TM 5-4310-387-14
5-29. Engine Cylinder Head Assembly
This task covers:
a.
Adjust
b.
Replace.
c.
Repair
INITIAL SETUP
Tools
Equipment Condition
General Mechanic's Tools Kit (NSN 5180-00-177-7033)
Air cleaner removed (para. 4-26).
Valve Spring Compressor (NSN TBD)
Muffler removed (para. 4-27).
Valve Seat Reamer Tool (P/N 69604)
Fuel injector removed (para. 5-27)
Valve Seat Reamer (45°) (P/N 84343)
Wrench, Torque (NSN 5120-00-554-7292)
Reference
Materials/Parts
Appendix F Torque Values
Gasket
Cylinder Head Assembly
Rags, (Wiping, (Item 19, Appendix E)
Solvent, Dry Cleaning (Item 21, Appendix E)
a.
Adjust. (figure 5-41)
(1)
Remove two nuts (1), valve cover (2), and gasket (3). Discard gasket (3).
(2) Set compression release mechanism (4) to run position.
(3)
Rotate engine until exhaust valve rocker (5) is fully open.
(4)
Measure gap between intake rocker (6) and valve stem (7). Measurement should be 0.004 in. (0.1 mm).
(5)
Loosen locknut (8) and turn adjuster (9) until there is a slight drag felt on feeler gage.
(6)
Hold adjuster (9) and tighten locknut (8). Recheck measurement and readjust if necessary.
(7)
Rotate engine until intake valve rocker (6) is fully open.
(8)
Measure gap between exhaust valve rocker (5) and valve stem (10). Measurement should be 0.004 in. (0.1
mm).
(9)
Loosen locknut (11) and turn adjuster (12) until there is a slight drag felt on feeler gage.
(10)
Hold adjuster (12) and tighten locknut (11). Recheck measurement and readjust if necessary.
(11)
Install valve cover (2) and new gasket (3) and secure with two nuts (1).
5-88
