TM 5-3810-306-20
Section I. ROCKER ARM MAINTENANCE
VALVE ADJUSTMENT
TOOLS:
General mechanic’s tool kit: automotive (5180-00-177-7033)
SUPPLIES:
None
EQUIPMENT CONDITIONS:
Disconnect ground cable at shunt. (Refer to page 8-109.)
Valve cover removed. (Refer to page 4-4.)
ADJUSTMENT:
NOTE
Check or set valves while engine is
cold or cool enough to touch.
1.
LOCATE TOP DEAD CENTER (TDC) FOR
CYLINDER NUMBER 1.
a.
Bar engine with 1/2 inch breaker bar, until
Number 1 cylinder is at top dead center.
b.
Ensure top dead center pin engages in
camshaft gear housing.
c.
Disconnect pin when top dead center is
located.
2.
ADJUST VALVES INDICATED FOR STEP A (I
= INTAKE; E = EXHAUST).
a.
Loosen locknut (1). Loosen or tighten
adjustment screw (2) until a slight
resistance is felt when feeler gauge (3)
is slipped between valve stem (4) and
rocker lever (5). Tighten locknut to 18 ft-
lbs (24 Nm) then recheck clearance.
b.
Adjust intake valve clearance to .012 inch
(.30 mm).
c.
Adjust exhaust valve clearance to .024 inch
(.61 mm).
4-2
