ARMY TM 9-2815-256-24 AIR FORCE TO 38G1-96-2 MARINE CORPS TM 2815-24/5P Table 3-2.  Troubleshooting - Continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 1. Check for worn or damaged water pump bearing. a. Check for excessive water pump shaft play at cooling fan.  If not excessive, do step 2. b. Replace defective water pump.  Refer to paragraph 3-10. Step 2. Defective battery charging alternator. a. Remove and inspect battery charging alternator for damage.  Refer to paragraphs 3-11.1.  and 3- 11.3.  If not defective, do step 3. b. Repair or replace battery charging alternator.  Refer to paragraph 3-11. Step 3. Check for improperly adjusted valves. Check valve clearance and adjust as necessary.  Refer to paragraph 3-32.1.  If properly adjusted, do step 4. Step 4. Check for damaged rocker arm. a. Inspect rocker arms for damage.  Refer to paragraph 3-33.3.  If not damaged, do step 5. b. Repair or replace damaged rocker arm(s).  Refer to paragraph 3-33. Step 5. Check for loose flywheel. a. Tighten bolts to specified torque.  Refer to paragraph 3-34.3. b. Check tightness of flywheel attaching bolts.  If not loose, repair or replace engine. 15.  ENGINE MAKES A GAS LEAKING NOISE. Step 1. Check for loose or damaged exhaust manifold. a. Inspect for damage and loose attaching hardware.  If not damaged or loose, do step 2. b. Tighten or replace exhaust manifold.  Refer to paragraph 3-14.3. 3-12