Service manual

ENGINE DISASSEMBLY
31. Remove the rear oil seal.
32. Remove the connecting rod bearing caps.
33. Remove the piston and connecting rod assemblies from
the top of the cylinder block.
34. Remove the main bearing caps.
NOTE: Mark the bearing caps to insure properr~~sembly.
35. Remove the crankshaft.
CRANKSHAFT
\ ASSEMBLY .
REMOVING THE
VALVES
36. Remove each valve from the cylinder head assembly.
Use an appropriate valve spring compressor to aid: in
disassembly. Arrange or label valves so as to replace
them in the cylinder and the guide from which they
were removed.
37. Disassemble the rocker arm assembly.
38. Disassemble the piston assembly.
a. Using the piston ring remover, remove the
piston rings.
b. Remove the wrist pin snap rings.
'c. Using a nylon drift, drive the wrist pin from the piston
and rod.
\ PISTON
I;IST~N RING:
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[lARGE END
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L PISTON ASSEMBLY . \
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d. Protecting your eyes with safety glasses, disengage
and withdraw the snap rings. Although mechanics
generally press out (and sometimes hammer out)
pistons pins, these practices should be discouraged.
Instead, take the time to heat the pistons, either with a
heat gun or on a hot plate. Pins will almost fall out.
e. While the piston is still warm, check for bore
integrity. Insert the pin from each side. If the pin binds
at the center, the bore might be tapered; if the bore is
misaligned, the pin will click or bind as it enters the
\ far boss.
\ NOTE: The number stamped on the rod shank and cap should
1\ correspond to the cylinder number. Sometimes these numbers
are scrambled
or missing, and the mechanic must supply
l them. Stamp the correct numbers on the pads provided and,
l,tO prevent confusion, deface the originals.
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Engines & Generators
12