Usually, your mechanic will have to remove the oil pan as well as either your engine or your transmission to be able to replace the seal. One of the things that makes this repair difficult and costly is the hard to access location of this seal. Critically low oil levels can lead to permanent damage to your engine, and if the oil light ever comes on, it is recommended you stop driving immediately. It is also connected to the engine, which must be slick with oil to function properly. Due to the location, it is subject to high oil pressure. Rear main seal leaks are so dangerous because it is possible for the leak to occur at a very fast rate. Generally, maintaining the recommended oil change schedule as well as bringing your vehicle in for regular maintenance are the first steps in keeping the seals in your car in proper working order. These much simpler repairs can sometimes be misdiagnosed as a rear main seal leak. Make sure to check the cover gasket and valley pan for leaks. Running the car while it is stationary over concrete makes this easiest to spot. A simple test can be executed by idling your engine for about fifteen minutes and examining the ground underneath for any oil spillage. Unfortunately, this part is difficult to see and find on a car, and is not designed to be replaced easily. One of the most serious signs is if your oil light comes on shortly after an oil change. If you are seeing oil accumulating under the car, or noticing you need to top off your oil more frequently than usual despite not using the car more than is typical, you likely have a leak. If your car seems to be losing oil quickly but you do not see visible leakage when your car is parked, your rear main seal could be in the early stages of failure. Let’s examine how to spot a rear main seal malfunction, and what to do next. Excessive heat, old age, high mileage, infrequent use, and worn bearings can also be factors contributing to rear main seal failure. It is also crucial to check your oil and change it as needed, as low oil levels can cause issues with the rear main seal. Using the recommended oil for your car’s engine is a critical step to try to keep your rear main seal functioning the way it should. If this malfunction goes unnoticed, permanent engine damage can occur, which can make the vehicle beyond repair. The reason it is such a costly repair is that replacing it often involves dismantling the transmission and even part of, or all of, the engine. Its primary purpose is to keep oil sealed inside the back of the engine, which is where the crankshaft and the transmission meet. The rear main seal exists in the back of the engine, around the crankshaft. In older vehicles, the cost of this repair is often greater than the actual value of the car.
One of the worst things that can happen to a car is a failure of the rear main seal.
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