Cadillac 60 Series 1963 Shop Manual page 221

9-28
ENGINE MECHANICAL
Upper Bearing Half
2 . s,3 i 4
T.
i
I
T
a M - 1 0 0 Babbitt
S M - 4 0 0 Aluminum
L
°
W e r Bearing Hdf
Fig. 9-31 Main Bearing Location
8 are on right side of engine, and that rods are
on proper crankpins.
6. Install rod cap nuts and tighten to 40 foot-
pounds.
7. Check connecting rod end play on crankpin
by tapping the two rods apart at crankpin and
checking with feeler gage. An .008 inch feeler
gage should always enter space between rod
passes at crankpin; a .015 inch feeler gage should
never enter.
8. Install oil intake screen assembly on cylin-
der block, using new gasket, and secure with three
attaching screws. Tighten screws to 18 foot-
pounds.
9. Install oil pan as described in Note 19b.
10. Install cylinder heads as described in Note
13.
28. Main Bearing
Clearance Checking
Shell type main bearings of steel-backed alumi-
num and steel-backed babbitt are used in all 1963
engines. Proper location for these bearings is
shown in Fig. 9-31. No. 1 upper and lower bear-
ing halves are interchangeable. No. 2, 4, and 5
upper bearing halves and No. 5 lower bearing half
are interchangeable. No. 2 and 4 lower bearing
halves are interchangeable. No. 3 upper and lower
bearing halves are not interchangeable. The
crankshaft end thrust is taken by the center main
bearing. The worn limit for crankshaft end play
is .010 inch.
To check a main Bearing:
1. Remove bearing cap as described in Note 29.
2. Measure bearing wear using the "Plasti-
gauge" Method as described in Note 21. Bearing
cap must be tightened to 95 foot-pounds.
CAUTION: If bearings are being measured
with engine in chassis, crankshaft must be sup-
ported in order to take up clearance between
upper bearing shell and crankshaft. This can be
done by removing bearing caps adjacent to
bearing being checked, and placing a strip of
.005 inch brass shim stock between lower bear-
ing shell and crankshaft bearing journal. When
reinstalling bearing caps, lightly tighten attach-
ing screws to avoid damaging bearing caps.
3. If bearing clearance is greater than .0045
inch replace bearing as described in Note 29.
4. If new bearings do not reduce the clearance
to less than .0045 inch crankshaft should be
replaced.
If both new bearings and new crankshaft are in-
stalled, clearance should be .0008 inch to .0029
inch for all bearings except front bearing. Clear-
ance for front bearing should be .0005 inch to
.0023 inch.
29. Main Bearing Replacement
1. Remove engine oil pan as described in Note
19a.
2. Remove three cap screws that hold oil in-
take screen assembly to cylinder block and
remove screen assembly. Discard gasket.
3. Remove spark plugs.
4. Remove two cap screws that hold bearing cap
to cylinder block and remove cap. Remove worn
shell from cap and discard.
NOTE: Each bearing cap has a number (1,
2, 3, or 4) stamped on the bottom starting from
the front. Do not mismatch these caps or turn
them around because they are individually
matched when the cylinder block is machined.
5. Install Upper Bearing Shell Remover,
J-8080, into oil hole in crankshaft bearing journal,
Fig. 9-32.
Upper Bearing
Shell Remover J-8080
Fig. 9-32 Upper Bearing Shell Removal