Cylinder Block; Oil Seal To Retainer Installation - Ford 1956 Truck Shop Manual

Section 7-Flywheel, Crankshaft, and Main Bearings
27
faces of both halves of the bearing. Retain the forward
pressure on the crankshaft, and tighten the cap bolts
to specifications (fig. 37). Check the crankshaft end play.
(4)
REPLACING REAR MAIN BEARING CRANK-
SHAFT 011, SEALS.
Remove the crank. haft journal
oil seals from the cylinder block and seal retainer, or
bearing cap. Clean the seal grooves.
Install a new seal in the cylinder block as shown in
fig. 38. After installation, cut the seal flush without any
frayed edges overlapping. Install the new journal seal
in its retainer or bearing cap as shown in fig. 39. After
installation cut the seals flush.
Coat the rear oil seal retainer to block mating face
with sealer, install the retainer and tighten the bolts to
23-28 foot-pounds torque. Dip the side seals in light
engine oil, then immediately install them in the grooves.
It
may
be necessary to tap the seals into place for the
last
1f2
inch of travel. Do not cut the seal projecting ends.
CAUTION:
Do nol u.e sealer on the side .eal •. The
$eal& are de&igned to expand when dipped in oil.
V$ing sealer may retard this expansion.
To check retainer or bearing cap side seals for leaks,
squirt a few drops of oil into the parting lines between
the cap or retainer and the cylinder block from the out-
side. Blow compressed air against the seals from the
inside of the block. If air bubbles appear in the oil, it
(223 OR 272 CUBIC
INCH ENGINE)
T52T-670J-AJD
(302 OR 332 CUBIC
INCH ENGINE)
6639
fig.
39-0il Seal
10
Re/ainer Ins/allalion-Typical
indicates possible oil leakage.
NOTE: The above le.1 .hould nol be performed on
newly installed seal& until sufficient lime ha, been
allowed Jor the seals to expand into the &eal groove ••
8. CYLINDER BLOCK, PISTONS, PISTON RINGS, AND CONNECTING
RODS AND BEARINGS
During the disassembly of the cylinder block for
engine overhaul, closely inspect the wear pattern on all
parts to help diagnose the cause of wear_
a. Cylinder Block.
Clean o ld gasket material from all machined surfaces.
Remove the pipe plugs which seal oil passages and clean
all passages thoroughly.
(1) INSPECTION. Make a thorough check for cracks.
Minute cracks not visible to the naked eye may be
detected by coating the suspected area with a mixture of
25% kerosene and 75% light motor oil. Wipe the part
dry and immediately apply a coating of zinc oxide dis-
solved in wood alcohol. If cracks are present, the coating
will become discolored at the defective area_
Make sure the threads in the head bolt holes are
clean_ Dirt in the threads can cause binding and result
in a false torque reading_ Use a tap to true up threads
and to remove deposits if necessary.
Inspect the cylinder bores for scoring, taper, out of
roundness, and wear. Use a cylinder bore gauge to make
the measurements (fig. 40). Follow the instructions of
the tool manufacturer. Only experienced personnel
should be permitted to take these measurements.
Inspect all expansion-type plugs for evidence of
leakage.
(2) REPAIRS.
To remove an expansion-type plug,
drill a
' 1 2
inch hole in the center of the plug and remove
the plug as shown in fig. 41. Clean the plug recess
thoroughly. Coat the flange of the new plug with sealer
and install it with the flange facing out. Drive the plug
in until the flange is flush or slightly below the casting
surface (fig. 42).
NOTE:
A 0.030 inch oversize plug i. atmilable.
Rebore cylinders that are deeply scored and when
taper and / or when out-of-roundness are excessive_ If
the cylinder bore and piston wear are not excessive, new
service piston rings will give satisfactory performance.
(3) BORING CYLINDER BLOCK.
Follow the bor-
ing equipment manufacturer's instructions. This work
should be performed by experienced personnel only.
Bore the cylinder with the most wear first to deter-