Lube Oil Analysis – Water + Glycol

Water (20ml) – Water content found in the system. This may be a freshwater source e.g. tap water, or saline water (with sodium), or coolant (with sodium and/or potassium and possibly glycol). In water based fluids, the water content needs to be within certain concentrations to maintain fire-resistance properties. If water is a contaminant in the system then it needs to be prevented from entering or removed after ingress (see Section on symptoms and corrective actions for details on how).

Glycol – this is an analysis linked to the water content. Glycol contamination suggests a coolant leak, incorrect sampling or use of a dirty top-up can.

Common Causes Potential Result Potential Advice

Water / Glycol

·        Low temperature.

·        Poor seals

·        IBC contamination / improper storage.

·        Coolant leak

·        Leaking solenoid valve on purifier

·        Condensation / humidity

·        Exposed/free breathing tanks/header tanks

·        Leak of gland (Sterntubes)

·        Poor lubrication

·        Rust

·        Engine failure

·        Pressure check cooling system.

·        Check lube & coolant levels for any change.

·        Check if coolant or lube top-up increasing.

·        Check for source of contamination ingress.

·        Inspect oil cooler – submit coolant sample.

·        Check head gasket and tighten bolts if needed.

·        Check engine temperature not too cold causing moisture from combustion to condense.

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