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Table 5 : Engine Problems Analyzed through Oil Analysis
Metal Traces Limit Engine Problem What to Check
Silicon 10 - 30 ppm Dirt Ingression Air intake system
Oil filter plugging
Oil filler cap and breather
Valve cover
Iron (Fe) 100 - 200 ppm Wear of cylinder liner Excessive oil consumption
Valve and fear train Abnormal engine noise
Oil pump Performance problem
Rust in the system Oil pressure
Stuck or broken piston •
Chromium (Cr) 10 - 30 ppm Piston ring wear Excessive oil blow-by
Oil consumption / degradation
Copper (Cu) 10 - 50 ppm Bearing / bushing wear Coolant in engine oil
Radiator corrosion Abnormal noise on operating
at stall speed
Lead (Pb) 40 - 100 ppm Bearing corrosion Extended oil change intervals
Aluminum (Al) 10 - 30 ppm Piston and piston thrust Blow-by gases
Bearing wear Oil consumption
Power loss
Abnormal engine noise