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Page Title:
Engine exhaust smokes-continued |
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 49. TROUBLESHOOTING ENGINE ASSEMBLY - Continued
Malfunction
Probable causes
Corrective action
7.
Engine exhaust
--.
d
Low compression,
d.
Check cylinder com-
pression (par. 102).
smokes - Continued.
Replace damaged parts
as necessary (par. 49,
2e above).
(2) Blue smoke in-
--.
a
--.
a
One or more cylinders
Refer to paragraph 49,
not firing.
3 above for corrective
dicating admit-
tance of engine
action.
oil into com-
bustion chamber,
--.
b
Worn or stuck piston
--.
b
Remove cylinder heads
rings or worn cylinder
(par. 94). Remove oil
pan (par. 95). Remove
liners.
pistons (par. 138) and
replace pistons, rings,
and/or cylinder liners
(par. 162). Install oil
inder heads (par. 94).
--.
c
Worn valve guides.
Remove cylinder heads
--.
c
(par. 94). Disassemble
cylinder head (par. 198).
Replace valve guides
(par. 200). Assemble
cylinder head (par. 201)
and install cylinder head
inder head when neces-
sary.
(3) Black smoke in-
Improper fuel injection
Adjust fuel injection
a.
--.
a
dicating rich
pump adjustment.
pump. Refer to
fuel mixture.
TM 9-2910-223-35 for
procedures.
Note. Black
b.
Check and adjust fuel
Fuel injection pump not
b.
smoke during
injection pump timing
properly timed.
acceleration is
normal.
Restriction in air supply
c.
c.
Check air cleaners for
system or failed turbo-
dirt, check cleaner hoses
supercharger.
for restrictions. Refer
to TM 9-2320-235-20.
Check turbosupercharger
as directed in TM 9-2990-
201-35 and replace when
necessary (par. 62).
Overloaded or lugging
d.
Reduce load by using
--.
d
lower gear range.
engine.
41
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