{"id":89415,"date":"2023-06-15T11:38:43","date_gmt":"2023-06-15T11:38:43","guid":{"rendered":"https:\/\/www.dubizzle.com\/blog\/cars\/?p=89415"},"modified":"2023-06-15T11:39:04","modified_gmt":"2023-06-15T11:39:04","slug":"oil-coming-out-exhaust-causes","status":"publish","type":"post","link":"https:\/\/www.dubizzle.com\/blog\/cars\/oil-coming-out-exhaust-causes\/","title":{"rendered":"Oil Coming Out of the Exhaust: Causes & Fixes"},"content":{"rendered":"\n

The sight of oil spewing from a car’s exhaust is not only unusual but also deeply concerning. This alarming occurrence hints at underlying problems within the vehicle’s engine and demands immediate attention. That said, we have penned why one would notice oil coming out of the exhaust system. We have also provided solutions to cater to these problems for prompt repair. <\/p>\n\n\n\n

COMMON CAUSES OF OIL COMING OUT OF THE EXHAUST <\/strong><\/h2>\n\n\n\n

A car exhaust system<\/a> is crucial for the proper functioning of the vehicle since it exhausts harmful fumes from the cabin and engine. However, over time, it may be subjected to different issues.<\/p>\n\n\n\n

 One might notice water coming out from the exhaust<\/a> or smoke in unusual colours. Similarly, oil coming out of the exhaust is another underlying issue in the vehicle. Let\u2019s go through the potential causes of oil coming out of the exhaust and how to prevent them. <\/p>\n\n\n\n

FAILED VALVE SEALS <\/strong><\/h3>\n\n\n\n

The function of an engine valve<\/a> involves valve seals which prevent oil to enter the combustion chamber. If they fail, oil can leak into the combustion chamber and be burned, which will cause engine oil to come out of the exhaust.<\/p>\n\n\n\n

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Failed valve seals cause the oil to expel from the car exhaust <\/figcaption><\/figure>\n\n\n\n

FAULTY PCV SYSTEM <\/strong><\/h3>\n\n\n\n

The Positive Crankcase Ventilation (PCV) system is responsible for redirecting blow-by gases from the crankcase back into the intake manifold to be burned. If the PCV valve or related components are faulty, excessive pressure can build up in the crankcase.<\/p>\n\n\n\n

 This causes the oil to be forced into the combustion chamber and subsequently out of the exhaust. Apart from these symptoms, one may also notice oil-covered spark plugs<\/a>. <\/p>\n\n\n\n

WORN PISTON AND PISTON RINGS<\/strong><\/h3>\n\n\n\n

Piston rings are a vital part of the combustion chamber<\/a> which prevents the oil from entering it. However, if one or more piston rings become broken or damaged, the oil leaks into the combustion chamber and expels through the exhaust. Also, oil burns with the air-fuel mixture and creates a blue smoke. It impacts the efficiency of the engine and is also a major fire hazard. <\/p>\n\n\n\n

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When piston rings become damaged, the oil leaks out of the exhaust and burns with the air-fuel mixture <\/figcaption><\/figure>\n\n\n\n

CRACKED CYLINDER BLOCK OR HEAD <\/strong><\/h3>\n\n\n\n

Located on the top of the car engine, the engine cylinder heads are a crucial part of the engine block. Although they are responsible for mixing gas and air, cracked engine cylinder heads<\/a> quickly deteriorate a car\u2019s working. Common symptoms of such damage include visible smoke from the engine, misfiring or oil coming out of the exhaust. <\/p>\n\n\n\n

BLOWN HEAD GASKET <\/strong><\/h3>\n\n\n\n

An engine head gasket is responsible for keeping the different car fluids separate from one another. However, a blown head gasket causes oil and coolant to mix<\/a>. When this happens, the oil is burnt and expelled through the exhaust system. One may also notice other symptoms like white smoke, overheating, or coolant loss.<\/p>\n\n\n\n

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Due to a blown head gasket, oil spills from the car’s exhaust system <\/figcaption><\/figure>\n\n\n\n

ISSUES IN TURBOCHARGER<\/strong><\/h3>\n\n\n\n

The main purpose of a turbocharger<\/a> is to boost the engine\u2019s output power. However, in case of any rupture in this component, a vehicle\u2019s functioning is compromised. <\/p>\n\n\n\n

A failing turbocharger leads to the engine oil coming out of the exhaust along with sluggish acceleration<\/a>, a check engine light or excessive consumption of fuel. It mainly malfunctions due to damaged bearings, worn seals or excessive oil pressure. <\/p>\n\n\n\n

FIXES FOR OIL COMING OUT OF THE EXHAUST<\/strong><\/h2>\n\n\n\n

After going through the potential causes of oil coming out of the exhaust, here are some practical ways to fix this issue. It is necessary to address such an issue at the earliest to avoid any further damage and seek professional assistance. One may also opt for dubizzle inspection services for cars<\/a> to inspect such problems. These fixes are as follows. <\/p>\n\n\n\n

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Such issue must be inspected promptly to avoid further damage <\/figcaption><\/figure>\n\n\n\n

OPT FOR A LEAK-DOWN TEST<\/strong><\/h3>\n\n\n\n

Opting for a leak-down test helps to diagnose the underlying problem. One may make this test using professional equipment in the following manner:<\/p>\n\n\n\n