{"id":19124,"date":"2024-11-21T12:07:05","date_gmt":"2024-11-21T11:07:05","guid":{"rendered":"https:\/\/steelseal.de\/?p=19124"},"modified":"2025-02-17T14:23:57","modified_gmt":"2025-02-17T13:23:57","slug":"oil-in-cooling-water","status":"publish","type":"post","link":"https:\/\/steelseal.de\/en\/blog\/oel-im-kuehlwasser\/","title":{"rendered":"Oil in the coolant - causes, signs and what you can do"},"content":{"rendered":"
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Why does oil get into the cooling water?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Normalerweise haben Motor\u00f6l und K\u00fchlfl\u00fcssigkeit separate Aufgaben: Das \u00d6l schmiert den Motor und verringert Reibung, w\u00e4hrend das K\u00fchlmittel den Motor auf Betriebstemperatur h\u00e4lt und vor \u00dcberhitzung sch\u00fctzt. Wenn du Spuren von \u00d6l im K\u00fchlwasser deines Autos entdeckst, ist das oft ein ernstes Warnsignal f\u00fcr einen mechanischen Defekt. Das Vermischen von Motor\u00f6l und K\u00fchlwasser deutet meist auf einen Schaden im Bereich der Zylinderkopfdichtung<\/a> oder des Zylinderkopfs hin. Beide Teile sind wichtig daf\u00fcr, dass die verschiedenen Fl\u00fcssigkeiten im Motor \u2013 wie \u00d6l und K\u00fchlmittel \u2013 in getrennten Kan\u00e4len zirkulieren und nicht in Kontakt miteinander kommen.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Cracks in the cylinder head or cylinder head gasket<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The cylinder head and its gasket play a key role in keeping the oil and cooling water separate. The cooling system and the oil circuit are connected via fine channels throughout the engine block and cylinder head, which should ensure even temperature equalization and reliable lubrication. However, if a fine crack - often called a \"hairline crack\" - develops in the cylinder head or gasket, it can lead to a Transfer<\/strong> of oil and cooling water.<\/p>

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This overflow is so critical because it causes the two fluids to mix and subsequently lose their specific functions. A damaged cylinder head gasket causes the pressure in the engine ducts to drop and thus opens the separation between the coolant and lubricant circuits. A coolant crack in the cylinder head ensures that the fluids can enter the other circuits. This in turn can have fatal consequences and severely damage the engine in the long term. The lubricating performance of the oil decreases significantly, while the coolant cools less effectively. This can result in a total engine failure in a very short time, as the moving parts in the engine are not sufficiently lubricated and cooled.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Fast repair
with Steel Seal\u00ae<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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At Steel Seal\u00ae, we offer a quick and cost-effective solution for repairing defective cylinder-head gaskets and leaking cylinder heads without dismantling or disassembly. Thanks to a unique thermochemical formula, Steel Seal\u00ae precisely seals hairline cracks in the engine from the inside out and permanently restores the function of the cylinder-head gasket.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tTo the product<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Oil-water heat exchanger and its function in cooling<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Some vehicles are equipped with a special Oil-water heat exchanger<\/strong> which ensures controlled temperature equalization between the engine oil and coolant. This component helps to bring the engine oil to the optimum operating temperature more quickly and at the same time prevents it from overheating at high engine speeds. Oil flows through the heat exchanger and transfers excess heat to the coolant flowing past.<\/p>

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However, if this heat exchanger is defective, oil and cooling water can come into direct contact. A leak in the heat exchanger, often caused by material wear or corrosion, allows engine oil to leak into the cooling system or cooling water to enter the oil circuit. This leads to blockages in the cooling system and significantly reduces the cooling capacity, which affects the engine in the long term.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Hairline cracks in the engine block and their consequences<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Cracks can also occur in the engine block itself. These mainly occur when the vehicle is exposed to extreme temperatures or the cooling system has not been properly maintained. For example, if antifreeze has not been topped up correctly, cooling water can freeze and expand at sub-zero temperatures. This can lead to Cracks in the material of the engine block<\/strong> which has the same effect as a cylinder head crack - oil and coolant can mix.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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How do you recognize oil in the cooling water?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Es gibt bestimmte Anzeichen, die darauf hindeuten, dass sich \u00d6l im K\u00fchlwasser befindet. Wenn dir eines dieser Anzeichen auff\u00e4llt, solltest du deine Zylinderkopfdichtung bald \u00fcberpr\u00fcfen lassen<\/a>, um gr\u00f6\u00dferen Sch\u00e4den vorzubeugen:<\/p>