ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
TABLE 3-1. DIRECT SUPPORT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 5. Check for defective cylinder head gasket, refer to TM 9-2815-253-24.
a. If cylinder head gasket is not defective, do Step 6.
b. If defective, replace cylinder head gasket, refer to TM 9-2815-253-24.
Step 6. Check for low engine vacuum, refer to TM 9-2815-253-24.
If engine vacuum is too low, repair or replace engine, refer to TM 9-2815-253-24.
5. BLACK OR GREY SMOKE IN EXHAUST.
Step 1. Test for defective fuel injection nozzle(s), refer to TM 9-2815-253-24.
a. If fuel injection nozzle(s) is not defective, do Step 2.
b. If defective, repair or replace fuel injection nozzle(s), refer to TM 9-2815-253-24.
Step 2. Check for incorrect timing on fuel injection pump(s), refer to TM 9-2815-253-24.
If fuel injection pump(s) timing is incorrect, time fuel injection pump(s), refer to TM 9-2815-253-24.
6. BLUE OR WHITE EXHAUST SMOKE.
Step 1. Test for defective fuel injection nozzle(s), refer to TM 9-2815-253-24.
a. If fuel injection nozzle(s) is not defective, do Step 2.
b. If defective, repair or replace fuel injection nozzle(s), refer to TM 9-2815-253-24.
Step 2. Check for incorrect timing on fuel injection pump(s), refer to TM 9-2815-253-24.
If fuel injection pump(s) timing is incorrect, time fuel injection pump(s), refer to TM 9-2815-253-24.
7.
COOLANT IN CRANKCASE OR OIL IN COOLANT.
Step 1. Check for cracked cylinder head, refer to TM 9-2815-253-24.
a. If cylinder head is not cracked, do Step 2.
b. If cracked, replace cylinder head, refer to TM 9-2815-253-24.
Step 2. Check for defective cylinder head gasket, refer to TM 9-2815-253-24.
a. If defective, replace cylinder head gasket, refer to TM 9-2815-253-24.
b. If not defective and trouble persists, replace engine. Refer to TM 9-2815-253-24.
8. ABNORMAL ENGINE NOISE.
Step 1. Check for worn rocker arm shaft, refer to TM 9-2815-253-24.
a. If rocker arm shaft is not worn, do Step 2.
b. If worn, replace rocker arm shaft, refer to TM 9-2815-253-24.
Step 2. Check for bent push rods.
a. If push rods are not bent, do Step 3.
b. If bent, replace push rods, refer to TM 9-2815-253-24.
3-5
