Assembly and installation.

plunger with a 5/16 inch diameter drill and tap the hole

(2) Remove the cylinder head from the engine

with a 3/8 inch - 16 tap. Using a 3/8 inch screw of

block.

suitable length, the plunger may be pulled from the shaft.

(3) Using a ridge reamer (Figure 6-32),

(6) If new camshaft bearings are needed,

remove the ridge from the top of the cylinder bore.

drive out old bearings with a suitable driver. The driver

may be used to drive in the new bearings: b. Inspection.

NOTE

With shaft installed, use narrow leaf feeler gauge to

check for 0.0025 maximum clearance at camshaft

Ridge must be completely removed

bearings.

to avoid breaking rings, and piston

c. Assembly and installation.

lands between ring grooves. Do not

(1) Insert Woodruff key in shaft.

cut into ring travel area of cylinder

(2) Press camshaft into gear.

wall.

(3) Place a small amount of grease or heavy

oil on the thrust washer and place thrust washer on gear.

(4) Turn crankshaft throws to lowest points,

(4) If thrust plug has been removed, press in

and remove cotter pins and nuts from the connecting rod

new plug.

bolts and remove the lower bearing caps and bearing

Do not damage thrust washer.

halves from the connecting rods. Tap rod with a soft

(5) Drive new bearings into place with driver.

hammer, if required, to remove caps.

These bearings are cut to allow for the press fit when the

(5) Push the connecting rods and pistons

bearings are pressed into the case; therefore, no

(Figure 6-33) out of the top of the bore using a suitable

reaming should be necessary. Be certain to align hole in

piece of wood.

each bearing with oil passage in block.

Use care that the connecting rod does not scratch the

(6) Use care when installing the camshaft that

cylinder wall. To insure against scratching, wrap lower

the cams do not damage the bearings, as this usually

part of rod with a wiping cloth.

causes tight bearings. Be certain to align punch mark on

(6) Temporarily install the connecting rod

camshaft gear with punch mark on crankshaft gear to

bearing caps on the connecting rods from which they

time valves to' crankshaft.

were removed.

(7) Complete installation by installing gear

(7) Using a ring spreader, remove the piston

cover, gasket and oil seal.

rings from the pistons, or simply break rings off, if they

(8) Install any removed external parts and

will not be reused.

install engine in vehicle.

(8) Remove the piston pin retainers and

6-80. PISTONS, CONNECTING RODS AND

remove the pins from the pistons, separating the

BEARINGS.

connecting rods from the pistons. Press the sleeve

a. Description. Each piston has two compression

bearings from the connecting rods, using new bearings

rings and two oil rings. The full floating piston pins are

(Figure 6-34) which will result in installing new bearings

held in place by retaining rings. The connecting rods use

in one operation.

copper-lead lined sleeve bearing pairs. The connecting

rods and the connecting rod bearing caps are matched

and numbered. Numbered sides must face the camshaft

when reinstalled.

Keep each bearing cap with rod from

which it was removed. Caps are not

interchangeable.

b. Removal.

(1) Remove the oil pan.

Figure 6-32. Using Ridge Reamer

106