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
C AU T I O N
9.
Low Engine Oil Pressure.
DO NOT operate engine with low oil pressure. Engine damage will result. If
measured oil pressure is low, discontinue engine operation until problem is
corrected.
1. Connect MSD and check for active
1. Troubleshoot any active codes before
diagnostic codes using ET software
continuing with this procedure. Refer
to Troubleshooting With a Diagnostic
Code (WP 0009 00).
2. If problem still exists, go to Test 2.
2. Inspect engine oil level (TM 5-3805-
1. If necessary, add oil (TM 5-3805-290-
10).
290-10).
2. If problem still exists, go to Test 3.
3. Perform Engine Oil Pressure Test (WP 1. Change engine oil and filters (WP 0025
00).
2. If problem still exists, go to Test 4.
4. Inspect piston cooling jets for damage
1. Replace any piston cooling jet that
appears cracked or broken
(WP 0159 00).
2. If problem still exists, go to Test 5.
5. Inspect engine oil pump for excessive
1. Remove any material from oil suction
wear and check oil suction tube for
tube. If damaged, replace oil pump.
build-up that restricts oil flow, cracks,
2. If problem still exists, replace engine
or a damaged O-ring seal (WP 0160
(WP 0145 00).
00).
1. Ensure correct engine oil and interval
1. Use correct engine oil and change
10. Engine Has Early Wear.
are used when changing engine oil.
engine oil at correct interval (WP 0020
00).
2. If problem still exists, go to Test 2.
2. Change engine oil and filters (WP 0025 If problem still exists, go to Test 3.
00).
3. If oil filter bypass valve is open, oil will 1. If spring is broken, replace spring (WP
not be filtered. Check oil filter bypass
0160 00).
valve for a weak or broken spring (WP 2. If problem still exists, go to Test 4.
0027 00).
4. Inspect air inlet system for leaks.
1. Repair any leaks and replace air cleaner
Inspect all gaskets and connections.
elements if necessary (WP 0032 00).
2. If problem still exists, go to Test 5.
5. Replace fuel filters (WP 0036 00).
If problem still exists, go to Test 6.
6. Check for contaminated fuel.
1. If fuel is contaminated, drain tank and
lines and replace fuel filters (WP 0036
00).
2. If problem still exists, go to Test 7.
