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Page Title:
Engine runs rough, one or more cylinders not firing. |
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 49. TROUBLESHOOTING ENGINE ASSEMBLY - Continued
Corrective action
Probable causes
Malfunction
Make cylinder com -
2.
Low cylinder compression.
Engine cranks but
g.
g.
pression check (par.
will not start -
Continued.
priate action to cor-
rect condition as
follows:
(1) Check valve lash.
Remove cylinder
head cover (par.
130). Check valve
lash (par. 104)
and reset if
necessary.
(2) Worn piston rings.
Rebuild engine
through 286).
(3) Leaking valves.
Remove cylinder
head and install
new cylinder head
and valve assem -
bly (par. 94).
Remove thermostat
3.
Engine runs rough,
Engine operating at below
a.
a.
one or more cyl-
normal temperature.
open thermostat or
inders not firing.
replace when neces-
sary (par. 218). In-
stall thermostat
Check for dirt or ob-
b.
Dirty fuel, restricted fuel
b.
filters.
struction in fuel sys -
tern. Refer to the fuel
system troubleshooting
(par. 53). Replace
fuel injection pump
system is found clean
and fuel injection
pump adjustments in
TM 9-2910-223-35
do not correct mal-
functions.
c.
Leaking fuel injector nozzle
c.
Tighten or replace
leaking fuel injector
and holder tube.
nozzle and holder
tube (par. 100).
37
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