1. Gather Your Supplies:
* New oil filter: Make sure it's the correct one for your 3.8L engine. Check your owner's manual or a parts store for the correct part number.
* New engine oil: Use the correct weight and type recommended in your owner's manual (usually 5W-30 or 10W-30). Check the amount needed – it's usually around 4-5 quarts.
* Oil filter wrench: A cap-type wrench or strap wrench will work best. The filter is usually fairly accessible.
* Wrench for the drain plug: Check your manual; it's likely a 13mm or 15mm.
* Drain pan: A large enough container to hold at least 5 quarts of oil.
* Jack and jack stands (highly recommended): Working under a car supported only by a jack is extremely dangerous.
* Gloves: To keep your hands clean.
* Rags or paper towels: For cleanup.
* Funnel: To make pouring the new oil easier.
2. Prepare the Vehicle:
* Warm up the engine: Run the engine for 5-10 minutes to warm the oil, making it flow more easily. Be cautious, as the oil will be hot.
* Secure the vehicle: Use a jack and jack stands to lift the front of the car and securely support it. Engage the parking brake.
* Locate the oil filter and drain plug: Consult your owner's manual or online diagrams if you're unsure of their location. The oil filter is typically on the passenger side of the engine. The drain plug is usually located on the bottom of the oil pan.
3. Drain the Old Oil:
* Position the drain pan: Place the drain pan under the oil drain plug.
* Remove the drain plug: Carefully loosen and remove the drain plug with the correct wrench. Let the oil drain completely. This may take 15-20 minutes. Be careful, the oil will be hot.
4. Remove the Old Oil Filter:
* Position the oil filter wrench: Place the oil filter wrench firmly on the old filter.
* Loosen and remove the filter: Turn the wrench counterclockwise to loosen and remove the old oil filter. It might be tight; be prepared for some resistance. Some oil will likely spill out, so have rags handy.
5. Install the New Oil Filter:
* Lightly lubricate the rubber gasket: Apply a thin layer of new oil to the rubber gasket on the new oil filter.
* Install the new filter: Screw the new oil filter on by hand, tightening it according to the manufacturer's instructions (usually about ¾ to 1 full turn after the gasket contacts the engine). Don't overtighten.
6. Replace the Drain Plug:
* Clean the drain plug: Wipe off any dirt or debris from the drain plug.
* Replace and tighten the drain plug: Screw the drain plug back into the oil pan and tighten it securely with the wrench. Don't overtighten.
7. Add New Oil:
* Add new oil: Using the funnel, carefully pour the correct amount of new oil into the engine. Refer to your owner's manual for the precise quantity. It's usually around 4-5 quarts.
8. Check the Oil Level:
* Start the engine: Run the engine for a few minutes.
* Turn off the engine: Let the engine sit for a few minutes to allow the oil to settle.
* Check the oil level: Use the dipstick to check the oil level and add more oil if necessary to reach the "full" mark.
9. Dispose of Used Oil Properly:
* Recycle the used oil: Most auto parts stores and some recycling centers accept used motor oil for recycling.
10. Double-Check Everything:
* Check under the car for any leaks.
* Inspect the new filter to ensure it's securely tightened.
* Check the oil level again.
Important Notes:
* Always consult your owner's manual: This guide provides general instructions; your owner's manual will have specific details and recommendations for your vehicle.
* Safety first: Never work under a car supported only by a jack. Always use jack stands. Wear gloves and eye protection.
* Hot oil: The oil will be hot after the engine has been running; be careful to avoid burns.
* If you're unsure, seek professional help: If you're uncomfortable performing this task yourself, take your car to a qualified mechanic.
By following these steps carefully, you should be able to successfully change the oil filter in your 1999 Pontiac Grand Prix GT. Remember safety is paramount.
