TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
Table 1. Engine Troubleshooting - Continued.
TEST OR INSPECTION
1. Check radiator fins for dirt, debris, and/ 1. Remove any dirt and/or debris and
21. Coolant Temperature is
straighten any bent fins or replace
radiator (WP 0167 00).
2. If problem still exists, go to Test 2.
WARN I N G
DO NOT service cooling system unless engine has been allowed to
cool down. This is a pressurized cooling system and escaping steam
or hot coolant may result in serious burns.
DO NOT remove cooling system radiator cap when engine is hot.
Allow engine to cool down. Loosen cap to first stop and let any pres-
sure out of cooling system, then remove cap. Failure to follow this
warning may result in serious burns.
Wear effective eye, hand, and skin protection when handling cool-
ants. Failure to do so may result in injury to personnel.
2. Inspect coolant level (TM 5-3805-290- 1. If necessary, add coolant.
2. If problem still exists, go to Test 3.
3. Talk to operator and ensure there is not 1. Reduce load and verify that condition
excessive load on system (TM 5-3805-
does not reoccur.
2. If problem still exists, go to Test 4.
4. Check cooling system for leaks by
1. Repair any leaks immediately.
performing System Pressure Test.
2. If problem still exists, replace
Refer to Testing Radiator and Cooling
thermostat (WP 0043 00).
System for Leaks (Pressure Test) (WP
3. If problem still exists, go to Test 5.
5. With engine off and completely cool, 1. If bubbles are present in coolant,
remove pressure cap for coolant
system. Start engine (TM 5-3805-290-
cooling system. Replace cylinder head
10) and inspect coolant for presence of
gasket (WP 0146 00).
2. If no bubbles are present, reinstall
pressure cap and go to Test 6.
6. Visually inspect cooling system for
1. If damaged, replace hoses (WP 0044
00). Clean and flush radiator (WP 0042
collapsed hoses and/or other
2. If problem still exists, go to Test 7.