1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

3 - 14 ENGINE
5. Oil the shim freely with light engine oil and Install the
bearing and bearing cap to the block with the shim
equally spaced on the bearing. Tighten to 75 foot lbs.
6. Rotate the crankshaft one-half turn by hand; if the
crankshaft drags or if the crankshaft cannot be turned by
hand with a .002" shim in place, but turns freely without
the .002" shim it indicates that the clearance is more than
.0015" and that the standard size bearing can be used. If,
however, the crankshaft turns freely without any drag, it
indicates that the bearing which has the .002" shim stock
is too loose.
7. If bearing is too loose in paragraph 6, remove the .002"
shim and insert a .003" shim as a checking gauge; now if
bearing drags when crankshaft is turned by hand a .001"
undersize bearing can be used.
NOTE: The same procedure can be used for checking .002" ,
.010" or .012" undersize bearings keeping in mind that the
.0005" to .0015" clearance must be maintained.
Main bearings for the 6 cylinder engines are furnished in
standard size and .001", .002", .010" and .012" undersizes.
Bearing upper and lower halves are interchangeable.
However bearing No. 1 is not interchangeable with No. 2, 3
or 4. Bearing shells are stamped with the part number or
size. Bearings should be replaced in pairs; never use a new
bearing half with an old bearing half.
CAUTION: No. 2 and No. 3 bearing caps can be reversed
in error. Always place punch marks on the caps and the
block before removal to insure proper Installation.
1. After the proper bearing sizes have been selected, start the
upper shells in place, and with KMO-734 Bearing Shell
Remover and Replacer Tool entered in oil hole of crankshaft
and with hinged head of Replacer against bearing
end, rotate crankshaft, pulling the bearing into position,
Figure 14.
NOTE: The bearing shells are held in position by a raised
tongue in the bearing shell which fits into a machined groove
in the bearing cap. When Installing the upper shells, the end
opposite the notched end should be entered first. When
Installing
Installing the bearing cap, the end with the machined
groove should be on the same side and next to the corresponding
groove in the cylinder block.
MAIN BEARING, CRANKSHAFT,
AND CAP BORE DIAMETERS
BEAR-
ING
SIZE
Standard
.001 U.S.
.002 U.S.
.010 U.S.
.012 U.S.
SHELL
THICK-
NESS
.0955
.0952
.0960
.0957
.0965
.0962
.1005
.1002
.1015
.1012
(6 CYLINDER)
CRANK-
SHAFT
DIAMETER
2.4998
2.4988
2.4998
2.4988
2.4978
2.4973
2.4898
2.4893
2.4878
2.4873
CAP
BORE
DIAMETER
2.692
2.691
2.692
2.691
2.692
2.691
2.692
2.691
2.692
2.691
REAR MAIN BEARING CAP
Installation:
Check the rear bearing cap oil seal and if replacement of
the seal is necessary, proceed as follows:
1. Crowd the seal material into the outer groove of the bearing cap
by hand and with Main Bearing Oil Seal Installer J-2779, drive
the seal tightly into the groove by tapping handle of tool with a
bronze hammer, Figure 16.
NOTE: Large diameter of the tool cylinder should be to the front of
cap with the lesser dimension compressing the seal at rear of cap.
2. After the seal has been properly seated in the bearing cap and in
the block, and while the tool is still compressing the seal, cut the
seal off flush with the top face of the cap. Make a good clean
straight cut so that no f r ay e d ends will be clamped between
upper and lower caps. DO NOT CUT SEAL TOO SHORT.
The seal must entirely fill the groove; otherwise an oil leak will
occur.