TM 5-3805-280-24-2
Cylinder Block, Liners, Pistons and Rods
PRELIMINARY LINER, PISTON AND ROD CHECKS
10
19
Stuck Rings:
Scuffed or Scored Pistons:
Improper oil classification.
Insufficient lubrication.
Improper periodic service.
Insufficient cooling.
Poor operating conditions.
Improper piston-to-liner clearance.
Coolant leakage in crankcase.
Coolant leakage in crankcase.
Excessive cylinder liner taper.
Misaligned or bent connecting rod.
Improperly installed piston.
Cylinder Liner Wear and Distortion:
Low oil level.
Improper operation.
Incorrectly installed compression rings.
Incorrect connecting rod bearing clearance.
Insufficient lubrication.
Carbon build-up in ring groove.
Uneven cooling around liner.
Improper break-in.
Improper piston-to-liner clearance.
Worn piston.
Liner bore damage.
Contaminated oil.
Distorted cylinder liner.
Warped Cylinder Block:
Worn or Broken Compression Rings:
Insufficient cooling.
Insufficient lubrication.
Broken Connecting Rod:
Insufficient cooling.
Improper ring installation.
Inadequate piston-to-liner clearance.
Improper combustion.
Worn connecting rod bearing.
Improper timing.
Distorted cylinder liner.
Abrasives in combustion chamber.
Piston pin failure.
Clogged Oil Control Ring:
Piston Pin and Snap Ring Failure:
Improper oil.
Misaligned connecting rod.
Excessive blow-by.
Excessive crankshaft end play.
Contaminated oil.
Incorrect snap rings.
Improper periodic service.
Low operating temperature.
Mottled, Grayish or Pitted Compression Rings:
Dull Satin Finish and Fine Vertical Scratches on
Internal coolant leaks.
Rings:
Dirt and abrasive in air intake system.
RG,10,DT7418 1912NOV971/1
13-132
