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ISM, ISMe, and QSM11 – 007-083   Lubricating Oil and Filter Analysis

Table of Contents

Inspect

Inspect

 TOC

A used oil analysis can help diagnose internal damage and determine the cause, such as:

  • intake air filter malfunction
  • coolant leaks
  • oil diluted with fuel
  • metal particles causing wear.
  
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NOTE: Do not disassemble an engine for repair based only on the results of an oil analysis. Inspect the oil filters also. If the oil filter shows evidence of internal damage, find the source of the problem and repair the damage. See the appropriate section(s) of this manual based on the following oil filter inspection.

For additional oil analysis information, refer to Cummins® Engine Oil and Oil Analysis Recommendations, Bulletin 3810340.

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Use tube cutter, Part Number 3376579, to open the combination oil filter.

Inspect the filter element for evidence of moisture or metal particles.

Metal
Possible Source
Copper
Bearings and Bushings
Chromium
Piston Rings
Iron
Cylinder Liners, Overhead Components
Lead
Bearing Overlay Material
Aluminum
Piston Wear or Scuffing

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Last Modified:  23-Jan-2009
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Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.