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Page Title:
FIGURE 321. LOCATION OF CORE HOLE PLUGS BEHIND ENGINE NAME PLATE. |
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 a . Cleaning. Refer to paragraph 152b and c
forgeneral instructions on cleaning the cylinder
p i n s securing name plate to cylinder
and crankcase. Clean the twelve main bearing
a n d crankcase. (B) Remove nameplate
halves (KK and QQ) and the two thrust bearing
t o inspect core hole plug (fig. 321).
halves (LL and PP) by washing them in dry-
Inspect plug as described in par. 159b(8).
cleaning solvent or mineral spirits paint thinner.
Note. Do not remove name plate unless
Use a stiff brush or wooden scraper to remove
i n s p e c t i o n indicates a coolant leak at
sludge or gum deposits from bearing grooves or
o i l holes. Care must be taken not to remove
core hole plug behind name plate. Rust
or scale will be evident on side of en-
bearing identification markings made when bear-
ings were removed during engine disassembly.
gine below name plate if leak is present.
T h o r o u g h l y clean cylinder and crankcase oil
passages using compressed air and brass wire
p r o b e s as directed in paragraph 152d. Flush
cylinder and crankcase water jacket thoroughly.
b. General Inspection.
(1) C a s t i n g s . I n s p e c t t h e c y l i n d e r a n d
crankcase (NN) and main bearing caps
(AB, AC, AD, AG, and AH) according
t o instructions covering castings (par.
a n d r e l a t e d parts against limits spec-
i f i e d in repair and rebuild standards
t h e oil passages. The main bearing
caps are line bored with the crankcase
and replacement of any one part will
n e c e s s i t a t e replacement of the entire
cylinder and crankcase' assembly.
PLUGS BEHIND ENGINE NAME PLATE.
N o t e . Main bearing caps cannot be re-
placed individually.
c. Cleaning. When all pipe plugs, core hole
p l u g s (if applicable), and related parts have
been removed fromthe cylinder and crankcase,
(2) C y l i n d e r liner bore. Remove heavy
c l e a n cylinder and crankcase as instructed in
c a r b o n deposits from cylinder liners
with a scraper or blunt tool which will
not nick or scratch the surface. Clean
the liner bores with dry- cleaning sol-
INDER AND CRANKCASE AND MIS-
v e n t or mineral spirits paint thinner.
CELLANEOUS ITEMS
Check the liners for cracks, deep
s c r a t c h e s , scoring, or metal pickup,
N o t e . The key letters shown below in paren-
Check for ring ridge near top of liner
theses refer to figure 322 except where other-
b o r e at point of highest piston ring
wise indicated.
travel.
195
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