Chevrolet Impala Is Leaking Oil

Discover the Common Causes of Oil Leaks in Your Chevrolet Impala and How to Fix Them Effectively

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Reviewed by
Devin Cabugcal
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 Chevrolet Impala 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 Chevrolet Impala 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.

Oil pans don't wear out or break like other parts, they generally only need to be replaced because of external damage from an accident or an improperly tightened drain plug. The main symptom you will experience is an oil leak underneath the engine of your car. The oil that leaks from a damaged oil pan will range from dark brown to dark black. If the leak is large enough or occurs for long enough the oil level will be low enough to turn the oil pressure or low oil level warning light on.

An oil leak may be noted on the ground where the vehicle is parked. However, many vehicles have plastic trays underneath the engine that may catch leaking oil and conceal the leak. In such cases, a low oil level, a burning oil smell, or even smoke from oil burning in the engine bay may be noted.

»MORE: Signs of a bad oil pan gasket

A bad oil level sensor may cause a false reading of the engine oil level. The oil level warning light may illuminate even when the oil level (checked manually) is within an acceptable range. The warning light may also come on and off intermittently if the sensor is faulty. An error code may be sent to the PCM and a check engine light may come on the dashboard as well if the sensor is bad.

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.

How to Diagnose and Fix Oil Leaks in a Chevrolet Impala?

To effectively diagnose and fix oil leaks in your Chevrolet Impala, begin with a comprehensive visual inspection of the vehicle. Look for any oil spots on the ground beneath the car and examine the engine for visible oil residue. Pay particular attention to the oil filter and drain plug, ensuring they are secure and undamaged. Once you have identified potential leak areas, consider using dye in the oil to help trace the exact source of the leak. Common culprits include valve cover gaskets and the oil filter adapter seal, so inspect these components closely, even if they appear intact. Cleaning the area around the suspected leak will also aid in identifying the source, as it removes old oil that could obscure new leaks. Depending on the location of the leak, you may need to address specific issues, such as those arising from the oil pan or oil filter mount. By following this diagnostic approach, you can systematically identify and resolve oil leaks, ensuring your Impala runs smoothly.

How to Diagnose and Fix Oil Leaks in a Chevrolet Impala?

When diagnosing oil leaks in a Chevrolet Impala, it's essential to understand the common problems that can arise within the vehicle's oil system. One frequent issue is the deterioration of gaskets, particularly the valve cover gaskets, which can become brittle over time and lead to leaks. Additionally, the oil filter adapter seal is another common culprit; if this seal is compromised, it can result in significant oil loss. It's also important to consider the oil filter and drain plug, as damage or improper installation can create leaks. In some cases, leaks may stem from transmission fittings, which can be overlooked but are equally important to inspect. Furthermore, if modifications have been made to the Positive Crankcase Ventilation (PCV) system, it may cause increased pressure that exacerbates existing leaks. By being aware of these potential failure modes, DIYers can more effectively pinpoint the source of oil leaks and take the necessary steps to repair them, ensuring the longevity and performance of their Chevrolet Impala.

Why is it Urgent to Fix an Oil Leak in a Chevrolet Impala?

Fixing an oil leak in your Chevrolet Impala is not just a matter of routine maintenance; it is an urgent necessity that can prevent serious repercussions. An oil leak can lead to a significant loss of engine oil, which is vital for lubricating moving parts. Without adequate lubrication, the engine can suffer from increased friction and overheating, potentially resulting in catastrophic damage that could require costly repairs or even a complete engine replacement. Moreover, a well-lubricated engine is essential for optimal performance; neglecting an oil leak can lead to decreased efficiency and power, affecting your driving experience. Additionally, oil leaks pose environmental hazards, as they can contaminate soil and water sources, contributing to pollution. From a safety perspective, oil on the road can create slippery conditions, endangering not only the driver but also other road users. Therefore, addressing an oil leak promptly is crucial to safeguard your vehicle's health, your finances, and the environment, while also ensuring the safety of everyone on the road.

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