Cadillac 60 Series 1963 Shop Manual page 217

9-24
ENGINE MECHANICAL
Connecting
Rod Bolt
Connecting
Rod
Bearing Cap
Bearing Inserts
Oil Groove
Fig. 9-24 Connecting Rod and Bearing Assembly
13. Connect positive battery cable.
14. Operate engine and check for oil leaks.
20. Connecting Rod and
Piston Removal
1. Remove cylinder heads as described in
Note 7.
2. Clean carbon from top of cylinder bore.
Ream upper ridges, only if necessary, to prevent
breakage or distortion of piston ring lands due
to rings catching in the ridge. Pack cylinder
bore with cloth to catch shavings.
3. Remove oil pan as described in Note 19a.
4. Remove three cap screws that hold oil intake
screen assembly to cylinder block and remove
intake screen assembly. Discard gasket.
5. Remove connecting rod cap by removing
connecting rod nuts and sliding cap down off
connecting rod bolts, Fig. 9-24.
6. Install Connecting Rod Guide Set, J-3224,
on connecting rod bolts..
CAUTION: Be careful not to damage crank-
shaft or cylinder bore when removing piston
and rod assembly.
7. Push connecting rod and piston assembly
up until piston rings are out of bore, and remove
piston and connecting rod assembly from engine.
CAUTION: Do not nick lower edge of bore
when pushing rod up.
8. Remove remaining seven piston and con-
necting rod assemblies in same manner.
21. Connecting Rod
Bearing Replacement
Worn bearings can be replaced without remov-
ing the rod and piston assembly by removing the
cap and replacing the upper and lower halves.
The clearance between the connecting rod bearing
and the crankshaft can be measured by the use of
a "Plastigauge", as follows:
1. Remove bearing cap and wipe
crankshaft journal and bearing insert.
oil from
2. With crank pin at approximate bottom dead
center, place a piece of "Plastigauge" in center
of cap.
NOTE: When using "Plastigauge", plastic
material and part being measured must be at
room temperature. If parts are excessively
warm, an incorrect reading may result. Fresh
"Plastigauge" is recommended for greatest
accuracy.
3. Reinstall bearing cap. Tighten screws to
40 foot-pounds.
NOTE: It is extremely important to position
tangs on bearings in notches in rod and cap.
4. Remove bearing cap and determine clearance
by comparing width of flattened "Plastigauge", at
its widest point, with graduations on "Plastigauge"
container. Number within matching graduation on
envelope indicates clearance in thousandths of
an inch, Fig. 9-25.
Bearing Insert'
Bearing Cap
Measuring
Scale
Flattened
Plastigage
Fig. 9-25 Checking Bearing Clearance