4.139
in.)
Minimum Acceptable Thickness
104.24 mm (4.104 in.)
Combustion Face Surface Finish
0.7--3.2 micrometers (31--125
(Surface Grind Only) (AA)
micro-in.)
Maximum Wave Depth
0.012 mm (0.0005 in.)
Maximum Material Removal for
0.76 mm (0.030 in.)
Resurfacing
Valve Guide Bore (New)
ID
7.912--7.938 mm (0.312--0.313 in.)
Valve Guide-to-Valve Stem (New)
Clearance
0.05--0.10 mm (0.002--0.004 in.)
Wear Limit
0.15 mm (0.006 in.)
30
Valve Seat Grinding
Valve Seat Angle (D)
Valve Seat Width (E)
1.50--2.00 mm (0.059--0.079 in.)
Maximum Valve Seat Runout (F)
0.08 mm (0.003 in.)
Cylinder Liner Height Above Block
Height
0.030--0.100 mm (0.001--0.004 in.)
Cylinder Liner Height Difference At
Maximum Permissible Height
0.05 mm (0.002 in.)
Nearest Point of Two Adjacent
Difference
Liners, or Within a Single Liner
Cylinder Head Cap Screws
Step 1-Initial Torque
Torque
100 Nm (75 lb-ft)
Step 2-Second Torque
Torque
150 Nm (110 lb-ft)
Step 3-Verify Torque (After 5
Torque
150 Nm (110 lb-ft)
Minutes)
Step 4-Torque Turn
Torque Turn
Tighten each screw an additional
60 10 )
Rocker Arm Support Studs
Torque
80 Nm (60 lb-ft)
Rocker Arm Cover Nuts
Torque
35 Nm (26 lb-ft)
DPSG,OUO1004,229
1910JUL983/3
13-67
