1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your ACDelco GM Original Equipment PF1218 Engine Oil Filter. Designed, engineered, and tested to rigorous standards, this filter helps ensure a clean supply of oil to engine components, contributing to the longevity and performance of your vehicle. ACDelco GM Original Equipment parts are true OE parts, validated by General Motors for GM vehicles.

Image 1.1: ACDelco GM Original Equipment PF1218 Engine Oil Filter.
2. Setup & Installation
Proper installation of the ACDelco PF1218 Engine Oil Filter is crucial for optimal engine performance and to prevent oil leaks. Always refer to your vehicle's service manual for specific instructions and safety precautions.
2.1. Required Tools and Materials
- New ACDelco GM Original Equipment PF1218 Engine Oil Filter
- Engine oil (correct type and quantity for your vehicle)
- Oil filter wrench
- Drain pan
- Socket wrench and appropriate socket for drain plug
- Funnel
- Clean rags or shop towels
- Safety glasses and gloves
2.2. Installation Steps
- Prepare the Vehicle: Ensure the engine is cool. Park the vehicle on a level surface and engage the parking brake. For easier access, you may need to lift the vehicle using a jack and secure it with jack stands.
- Drain Old Oil: Place the drain pan beneath the oil drain plug. Remove the drain plug and allow all the old engine oil to drain completely. Once drained, reinstall the drain plug and tighten it to the manufacturer's specifications.
- Remove Old Oil Filter: Position the drain pan under the old oil filter. Use an oil filter wrench to loosen and remove the old filter. Be prepared for residual oil to drain out.
- Prepare New Oil Filter: Apply a thin coat of new engine oil to the rubber gasket of the new ACDelco PF1218 filter. This helps ensure a proper seal and prevents the gasket from sticking during future removal.
- Install New Oil Filter: Carefully thread the new filter onto the engine by hand. Once the gasket makes contact with the engine block, tighten the filter an additional 3/4 to 1 full turn, or as specified by your vehicle manufacturer. Do not overtighten.
- Refill Engine Oil: Using a funnel, add the recommended type and quantity of new engine oil to your vehicle's engine.
- Check for Leaks: Start the engine and let it run for a few minutes. Turn off the engine, wait a few minutes for the oil to settle, and then check the oil level with the dipstick. Inspect around the new oil filter and drain plug for any signs of leaks.

Image 2.1: Bottom view of the ACDelco PF1218 oil filter, highlighting the gasket and threads for proper installation.

Image 2.2: Two ACDelco oil filters, illustrating different perspectives of the product.
2.3. Video Guide: Oil Filter Installation
Video 2.1: A visual guide demonstrating the installation process of the ACDelco GM Original Equipment PF1218 Engine Oil Filter on a small block Chevrolet engine. This video provides practical steps for replacing the oil filter during an oil change.
3. Operation
The ACDelco GM Original Equipment PF1218 Engine Oil Filter functions by removing abrasive particles and contaminants from your engine oil. As oil circulates through the engine, it picks up debris such as dirt, metal shavings, and combustion byproducts. The filter's media traps these harmful particles, preventing them from reaching sensitive engine components like bearings and hydraulic systems. This continuous filtration process helps maintain oil cleanliness, lubricity, and overall engine health.

Image 3.1: Exploded view of an oil filter, illustrating the internal components such as the filter media, anti-drainback valve, and sealing gasket, which work together to filter engine oil.
4. Maintenance
Regular maintenance, specifically timely oil and filter changes, is essential for the longevity of your engine. The ACDelco PF1218 oil filter is designed to perform effectively for the recommended service interval of your vehicle. Consult your vehicle's owner's manual for the exact oil change intervals, which typically range from 3,000 to 10,000 miles or every 3 to 12 months, depending on the oil type and driving conditions.
- Replacement Schedule: Always replace the engine oil filter whenever you change your engine oil.
- Quality Oil: Use high-quality engine oil that meets your vehicle manufacturer's specifications to maximize the effectiveness of the filter and protect your engine.
- Inspection: During oil changes, inspect the area around the oil filter for any signs of leaks or damage.
5. Troubleshooting
If you encounter issues after installing your ACDelco PF1218 Engine Oil Filter, consider the following common troubleshooting steps:
5.1. Oil Leaks After Installation
- Check Gasket: Ensure the old gasket was completely removed from the engine block before installing the new filter. A double gasket will cause a severe leak.
- Gasket Lubrication: Verify that the new filter's gasket was properly lubricated with fresh oil before installation.
- Tightness: Confirm the filter is tightened correctly. It should be hand-tight plus an additional 3/4 to 1 full turn. Overtightening or undertightening can cause leaks.
- Damage: Inspect the filter and engine mounting surface for any visible damage or debris that could prevent a proper seal.
5.2. Incorrect Fit
- Verify Model Number: Double-check that the PF1218 is the correct oil filter for your specific vehicle model and engine type. Refer to your vehicle's owner's manual or a reliable parts catalog.
- Thread Match: Ensure the filter threads align perfectly with the engine's oil filter housing. Do not force the filter on, as this can damage the threads.
6. Specifications
Key specifications for the ACDelco GM Original Equipment PF1218 Engine Oil Filter:
| Feature | Detail |
|---|---|
| Brand | ACDelco |
| Model Number | PF1218 |
| OEM Equivalent Part Number | 25160561 |
| Material | Paper, Stainless Steel |
| Item Dimensions (L x W x H) | 5.1 x 4.1 x 4.1 inches |
| Outside Diameter | 3.38 Inches |
| Thread Size | M16 x 1.5 |
| Item Weight | 13.28 ounces |
| Compatible Vehicle Type | Sports Utility Vehicle, Truck |
| Included Components | Engine Oil Filter |
| UPC / GTIN | 036666240672 |
7. Warranty & Support
7.1. Manufacturer Warranty
The ACDelco GM Original Equipment PF1218 Engine Oil Filter comes with a 24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. This warranty covers parts only. For complete details and terms, please refer to the official ACDelco website: ACDelco.com.
7.2. Customer Support
For further assistance, technical questions, or to locate a certified service center, please contact ACDelco customer support through their official website or consult a professional automotive technician. Always ensure that any service or installation is performed by qualified personnel if you are unsure about the process.



