(3) Remove the two screws (59) and
for runout. The total indicator reading
lockwashers (58) that secure the filler
must not exceed 0.002 inch. Clean the
block (57) to the block; remove the screws
valve seat and surrounding area
(49 and 50) and lockwashers (48 and 51)
thoroughly after grinding.
that secure the filler block to the front end
(10) After the valves and seats have been
cover; remove the filler block and seal
refaced and reground, coat the seat lightly
(60).
with Prussian blue and drop the valve into
(4) Remove the two screws (65) and
place, oscillating it slightly to transfer the
lockwashers (66) that secure the filler
blue pattern to the valve face. This
block (67) to the block; remove the filler
should show a contact width of 1/16 to
block and seals (64 and 68).
3/32 inch, and should fall well within the
b. Cleaning and Inspection.
width of the valve face, leaving at least
(1) Clean the oil pan and filler blocks in an
1/64 inch on either side of the contact
approved cleaning solvent.
Dry with
area. If the contact area is greater than
clean, dry, compressed air.
3/32 inch, narrow the contact area by
(2) Inspect the oil pan, oil guard, and filler
grinding the outside diameter of seat with
blocks for cracks, damaged threads,
a 15 stone or by grinding the inside
distortion, damaged sealing surfaces, or
s iameter of the seat with a 60 or 75
d
other defects.
tone (fig. 58). After the seat area is
c. Installation.
corrected, touch the seat lightly with the
(1) Install the neoprene seal (64, fig. 56) on
original grinding stone to remove the
the rear filler block (67) by placing a drop
burred or feathered edge.
of nonhardening cement in the middle of
(11) Inspect the spring retainer seats, spring
the seal and pressing the seal into the
retainer locks, valve stem caps, and valve
groove in the filler block in the same
tappet assemblies for cracks, scoring,
manner as for the front filler block (fig.
overheating, and wear.
Replace
damaged parts.
(2) Install the ring seal (68, fig. 56) in the
c. Installation (fig. 59).
rear filler block as follows:
(1) Position the valve tappet assemblies (9,
(a) Flatten the seal in a vise or similar
10, and 11) in the engine block.
device until the seal fits into the
(2) Assemble the valves (2), valve springs
groove in the filler block.
(5), spring retaining seats (6), spring
(b) Roll the seal into the filler block
retaining locks (7), and valve stem caps
groove with a round object.
(8). Compress the valve springs with a
(c) Trim the seal ends flush with the
spring compressor to install the spring
filler block.
retaining locks.
Turn the engine
(3) Lubricate the seals with engine oil. Install
crankshaft as necessary to allow each
the assembled filler block and seals on
valve to move to the closed position
the engine block: secure with the screws
before attempting to install the valve
(65) and lockwashers (66).
parts. Make sure each valve is installed
(4) Install the neoprene seal (60) on the front
in the guide from which it was removed.
filler block (57) by placing a drop of
(3) Temporarily set valve tappet clearance
nonhardening cement on the middle of
the seal and pressing the seal into the
(4) Install the cylinder head (para 115c).
groove in the filler block (fig. 65).
(5) Operate the engine until it reaches
(5) Install the assembled gasket and filler
operating temperature.
Adjust valve
block on the engine block; secure with the
tappet clearance (para 83).
screws (59, 50, and 49, fig. 56) and
117. Oil Pan and Filler Blocks
lockwashers (58, 51, and 48).
a. Removal (fig. 56).
(6) Position the gaskets (56) on the oil pan
(1) Remove the engine (para 114b).
(61). Install the oil pan and gaskets on
(2) Remove the 22 screws (62) and lock
the engine block; secure with the 22
washers (63) that secure the oil pan (61)
screws (62) and
to the block (28); remove the oil pan and
gaskets (56).
TAGO 0358A
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