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Page Title:
Table 1. Engine Troubleshooting Procedures - continued |
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 TM 9-2320-361-24-1
0008 00
MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd)
Table 1. Engine Troubleshooting Procedures (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. If coolant is present on oil
12. EXHAUST COLOR
dipstick, check intake manifold
WHITE DURING
and gaskets for defects. See
NORMAL
WP 0008 00, table 1,
OPERATION AND
malfunction 1, step 11.
IDLE
(Contd)
3. If coolant is present on dipstick,
check cylinder heads and gaskets
for defects. (WP 0027 00).
3. Test run vehicle after replacing
Replace engine (WP 0046 00).
cylinder heads and gaskets. If
exhaust color remains white,
internal engine block cooling
jacket failure is indicated.
13. ENGINE OIL
CAUTION
PRESSURE LOW OR
ZERO AT NORMAL
Do not operate engine except during
OPERATING
testing when condition of no oil
TEMPERATURE
pressure is evident. Continued
operation may damage engine
internally.
1. Check oil pressure regulator for
If oil pressure regulator is defective,
leaks or defective operation.
replace (WP 0037 00).
Remove oil pressure regulator and
inspect for defects (WP 0037 00).
NOTE
When oil pump operation or
condition becomes defective, usually
there is a lack of oil supply or
restriction from oil sludge.
2. Remove oil pan and oil pump and
If oil pump is defective, repair or
inspect for defects (WP 0035 00
replace (WP 0036 00). Do not install
and WP 0036 00).
oil pick up or oil pan when
reinstalling oil pump.
3. Check oil pick up for restrictions.
If oil pick up is restricted, clean or
replace (WP 0036 00). Do not install
oil pan when reinstalling oil pickup.
NOTE
Lack of oil supply due to oil pick up
restrictions reducing or cutting off oil
supply may cause damage to main
and rod bearings, crankshaft, and
rods.
Replace engine if crankshaft is
4. Inspect crankshaft for nicks,
damaged (WP 0046 00).
burns, scuffs, or discoloration due
to overheating.
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