Here's a general outline of the process. Remember that this is a general guide and specifics may vary slightly depending on the engine in your Transport (likely a 3.1L V6 or a 2.0L 4-cylinder). Consult a repair manual specific to your vehicle's year and engine for precise instructions and torque specifications.
Tools and Materials You'll Need:
* New oil pan gasket: Crucially, get the correct gasket for your engine.
* Jack and jack stands: Safety first! Never work under a vehicle supported only by a jack.
* Wheel chocks: To further secure the vehicle.
* Drain pan: For the old oil.
* Wrench set: Various sizes, including sockets and ratchets.
* Oil filter wrench: To remove the oil filter.
* Torque wrench: Essential for tightening bolts to the correct specification.
* Pliers: Possibly needed for stubborn bolts or clips.
* Scraper: To remove old gasket material.
* Clean rags or shop towels: Lots of them.
* New oil and filter: Don't forget to change these while you're at it!
* Gloves: To protect your hands.
* Repair manual: A specific repair manual for your 1995 Pontiac Transport is invaluable.
Procedure:
1. Prepare the Vehicle: Park on a level surface, engage the parking brake, and chock the wheels. Raise the vehicle using the jack and securely support it with jack stands.
2. Drain the Oil: Locate the oil drain plug on the oil pan and carefully remove it, letting the oil drain completely into your drain pan.
3. Remove the Oil Filter: Remove the oil filter using the oil filter wrench.
4. Remove the Oil Pan: This is the most challenging part. You'll need to remove various components depending on your engine's layout, likely including:
* Disconnect the oil pressure sending unit: This is usually a small electrical connection and a bolt holding it in place.
* Remove the oil pan bolts: These are typically around the perimeter of the oil pan. Work systematically, loosening them slightly before removing them completely. Some bolts might be difficult to access.
* Lower the oil pan: Carefully lower the oil pan. It might be stuck to the gasket. Gently pry it loose if necessary, but be cautious not to damage the pan.
5. Clean the Surfaces: Carefully remove all traces of the old gasket from both the oil pan and the engine block. Use a scraper and clean rags. Ensure both surfaces are completely clean and free of any debris.
6. Install the New Gasket: Carefully position the new oil pan gasket on the engine block, ensuring it's properly seated.
7. Install the Oil Pan: Carefully lower the oil pan onto the gasket. Make sure it's properly aligned.
8. Tighten the Oil Pan Bolts: Install and tighten the oil pan bolts in a crisscross pattern, tightening them gradually and evenly. Use your torque wrench to tighten them to the manufacturer's specified torque. This is crucial to prevent leaks.
9. Reconnect Components: Reinstall the oil pressure sending unit and any other components you removed earlier.
10. Install the Oil Filter: Install the new oil filter, tightening it according to the manufacturer's instructions.
11. Add New Oil: Add the correct amount of new oil as specified in your owner's manual.
12. Lower the Vehicle: Carefully lower the vehicle from the jack stands.
13. Check for Leaks: Start the engine and let it run for a few minutes. Carefully check for any leaks around the oil pan.
14. Check the Oil Level: After the engine has been running for a few minutes, turn it off and let it sit for a few more minutes to allow the oil to settle. Check the oil level using the dipstick.
Important Considerations:
* Repair Manual: A repair manual specific to your 1995 Pontiac Transport is strongly recommended. It will provide detailed instructions, diagrams, and torque specifications.
* Safety: Always prioritize safety. Never work under a vehicle supported only by a jack. Use jack stands and wheel chocks.
* Cleanliness: Maintain cleanliness throughout the process. Debris in the oil pan can damage the engine.
* Torque Specifications: Using the correct torque is crucial to prevent leaks and damage.
This is a complex procedure. If you are not comfortable with any step, seek professional help. A poorly executed oil pan gasket replacement can lead to significant engine damage.
