Engine Block and Cylinder Sleeve

(13) Install the connecting rod bearings in the

connecting rods, and connecting rod caps. Pull the

connecting rods against the crank pins. Install the

connecting rod caps on the connecting rods; secure with

two capscrews. Tighten the capscrews to 57-59 ft-lbs of

torque.

(14) Assemble the remaining engine parts and

accessories in reverse order of disassembly.

6-19. Engine Block and Cylinder Sleeve

a. General. The engine block is the most

important and largest engine component. Every other

engine component is attached, or function is related,

directly to the engine block. The engine block is

equipped with cylinder sleeves.

b. Removal.

MEC 4320-240-15/6-26

(1) Refer to paragraph 6-11b and remove the

manifold.

Figure 6-26. Dampener and pulley

removal and installation.

(2) Refer to paragraph 6-12b and remove the

cylinder head.

(d) Try to turn the crankshaft by hand. If the

crankshaft will not turn or a definite drag is felt, bearing-

(3)

Refer to paragraph 6-18b and remove

to-bearing journal -clearance is within tolerance.

crankshaft and camshaft.

(7) After all main bearings have been installed,

(4) Refer to paragraph 3-50b and remove water

check crankshaft end play using a dial indicator. If end

pump.

play is not between 0.003 and 0.007 inch, replace the

front sleeve bearing.

(5)

Refer to figure 3-20 and remove the

generator.

(8) If the camshaft gear has to be replaced.

Removal of the gear from the camshaft requires an

(6)

Make sure all engine accessories and

arbor press and a suitable support plate to hold the gear.

components are removed, refer to chapter 6 section I

Do not attempt to remove the gear by makeshift

and chapter 6 section II and remove all components and

methods that may distort the shaft or gear.

accessories.

(9) Install the camshaft bearing journals and

(7) Remove cylinder sleeves, using sleeve puller.

camshaft bearings with feeler stock cut in strips inch

wide. Dress the feeler stock with a stone to eliminate

c. Cleaning and inspection.

burs or feathered edges.

Clearance between the

bearings and journals must be between 0.0015 and

(1) Remove dirt and grease deposits from the

0.003 inch.

block with a putty knife. Steam-clean the block.

(10) If clearance exceeds 0.003 inch, remove the

(2) Inspect the block for cracks, damaged sealing

camshaft from the block and install new camshaft

surfaces, scored or damaged bearing sets, damaged

bearings. The camshaft bearings are presized and do

threads, loose or damaged studs, corrosion in the water

not have to be honed after installation.

jacket, or other defects.

(11) Install the camshaft (fig. 6-30). Make sure

(3) Refer to paragraph 6-16d and check piston fit

the timing marks on the crankshaft gear and camshaft

in cylinder sleeve.

gear line up.

(4) Check cylinder sleeve wear with an inside

(12) Check the crankshaft and camshaft gears for

micrometer. Measure the cylinder bore

backlash. The backlash must be .002 - .004.

6-24