2008 Subaru Impreza Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2008 Subaru Impreza and How to Address Them Effectively

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
80% chance it's the
Oil System Components
0%
20% chance it's the
Engine Gaskets
The most common reasons a 2008 Subaru Impreza is leaking oil are oil system component failure and leaking engine gaskets.
  • Oil System Components: A worn or damaged oil pump or filter can lead to low oil pressure, resulting in inadequate lubrication and potential engine damage.
  • Engine Gaskets: A worn or damaged engine gasket can lead to oil or coolant leaks, resulting in engine overheating or loss of lubrication.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2008 Subaru Impreza is leaking oil?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What are the initial diagnostic steps to identify the source of the oil leak in a 2008 Subaru Impreza?

To effectively identify the source of an oil leak in your 2008 Subaru Impreza, begin with a thorough cleaning of the engine. This step is crucial as it removes any existing oil residue, allowing for a more accurate diagnosis. Once the engine is clean, run it and conduct a visual inspection of common leak areas, utilizing ample lighting to spot any oil droplets or trails. If the leak remains elusive, consider adding a UV dye to the engine oil; after driving the vehicle for a short distance, use a UV light to illuminate the dye, which will glow and help pinpoint the leak's origin. Focus your inspection on known trouble spots such as the crankshaft front main seal, valve cover gasket, and oil pump mechanism, as these are frequent culprits in Subaru models. Additionally, be vigilant for signs like blue smoke from the exhaust or consistently low oil levels, which can indicate significant leakage. It's also important to differentiate between engine oil and other fluids to avoid misdiagnosis. If the problem persists or if you're unsure about the diagnosis, consulting a Subaru specialist can provide the expertise needed to address the issue effectively.

What are the common causes of oil leaks in a 2008 Subaru Impreza?

When addressing oil leaks in a 2008 Subaru Impreza, it's essential to understand the common problems that can arise within the engine's components. One of the primary culprits is the valve cover gaskets, which can deteriorate over time, leading to leaks. Additionally, head gasket failures are notorious in Subaru vehicles, and while they can indicate serious issues, they are a frequent source of oil leakage. The front and rear crankshaft seals are also prone to wear, especially if the original black seals are still in place, as they are less durable than newer options. Camshaft seals, located behind the camshaft sprockets, can leak as they age, requiring some disassembly for access. The timing cover gasket is another area to inspect, as it can also fail and contribute to oil leaks. Lastly, don't overlook other potential leak sources such as piston access plugs, spark plug tube seals, and the PVC baffle plate, which can all wear out over time. Understanding these common issues can help you diagnose and address oil leaks effectively, but consulting a professional familiar with Subaru models is advisable for accurate repairs.

How urgent is it to address the oil leak in a 2008 Subaru Impreza?

Addressing an oil leak in a 2008 Subaru Impreza is not just a matter of convenience; it is a pressing concern that requires immediate attention. The small oil capacity of the engine means that even a minor leak can lead to rapid oil depletion, increasing the risk of severe engine damage. As oil levels drop, engine components experience heightened wear, which can result in costly repairs or even engine failure. Additionally, oil leaks can create hazardous conditions, such as smoke from the engine bay, which poses safety risks while driving. The oil can drip onto hot surfaces, leading to potential fires or visibility issues due to smoke. Common leak areas, including valve cover gaskets and oil pan gaskets, should be inspected promptly to prevent further complications. Delaying repairs not only exacerbates the problem but can also lead to more extensive damage, making it crucial to address any signs of an oil leak as soon as they are detected. Prioritizing this issue will help ensure the longevity and safety of your vehicle.

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