Figure 31. Camshaft, bearings, tappets, and tappet guides, exploded view.
raised position and remove the camshaft.
101. Camshaft, Bearings, Tappets, and Tappet
Remove the 12 valve tappets (7, fig. 31)
h.
Guides Removal
from their guides in the block.
Remove the oil cooler and tappet cover (TM
a.
Do not replace the tappet guides (8) unless
i.
5-3820-20-20/2).
they are worn or damaged. Measure the diameter of the
Remove the timing gears and end plate
b.
guides with an inside micrometer. The proper diameter
assembly (par. 85).
is 0.4985 to 0.4995 inch. If the guides are worn more
Remove the tachometer drive (TM 53820-
c.
than 0.5015 inch press the guides from the engine
205-20/2).
block.
Remove the cylinder head and valves (par.
d.
Do not replace the camshaft bearings (2, 3,
j.
4, 5, and 6) unless they are worn or otherwise damaged.
Measure the bearings with an inside micrometer. The
Remove the oil pump assembly (par. 93).
e.
proper diameter is 2.2495 to 2.2500 inches. If the
Refer to figure 24 and remove the camshaft
f.
bearings are worn greater than 2.2515 in. remove the
thrust plate.
bearings by pressing them out of the engine block.
Secure the valve tappets (7, fig. 31) in a
g.
AGO 3456A
65