Tools You'll Need:
* Jack and Jack Stands: Securely lift the vehicle and support it on jack stands. Never work under a vehicle supported only by a jack.
* Wheel Chocks: Place chocks behind the rear wheels for added safety.
* Drain Pan: A large container to catch the engine oil.
* Wrench Set (metric): You'll need various sizes, including sockets, ratchets, and extensions.
* Oil Filter Wrench: To remove the oil filter.
* Pliers/Channel Locks: May be needed for stubborn bolts.
* Torque Wrench: Essential for tightening bolts to the proper specifications.
* Scraper/Putty Knife: To help remove old gasket material.
* New Oil Pan Gasket: Absolutely necessary.
* New Oil and Filter: Replace these while you're at it.
* Shop Rags or Paper Towels: For cleanup.
* Penetrating Oil (like PB Blaster): To help loosen stubborn bolts.
Procedure:
1. Safety First: Disconnect the negative battery terminal. This prevents accidental shorts.
2. Drain the Oil: Warm the engine slightly to thin the oil, then carefully drain the oil into your drain pan using the oil drain plug located at the bottom of the oil pan.
3. Remove the Oil Filter: Locate and remove the oil filter using the appropriate wrench.
4. Access the Oil Pan: This often involves removing some underbody plastic shielding or components depending on your specific Alero model. Consult your repair manual to determine what needs to be removed for proper access.
5. Remove Oil Pan Bolts: Carefully remove all the oil pan bolts. These are usually located around the perimeter of the oil pan. Apply penetrating oil if necessary and allow it time to work before attempting to loosen the bolts. Take note of the bolt locations and lengths; you'll need to put them back in the same places.
6. Lower the Oil Pan: Once all the bolts are removed, the oil pan should be free. It may be slightly stuck due to the gasket. Gently pry it loose, using a plastic pry tool to avoid scratching the pan or the engine block.
7. Clean the Surfaces: Carefully clean both the engine block mating surface and the oil pan mating surface, removing all traces of the old gasket. A scraper or putty knife can help with this. Use a clean rag or solvent to ensure everything is free from debris.
8. Install New Gasket: Carefully install the new oil pan gasket onto the engine block, ensuring it's properly seated.
9. Reinstall the Oil Pan: Carefully align the oil pan with the engine block and reinstall the bolts. Tighten them in a crisscross pattern, gradually tightening to the torque specifications listed in your repair manual. Do not overtighten.
10. Reinstall Components: Reinstall any components you removed for access to the oil pan.
11. Replace Oil Filter and Oil: Install the new oil filter and fill the engine with the correct amount and type of oil (check your owner's manual).
12. Check for Leaks: Start the engine and let it run for a few minutes. Carefully inspect the area around the oil pan for any leaks.
13. Recheck Oil Level: Check the oil level using the dipstick and add more oil if necessary.
Important Considerations:
* Repair Manual: This is crucial. Pictures and diagrams will help you immensely.
* Patience: This is not a quick job. Take your time and be methodical.
* Cleanliness: Keep the area clean to avoid debris getting into the engine.
* Torque Specifications: Following these is essential to prevent leaks and damage.
If you're not comfortable performing this repair yourself, it's best to take your Alero to a qualified mechanic. This is a job that, if done incorrectly, can lead to significant engine damage.
