TM 5-3805-262-34
2-4. ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. ENGINE MISFIRES.
Step 1.
Inspect cylinder heads for
cracks.
If cracks in cylinder heads are
not seen, start engine, and oper-
ate at 1000 rpm for five minutes.
With engine operating at idle
speed, check for engine coolant
coming out of exhaust manifold.
a. If cracks in cylinder heads
are seen, remove and replace
cylinder heads (page 3-45).
If engine coolant is coming
out of exhaust manifold, go to
step 2 below.
b. If cracks in cylinder heads not seen and engine coolant is not
coming out of exhaust manifold, go to step 3 below.
Step 2.
Remove cylinder heads (page 3-45).
Check for a cracked cylinder sleeve. Do this by cranking engine
until piston in cylinder being checked is at bottom of cylinder.
Then visually check cylinder sleeve.
Repeat for all six cylinders.
a. If a cylinder sleeve is cracked, notify general support mainte-
nance.
b. If cylinder sleeves are
okay, replace cylinder
head (page 3-45) and for-
ward to general support
maintenance for repair
(page 4-12).
Step 3. Check fuel injector nozzles
for looseness.
a. If fuel injector nozzles
are loose, tighten (page
3-113).
b. If fuel injector nozzles
are not loose, go to step
4 below.
2-17
