journal should be 1.2465-to 1.2475-inches. Replace
and camshaft bearing which should be 0.002-to 0.004-
camshaft whose journals are worn 0.001 inch more
inch.
If clearance exceeds 0.004 inch, replace
than the minimum diameter.
bearings.
(4) Measure inside diameters of the camshaft
(3) Check camshaft end play. Mount a dial
bearings. The inside diameter of the front bearing
indicator on the engine with indicator pointer resting
should be 1.8745-to 1.8755-inches.
The front
against camshaft gear. Move gear and shaft to their
intermediate should be 1.8115-to 1.8125-inches. The
limits of travel and observe dial indications. End play
rear intermediate should be 1.7495-to 1.7502-inches.
should be 0.005-to 0.009-inch. If end play exceeds
The rear bearing should be 1.2495-to 1.2505-inches.
0.009 inch, replace thrust washer (fig. 5-4).
c. Installation.
(4) Install oil pump (para 5-6).
(5) Install timing gears (para 5-4).
(1) Install bearings and camshaft as illustrated in
(6) Install valves (para 5-7).
figure 5-11.
(2) Check clearance between camshaft journal
Section VI. BLOCK
5-11. General
5-12. Block
The engine block is a solid, one-piece, iron alloy casting.
a. Disassembly.
It houses the crankshaft, camshaft, connecting rods,
pistons, and valves. The block has full length water
(1) Remove crankshaft (para 5-9).
jackets around the cylinders and has water passages
(2) Remove camshaft (para 5-10).
around the valves for cooling. Drilled oil passages carry
(3) Remove flywheel housing (para 5-2).
oil under pressure to all bearings and moving parts
(4) Remove and disassemble parts from engine
requiring lubrication.
block as shown in figure 5-12.
1.Plug, expansion (9)
9 Plug (3)
2 Stud (3)
10 Stud
3 Draincock
11 Stud (8)
4 Stud (3)
12 Stud (2)
5 Stud
13 Stud (2)
6 Bushing
14 Plug
7 Stud (2)
15 Engine block
8 Stud
Figure 5-12. Engine block. exploded view.
5-14
