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PART 8-2- 200, 250 C.I.D. SIX CYLINDER ENGINES
8-35
INSTALLATION
1. Clean the oil pump inlet tube
scr~en,
and the oil pan and block
gasket surfaces.
2. Oil the piston rings, pistons and
FIG. 34-
Typical
Connecting Rod Side
Clearance
cylinder walls with light engine oil.
3. Be sure to install the pistons in
the same cylinders from which they
were removed, or to which they were
fitted. The connecting rod and bear-
ing caps are numbered from 1 to 6
beginning at the front of the engine.
The numbers on the connecting rod
and bearing cap must be on the same
side when installed in the cylinder
bore. If a connecting rod is ever
transposed from one block or cylin·
der to another, new bearings should
be fitted and the connecting rod
should be numbered to correspond
with the new cylinder.
4. Make sure the ring gaps are
properly spaced around the circum-
ference of the piston. Install a piston
ring compressor on the piston and
push the piston in with a hammer
handle until it is slightly below the
top of the cylinder (Fig. 33). Be
sure to guide the connecting rods to
avoid damaging the crankshaft jour-
nals.
Install the piston with the notch
in the piston head toward the front
of the engine.
5. Check the clearancP. of each
bearing
following
the
procedure
und"r "Connecting Rod Bearing Re-
placement."
6. After the bearings have been
fitted, apply a light coat of engine
oil to the journals and
bearings.
7. Turn the crankshaft throw to
the bottom of its stroke, then push
the piston all the way down until the
connecting rod bearing seats on the
crankshaft journal. Install the con-
necting rod
cap.
Torque the nuts to
specifications.
8. After the piston and connect-
ing rod assemblies have been in-
stalled, check the connecting rod
side clearance on each crankshaft
journal (Fig.
34).
~
r
'
INSERT
ERED PILOT
PISTON PIN
Tool- T68P-6 J 35
.
A
Cup Detail
J
FIG. 35 -
Removing Piston Pin
9. Prime the oil pump. Install the
oil pump and the oil pump inlet
tube. Install the oil pan and related
parts.
10. Install the cylinder head by
following steps 1 through 17 under
Cylinder Head Installation.
11. Fill the crankcase.
12. Start the engine and check
for oil
pressure.
Operate the engine
at fast idle and check for oil and
coolant
leaks.
13. Check and adjust the ignition
timing, engine idle speed and the
fuel mixture.
14. Install the air cleaner.
DISASSEMBLY
1. Remvve the bearing inserts
from the connecting rod and cap.
2. Mark the pistons and pins to
assure assembly with the same rod
and installation in the same cylin-
ders from which they were removed.
3. Remove the piston pin from
the piston and connecting rod usinl
the tool shown in Fig. 35. Remove
the piston rings.
CLEANING AND INSPECJ'ION
Refer to page 8·18 for the cleaning
and inspection procedures.
FIG.
36
-Typical
Piston,
Connecting Rod and
Related Parts
REPAIRS
To fit new pistons, pins or rings,
refer to page 8-14
ASSEMBLY
The piston, connecting rod and
related parts are shown in Fig.
36.
Check the fit of a new piston In the
cyUnder bore before assembUog the
piston and piston pin to the connect-
Ing rod.
The piston pin bore of a connect·
ing rod and the diameter of the pis-
ton pin must be within specifica-
tions. Refer to page 8-69.
1. Apply a light coat of engine
oil to all parts. Assemble the piston
to the connecting rod with the on
squirt hole In the connectblg rod
and the indentation in the piston
positioned as shown in F1g. 37.
2. Start the piston pin in the piston
and connecting rod (this may require
a very light tap with a mallet). Using
an Arbor Press, press the piston pin
through the piston and connecting
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