TM-9-2320-361-24-1
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS
TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2
AUGUST 2006
TM-9-2320-361-24-1 - Page 135 of 1176
TM 9-2320-361-24-1
0008 00
0008 00-7
MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
11. EXHAUST COLOR
BLUE DURING
NORMAL
OPERATION
(Contd)
3. If one or more cylinders have
an 8–10% or greater loss in
both wet and dry tests then
compression loss is on top of
engine. Remove head(s) and
inspect valves, valve seats
and guides, and cylinder
head gasket(s).
4. If steps 2 and/or 3 do not
sufficiently restore engine to
normal operation, remove
rocker arm covers
(WP 0030 00), inspect for
camshaft, tappets, and
pushrod defects.
5. If compression test readings
are within limits for all
cylinders and engine
develops normal power but
still shows blue exhaust.
Test 3. Perform engine oil
consumption test.
1. Operate vehicle and closely
check engine oil level unit
until oil level reaches one
quart low. Stop vehicle
operation.
2. Record vehicle mileage.
Calculate engine oil
consumption by subtracting
mileage when engine oil level
was topped off from current
mileage recorded when
engine oil level is one quart
low. The difference is the
mileage using one quart of
oil.
3. Repeat steps 1 and 2 of
engine oil consumption test.
If oil consumption is not
acceptable.
Repair or replace defective
components (WP 0027 00 and
TM 9-2815-210-34-2-2).
Repair or replace defective parts
(WP 0031 00, and WP 0034 00 or
TM 9-2815-210-34-2-2).
Remove cylinder head (WP 0027 00)
and replace valve seals and guides
(WP 0443 00).
1. If engine oil consumption remains
less than 60 mi. (96 km) for one
quart of oil, check all seals.
2. If there are no leaks, proceed to
step 3 of test 3.
1. If engine oil consumption remains
less than 60 mi (96 km) for one
quart of oil, check all seals.
2. If engine oil consumption is
greater than or equal to 60 mi
(96 km) for one quart of oil, oil
consumption is acceptable. No
further action required.
1. If engine oil consumption remains
less than 60 mi (96 km) for one
quart of oil, check all seals.
2. If engine oil consumption is
greater than or equal to 60 mi
(96 km) for one quart of oil, oil
consumption is acceptable. No
Table 1. Engine Troubleshooting Procedures (Contd).
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