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9-1 6
ENGlNES4-CYLINDER
NOTE:
Whenever a n engine is rebuilt and a new
camshaft and/or new tappets are installed, one
quart of MoPar Engine Supplement, part Number
1879406
must
be
added t o the engine o i l t o aid in
break-in. T h e o i l m i x t u r e should be l e f t in t h e en-
gine for a minimum o f
500 miles. D r a i n the o i l
m i x t u r e at the next normal o i l change.
NOTE: When replacing the camshaft, a l l o f t h e
tappet faces must be inspected f o r crown
with
a
straight edge.
If
any negative crown (dish) is
ob-
served, the tappet must be replaced. The tappet
must have a definite crown.
l n s t u l l a t i o n
of
D i s t r i b u t o r
as follows:
Before installing the distributor, time the engine
NOTE: The distributor rotates clockwise.
(1) Rotate the crankshaft until the mark on the in-
ner edge of the crankshaft pulley is in line with the
"0" (TDC) mark on the timing chain case cover. No.
1 cyl. compression stroke (both valves closed).
(2) With distributor
"0" rings in position, hold the
distributor over the mounting pad.
(3) Turn the rotor to point forward, corresponding
to
4
o'clock.
(4)
Install the distributor
so
that with the distribu-
tor fully seated on the engine, the gear has spiraled
to bring the rotor to a
5
o'clock position.
(5) Turn the housing until the ignition contacts are
separating and rotor is under
No.
1 cap tower.
(6) Install hold down bolt and connect the primary
wire.
(7) Adjust the timing to specification, using a
tim-
ing light, then connect the vacuum line.
CAMSHAFT BEARINGS
(Engine
Removed from
Vehicle)
Removal
(1) With the camshaft removed, drive out the rear
cam bearing welch plug.
(2) Install the proper size adapters and horse shoe
washers (part of Tool C-3132A) at the back of each
bearing shell and drive out all the bearing shells.
lnstcrllation
(1) Install the new camshaft bearings with Tool
C-3132A by sliding the new camshaft bearing shell
over the proper adapter.
(2) Position the bearing in the tool. Install the
horseshoe lock and drive the bearing shell into place
(Fig. 3 0 ) .
T h e camshaft bearing o i l hole o r holes must
be
in exact alignment
with t h e d r i l l e d o i l passage o r
passages f r o m the main bearing.
(3) Install the remaining shells
in like manner.
In-
stall NO. 1 camshaft bearing
3/32
inch inward f r o m the
front face o f t h e cylinder block.
CAMSHAFT BEARING OIL HOLE
P.
\
.
I
.
. .
Fig. 30-Removing
Camshaft Bearings
uooi
c-3 I
3 2 ~ 1
(4)
Apply sealer
to
the plug and use Tool C-897 to
install a new welch plug at the rear
of
the camshaft.
Be sure this plug does not leak.
CYLINDER BLOCK
(1) Remove the top ridge of the cylinder bores
us-
ing Tool C-3012 before removing pistons from the
cylinder block.
Keep the tops o f t h e pistons covered
during this operation.
(2) Pistons and connecting rods must be removed
from the top of cylinder block. Rotate the crankshaft
so
that each connecting rod is centered in the cylinder
bore.
(3) Remove the connecting rod cap.
(4) Install Tool (2-3221 on one connecting rod bolt
and protector over the other bolt. Push each piston
and rod assembly out of cylinder bore.
Be careful not to nick the crankshaft journals.
(5) Install the bearing caps on the mating rods.
TESTING CYLINDERS
Inspection
The cylinder walls should be tested for out-of-round
and taper with Tool C-119. If the cylinder bores show
more than .005" out-of-round, or a taper of more than
.010" or if the cylinder walls are badly scuffed or
scored, the cylinder block should be rebored and
honed, and new pistons and rings fitted. Whatever
type of boring equipment is used, boring and honing
operation should be closely coordinated with the fit-
ting of pistons and rings in order that specified clear-
ances may be maintained.
Honing Cylinder
Bores
Before honing, stuff plenty of clean rags under the
bores, over the crankshaft to keep the abrasive ma-
terials from entering the crankcase area.
(1) Used carefully, the cylinder bore resizing hone
Tool C-823, equipped with 220 grit stones, is the best
tool for this job. In addition to deglazing, it will re-
duce taper and out-of-round as well
as
removing light
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