Checking Bearing Clearance; Seal To Rear Bearing Cap Installation; Cutting Rear Bearing Cap Seal - Lincoln Continental 1964 Shop Manual

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recommended that two blue bear-
ing inserts be used first to obtain
the proper clearance. Make cer-
tain the oil holes are clear. Install
the upper half of the bearing insert
over the crankshaft on the locking
tang side of the crankshaft main
bearing web and rotate the insert
into position as far as possible, then
use tool 6331-E to fully seat the in-
sert (Fig. 36).
9. Support
the weight of the
crankshaft with a small jack posi-
tioned to bear against the crankshaft
counterweight adjoining the bearing
which is being checked for clear-
ance. Crankshaft support is nec-
essary when checking main bear-
ing clearances in order to prevent
the crankshaft weight from com-
pressing the Plastigage, which
would provide an incorrect read-
ing.
10. Place a piece of Plastigage,
the full width of the bearing surface
on the crankshaft journal, about
~
inch off-center (Fig. 38). Place the
lower bearing insert in the cap. In-
stall the bearing insert and cap.
Torque the bolts to specifications.
Do not rotate the crankshaft while
making checks with Plastigage.
11. Remove the bearing c:ap and
PLACE Plostigoge FULL
WIDTH OF JOURNAl
ABOUT
1,4
INCH
OFF-CENTER
CHECK WIDTH
OF Plostigoge
0.002"
CLEARANCE
MEASURING Plastigoge
fiG.
38-Checking
Bearing Clearance
A1863-A
PART 8-2-430 V-8 ENGINE
the lower insert, but do not disturb
the Plastigage. Compare the width
of the flattened Plastigage at its wid-
est point with the scale printed on
1
he Plastigage envelope to obtain
the minimum bearing clearance (Fig.
~
8).
Check the Plastigage at its nar-
rowest point to obtain the maximum
bearing clearance. The difference be-
tween the minimum and maximum
hearing clearance is the taper of the
Journal.
If the taper or out-of-round spe-
cification exceeds the allowable lim-
Its, the crankshaft must be removed
and the journal ground to size for the
next undersize bearing.
If the bearing clearance is greater
than the specified limit, it will be
necessary to remove the crankshaft
'md grind the journal to size for the
next undersize bearing.
If the clearance is less than the
~pecified
limit, try two red bearing
inserts or a combination of red and
hlue, depending on the condition.
Any combination of the standard
red and/ or blue bearing inserts
may be used to obtain the desired
results.
12. Aftt"!r each bearing has been
checked and found to be satisfactory,
apply a light coating of engine oil to
the bearing and journal, then install
the lower bearing insert and cap.
Tighten the retaining bolts to 95-105
tt-lbs torque.
''<.· . .
l1.·'·/··.· ... · . . . · ..
~ . :
-
'
~·-··:·'
'
'
FIG.
39-Seal to Rear
Bearing Cap Installation
A1855-A
8-37
13. Repeat the procedure for the
remaining main bearings which re-
quire replacement.
14. If the rear main bearing is to
be replaced, remove the rear main
bearing cap. Remove and discard.the
rear seal and side seals.
15. Clean the rear journal oil seal
groove.
16. Install a new rear journal oil
seal in the rear main bearing cap
(Fig. 3 9). After installation, cut the
ends of the seals flush (Fig. 40).
17. Apply a thin coating of oil-
resistant sealer to the rear main
bearing cap at the rear of the top
mating surface. Do not apply sealer
to the area forward of the side
seal groove. Install the rear main
bearing cap. Torque the cap bolts
to specifications.
18. Dip the side seals in light
engine oil, then immediately install
them in the grooves. Do not use
sealer on the side seals. The seals
are designed to expand when
dipped in oil. Using sealer may
retard this expansion. It may be
necessary to tap the seals into place
for the last
1f2
inch of travel. Do not
cut the seal projecting ends.
19. Check the retainer side seals
for leaks by squirting a few drops
of oil into the parting lines between
the rear main bearing cap and the
cylinder block from the outside.
Blow compressed air against the
seals from the inside of the block.
If air bubbles appear in the oil, it
indicates possible oil leakage. This
test should not be performed on
newly installed seals until suffi-
cient time has been allowed for
the seals to expand into the seal
grooves.
FIG.
40-Cutting Rear
Bearing Cap Seal
A18S6-A