1. Gather Your Supplies:
* New oil filter: Make sure it's the correct one for your Blazer's engine (check your owner's manual). Having the old filter handy to compare is helpful.
* New oil: Consult your owner's manual for the correct type and quantity.
* Oil filter wrench: The size depends on your filter; a cap-type wrench is generally best. A strap wrench can also work, and is less likely to damage the filter.
* Wrench for the drain plug: This is usually a 15mm or 14mm socket. Double check your owner's manual to be certain.
* Drain pan: Large enough to hold at least 5 quarts of oil.
* Jack and jack stands (or ramps): Essential for safe access to the oil drain plug and filter. Never work under a vehicle supported only by a jack.
* Gloves: To keep your hands clean.
* Rags or paper towels: For cleaning up spills.
2. Prepare the Vehicle:
* Warm up the engine: Run the engine for 5-10 minutes to warm the oil, making it flow more easily. Don't let it get too hot, though.
* Secure the vehicle: Park on a level surface, engage the parking brake, and use jack stands to safely lift the vehicle. Never work under a vehicle supported only by a jack. Consult your owner's manual for proper jack points.
3. Drain the Old Oil:
* Locate the oil drain plug: It's usually on the bottom of the oil pan.
* Position the drain pan: Underneath the drain plug.
* Carefully loosen the drain plug: Use the appropriate wrench. Once it's loosened, unscrew it by hand. Be careful; the oil will be hot.
* Let the oil drain completely: This can take 15-20 minutes.
4. Remove the Old Oil Filter:
* Locate the oil filter: It's typically near the oil pan, often on the engine's side.
* Position the oil filter wrench: Securely onto the old filter.
* Unscrew the old filter: Turn it counterclockwise. It might be tight; be prepared for some resistance. Some oil will likely spill, so have rags ready.
5. Install the New Oil Filter:
* Lightly lubricate the rubber gasket: On the new filter with a bit of fresh oil.
* Screw on the new filter by hand: Tighten it according to the manufacturer's instructions (usually about ¾ to 1 full turn after the gasket contacts the engine). Don't overtighten.
6. Reinstall the Drain Plug:
* Replace the drain plug: Tighten it securely, but don't overtighten. Use a torque wrench if you have one; otherwise, tighten it firmly by hand.
7. Add New Oil:
* Lower the vehicle: Carefully remove the jack stands and lower the vehicle.
* Locate the oil filler cap: It's usually on top of the engine.
* Remove the oil filler cap.
* Add the correct amount of new oil: Refer to your owner's manual for the precise quantity.
* Check the oil level: Use the dipstick; add more oil if necessary.
8. Run the Engine and Check for Leaks:
* Start the engine: Let it run for a few minutes.
* Check for leaks: Inspect the area around the drain plug and oil filter for any oil leaks.
* Check the oil level again: After running the engine, let it sit for a few minutes before checking the oil level again. Top off if needed.
9. Dispose of Used Oil Properly:
* Take the used oil to a recycling center or auto parts store: They usually accept used oil for proper disposal. Never pour used oil down the drain or on the ground.
Important Notes:
* Always consult your owner's manual: This guide provides general instructions; your owner's manual will have specific information for your 1998 Chevy Blazer.
* Safety first: Never work under a vehicle supported only by a jack. Use jack stands for safety.
* Be careful with hot oil: Let the oil cool down before handling it.
* If you're unsure about any step, take your Blazer to a qualified mechanic.
This process is relatively simple, but if you're uncomfortable performing this task yourself, it's always best to have a qualified mechanic do it. Improper oil changes can damage your engine.
