Observable Diagnostics and Tests
– – –1/1
4 Pistons, Rings, and
Cylinder Liners Test
At this point, the most likely cause of the excessive oil consumption is one of the
following failures in the pistons, rings, and/or cylinder liners or in the valve guides.
Check the most likely item as needed:
• Oil control rings worn or broken
• Scored cylinder liners or pistons
• Piston ring groves excessively worn
• Piston rings stuck in ring groves
• Insufficient piston ring tension
• Piston ring gaps not staggered
• Cylinder liners glazed (insufficient load during break-in)
• Worn valve guides or stems
Problem found with
pistons, rings, and/or
liners or valve guides:
Repair problem as
necessary.
04
150
4
CTM100 (06APR04)
04-150-4
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=352
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