|Item Weight||5.8 ounces|
|Product Dimensions||4.6 x 3.8 x 1.3 inches|
|Item model number||41-803|
|Manufacturer Part Number||41-803|
|OEM Part Number||19308035|
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ACDelco 41-803 Professional Platinum Spark Plug (Pack of 1)
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- One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal. Reduces radio frequency and engine interference, regulates spark plug energy and seals against compression pressures for long life
- Double platinum point pad on center and ground electrode offer increased durability and consistent voltage demands to reduce wear on ignition system
- 100% Pure Copper Core results in cooler electrode temperature for enhanced durability and superior fouling resistance
This item is available because of the Add-on program
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From the Manufacturer
Good Maintenance Practices
Removing your Double Platinum spark plug
Grasp the spark plug boot and gently rotate it 90° counterclockwise. Pull the spark plug boot and cable away from the spark plug. If necessary, use spark plug boot removing tool. Do not grab or violently pull spark plug cables.
Use the correct deep socket size to loosen each spark plug one or two turns.
Note: To remove spark plugs from aluminum heads, allow the engine to cool. The heat of the engine, in combination with a spark plug that is still hot, may cause the spark plug threads to strip the cylinder head upon removal.
Inspecting the spark plug
Brush or air blast dirt away from the well areas before removing spark plugs. Caution: Use goggles to protect eyes from dirt when applying compressed air to spark plug wells.
Remove each spark plug and place each one in a tray by cylinder number. This will help identify and relate any unusual condition to the cylinder involved.
Installing new spark plugs
Apply dielectric grease into the boot area to reduce the chance of exterior tracking on the buttress tower of the spark plug. This grease also promotes a good heat transfer between the spark terminal screw and boot terminal.
Before installing new spark plugs, use a gap guide to make sure your new spark plugs have the correct gap.
Signs of Wear and Troubleshooting
Signs that your spark plugs need to be replaced:
Engine has trouble starting, hesitates, or cuts out.
Sluggish engine performance, loss of engine power, or decreased fuel economy.
Lack of acceleration or loss of speed when driving uphill.
Cracks in the upper or lower portion of the spark plug insulator.
Chipped or broken insulator tip.
Damaged spark plug boot.
Features and Benefits
- Double platinum point pad on center and ground electrode offer increased durability and consistent voltage demands to reduce wear on ignition system.
- 100% Pure Copper Core results in cooler electrode temperature for enhanced durability and superior fouling resistance.
The Professional category of high-quality aftermarket auto parts and products covers most GM vehicles as well as many other makes and models (varies by product line). Most of the current ACDelco line falls into this category, which is a high-quality alternative to GM OE products.
Frequently Asked Questions
Q: Are ACDelco spark plugs pre-gapped?
A: Yes. When ACDelco spark plugs are manufactured, they are pre-gapped to the correct gap specification.
Q: When I replace my spark plugs, should I also replace my spark plug wires?
A: Not always. Refer to your vehicle owner’s manual or contact the manufacturer for more information.
Q: How do spark plugs become fouled?
A: Certain engine conditions can cause oil, powder, and carbon to collect on the spark plug causing a misfire. See our list of “Signs and Causes of Spark Plug Wear.”