TM 5-3805-261-34ENGINE TROUBLESHOOTING AND MAINTENANCE PROCEDURES. (cont)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONh.CLICKING NOISE IN VALVE COMPARTMENT. (cont)Step 4.Check the valves.If the valves are damaged or defective--replace. Refer to paragraph 3-13.i.OIL IN THE COOLING SYSTEM.Step 1.Check the core of the transmission oil cooler (Figure 3-2).Figure 3-2.If the transmission oil cooler is damaged or defective--replace. Refer to paragraph 5-12.Step 2.Check the head gasket.If the head gasket is damaged or defective--replace. Refer to paragraph 3-9.j.MECHANICAL NOISE IN ENGINE.Step 1.Check the connecting rod and bearing surface on the crankshaft.If the connecting rod or bearing surface is damaged or defective--contact General Support.Step 2.Check the timing gears.If the timing gears are damaged or defective--contact General Support.3-8
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