ARMY TM 9-2815-260-24 AIR FORCE TO 38G1-126-2 MARINE CORPS TM 09244A/09245A-24 3-8 TABLE 3-2.  UNIT TROUBLESHOOTING (Sheet 5 of 11) Not OK   OK   ENGINE OVERHEATING Engine overheating. Check coolant level (refer to TM 9-6115-672-14 or other applicable TM). Locate source of coolant leak and repair or replace (refer to TM 9-6115-672-14). Add coolant (refer to TM 9-6115-672-14 or other applicable TM). Check for defective thermostat (refer to paragraph 3.8.2). Perform end item troubleshooting procedures (refer to TM 9-6115-672-14 or other applicable TM). Replace thermostat (refer to paragraph 3.8.2). Check for defective water pump (refer to paragraph 3.8.3). Replace defective water pump (refer to paragraph 3.8.3). Notify next higher level of maintenance. Not OK   OK   Not OK   OK