However, this is only the first step; the underlying cause, such as a blown head gasket, must be diagnosed and repaired before refilling the system, otherwise the new oil will quickly become contaminated again. Another vector is the internal transmission cooler located inside the radiator; if the unit develops a leak, pressurized coolant can migrate into the transmission fluid or, in certain configurations, into the engine oil cooler lines.
Engine Block Crack Leading to Water Intrusion
Immediate Actions to Prevent Catastrophe Driving with water-contaminated oil is prohibited, as the lack of lubrication leads to rapid bearing and shaft wear. A secondary, though less frequent, source is a compromised engine block or cylinder head due to cracking from extreme thermal stress or impact.
Inspection and Diagnostic Procedures To confirm the presence of water, a mechanic may perform a simple emulsion test by mixing a sample of the old oil with pure gasoline in a sealed jar and shaking it; if the mixture clears, water was present. Furthermore, the engine may exhibit a sudden drop in oil pressure, excessive smoke from the exhaust (often white and sweet-smelling), and a noticeable loss of power due to the destruction of the lubrication film.
Engine Block Crack Leading to Water Intrusion
Mechanics will typically begin by performing an oil and filter change to remove the majority of the contaminated fluid. Identifying the Tell-Tale Signs Recognizing the symptoms early can distinguish between a manageable repair and a complete engine rebuild.
More About Water in engine oil
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