TM 5-3805-262-342-4. ENGINE TROUBLESHOOTING (CONT)ICE (SIMPLIFIED TEST EQIPMENT FOR INTERNAL COMBUSTION ENGINES).MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION13. DIFFERENCE BETWEEN TWO OR MORE CYLINDER COMPRESSION VALUES MORE THAN 25 PSIGWHEN PERFORMING CYLINDER COMPRESSION TEST (PAGE 3-12) (Cont).Step 2. (Cont).b. If carbon deposits are not present, use micrometer and checkcylinder head height to determine if too much material was re-moved from resurfaced cylinder head. Cylinder head height mustbe 4.080 inches or more. If cylinder head height is less than4.080 inches replace cylinder head (page 3-45).14. COMPRESSION UNBALANCE IS HIGHER THAN REFERENCE STANDARD WHEN CHECKED USING STE/NOTEIf FAIL or E013 was displayed during compression unbalance test usingSTE/ICE, go to step 1 below.Step 1.Perform engine compression check (page 3-12).a. If compression check readings are low, go to step 2 below.b. If compression check readings are high, go to step 4 below.Step 2.Put a small amount of oil in cylinder and repeat engine compressioncheck (page 3-12).a. If compression check readings are now normal, replace pistonrings (page 4-42).b. If compression check readings are still low, go to step 3 below.Step 3.Check valve timing (page 3-8).a. If valve timing is not okay as indicated by dial indicator handnot indicating 0.053 inch, go to Malfunction 11, page 2-41.b. If valve timing is okay as indicated by dial indicator hand in-dicating 0.053 inch, compression leakage is either past valvesor a damaged cylinder head gasket. Remove cylinder head (page3-45) associated with bad cylinder and check gasket.head gasket is okay, remove and replace valves (pageIf cylinder3-74).2-45
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