TM 5-3805-290-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 1. Engine Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. Perform Fuel Injector Nozzle Test (WP 1. If nozzles are damaged or defective,
6.
Engine Vibration -
0163 00).
replace them as necessary.
Continued.
2. If problem still exists, go to Test 6.
6. Inspect turbocharger, drain, bearings, If necessary, replace turbocharger, tighten
housing, and mounting bolts (WP 0165 bolts, adjust wastegate, or unblock
00).
restricted drain.
1. Remove valve mechanism cover (WP 1. If oil flow is restricted, unblock
7.
Excessive Valve Lash.
0024 00) and check lubrication in valve
passages to valve train and adjust valve
compartment. Ensure there is adequate
lash (WP 0155 00).
engine oil flow in valve compartment. 2. If problem still exists, go to Test 2.
Passages for engine oil must be clean.
2. Check engine crankcase breather for
1. If blocked, replace engine crankcase
blockage or restrictions (WP 0024 00).
breather.
2. If problem still exists, go to Test 3.
3. Remove valve mechanism cover (WP
1. If damaged, replace rocker arms, shaft
0024 00) and inspect valve train and
(WP 0156 00), or cylinder head (WP
cylinder head for obvious signs of
0146 00).
damage.
2. If problem still exists, the camshaft is
suspect, replace engine (WP 0145 00).
1. Check for excess oil (TM 5-3805-290- 1. Remove excess oil. Locate source of
8.
Excessive Engine Oil
10).
excess fluid. Repair leaks that are
Consumption.
causing problems. Recheck all fluid
levels.
2. If problem still exists, go to Test 2.
2. Check engine crankcase breather for
1. If blocked, replace engine crankcase
blockage or restrictions (WP 0024 00).
breather.
2. If problem still exists, go to Test 3.
3. Check restriction indicator on air
1. If restriction is indicated, clean or
replace air cleaner elements (WP 0032
cleaner (TM 5-3805-290-10).
00), remove any blockages or
restrictions, and replace damaged air
inlet and exhaust system lines or hoses
(WP 0033 00 and WP 0041 00).
2. If problem still exists, go to Test 4.
4. Inspect turbocharger, drain, wastegate, 1. If necessary, replace turbocharger,
adjust wastegate, tighten bolts, or
and mounting bolts (WP 0165 00).
unblock restricted drain.
2. If problem still exists, go to Test 5.
5. Ensure valve lash is correct (WP 0155
If compression on one or more cylinders is
low, replace engine (WP 0145 00).
00) and then perform Compression
Test (WP 0010 00).
