Impala Oil Pan Gasket Replacement: Step-By-Step Guide

Replacing the oil pan gasket on a Chevy Impala is a complex task that requires mechanical expertise and a range of tools. The oil pan gasket is located between the oil pan and the engine block, and it plays a crucial role in sealing the surfaces and preventing oil leaks. While it is possible to replace the oil pan gasket without removing the engine, it is a challenging job that may require a hoist or engine support to lift the engine. The process involves multiple steps, including removing the engine mount, A/C compressor, starter motor, oil level sensor, and various brackets and bolts. The oil pan is then cleaned, and a new gasket is installed before reassembling the components. The cost of replacing the oil pan gasket on a Chevrolet Impala ranges from $569 to $687, with labour costs accounting for a significant portion of the total expense.

Removing the engine mount struts

To remove the engine mount struts as part of changing the oil pan gasket on a 2007 Impala, follow these steps:

First, disconnect the battery ground cable. Then, remove the engine mount struts from the engine. You will need to refer to the left and right engine mount strut replacement procedures for this. Next, install the J 28467-360. After this, raise and support the vehicle, and refer to the relevant information in the General Information section. Now, disconnect the A/C compressor mounting bolts, and reposition and secure the A/C compressor. Refer to the Compressor Replacement section in Heating, Ventilation, and Air Conditioning.

These steps are part of a larger procedure to change the oil pan gasket on a 2007 Impala.

Disconnecting the A/C compressor

To disconnect the A/C compressor on a 2007 Impala, you will need to first drain the engine oil and disconnect the battery ground cable. You will then need to remove the engine mount struts from the engine and raise the vehicle. Once the vehicle is raised, you can disconnect the A/C compressor mounting bolts and reposition and secure the A/C compressor.

It is important to note that you should never attempt to replace the oil pan gasket without first disconnecting the A/C compressor. This is because the A/C compressor, along with the starter and strut, must be removed in order to access the oil pan gasket.

When disconnecting the A/C compressor, it is recommended to have the system evacuated, oiled, and refilled by a competent A/C shop. This is because you must pull a vacuum on the system before recharging it to remove moisture. Additionally, you should check if there is oil in your replacement compressor and, if not, add the appropriate viscosity of PAG refrigerant oil. It is also highly recommended to replace the accumulator tank (receiver/dryer) and orifice tube when replacing the A/C compressor.

Finally, when disconnecting the A/C compressor, be sure to also remove the engine mount struts from the engine, as this will make it easier to access the compressor and its mounting bolts.

Draining the engine oil

To drain the engine oil of your 07 Impala, follow these steps:

Park your car on a level surface and engage the parking brake. This will ensure your car doesn't roll or shift while you're working, and that the engine oil is not tilted to one side, giving you an inaccurate reading of the oil level.

Locate the drain plug. This will be underneath your car, towards the front. You may need to crawl under the car to get a better view. Place a drain pan or wide container underneath the drain plug to catch the oil as it drains.

Using a socket wrench, loosen and remove the drain plug. Be careful as the oil will start to drain immediately. You may want to wear gloves and old clothes in case the oil splashes. Allow the oil to drain for at least 10 minutes, or until it has completely stopped flowing.

Once the oil has drained, replace the drain plug. Make sure it is tightened securely, but be careful not to overtighten it, as this can damage the oil pan.

Lower the car if it has been raised, and remove the drain pan. Now you can start to remove the oil filter. The oil filter in an 07 Impala is located near the front of the engine, towards the passenger side of the car. There are many different types of oil filter wrenches available, so choose one that fits your filter housing securely. Once the oil filter is removed, wipe the mounting base with a clean cloth to remove any dirt or debris.

Apply a thin coat of new oil to the rubber gasket of your new oil filter, and screw it into place by hand. Tighten it securely with the oil filter wrench.

Now you can add new oil to your engine. Remove the oil filler cap, located on the valve cover, and use a funnel to pour in the correct amount and type of oil for your vehicle.

Finally, replace the oil filler cap, start the engine, and check for any leaks. Allow the car to run for a few minutes, then check the oil level with the dipstick. Ensure that the oil level is correct, and add more if necessary.

It is important to dispose of your used engine oil responsibly. Used oil can be recycled at many automotive stores or local recycling centres. Do not pour it down the drain or into the ground, as it can contaminate water and harm the environment.

Removing the starter motor

To remove the starter motor as part of changing the oil pan gasket on a 2007 Impala, follow these steps:

First, disconnect the negative battery cable. Then, remove the engine mount struts from the engine. Next, you will need to raise and support the vehicle, and disconnect the A/C compressor mounting bolts. Reposition and secure the A/C compressor. Now, disconnect the oil level sensor wiring harness connection.

At this point, you are ready to remove the starter motor. Disconnect the positive battery cable terminal and engine harness terminal from the starter. Disconnect the starter motor electrical connector. Finally, remove the starter bolts and take out the starter.

To install the new starter, simply follow these steps in reverse order. Ensure that you torque the starter bolts to 32 lb-ft.

The whole process should take between 20 and 25 minutes.

Raising the engine

To replace the oil pan gasket on a 2007 Impala, you will need to raise the engine. This process can be complex and may require specialty equipment, so it is recommended to take your vehicle to a local repair shop if you do not have the necessary tools or expertise.

Step 1: Prepare the Vehicle

• Park the car on a level surface and engage the parking brake.
• Place wheel chocks around the driving wheels for added safety.
• Gather the necessary tools and equipment, including a floor jack, jack stands, and wooden blocks.

Step 2: Raise and Support the Vehicle

• Position the floor jack at the recommended lifting points and raise the vehicle.
• Place the jack stands at the appropriate points and slowly lower the vehicle onto them.
• Ensure the vehicle is securely supported and leave the jack in place for added safety.

Step 3: Access the Engine

• Remove any components that may obstruct access to the engine, such as the wheel well liner or engine cover.
• Detach any accessories or brackets that may interfere with engine movement, such as the A/C compressor or exhaust manifold support.

Step 4: Loosen and Support the Engine

• Loosen the engine mount bolts and brackets to allow for engine movement.
• Use a suitable engine support tool, such as a cherry picker or engine hoist, to securely support the engine.
• Ensure the engine is adequately supported and can be safely raised.

Step 5: Raise the Engine

• Use the engine support tool to carefully raise the engine.
• Raise the engine to a height that allows access to the oil pan.
• If necessary, adjust the position of the engine to ensure it is stable and secure.

It is important to work slowly and carefully during this process to avoid placing undue stress on the engine and its components. Once the engine is raised and supported, you can proceed with the oil pan gasket replacement, following the appropriate procedures for your vehicle.

Frequently asked questions