What size socket is a Chevy Spark plug?
For most Chevy Spark models, the spark plug hex is 14 mm, so you should use a 14 mm spark plug socket. This size matches the standard plugs used on the Spark's common 1.0L/1.2L engines. Always verify for your exact model year and market, since variations can occur.
Typical spark plug socket size for the Chevy Spark
In the common North American Spark lineup (1.0L and 1.2L gasoline engines), the spark plug hex is 14 mm. Using the correct socket helps avoid damaging the plug or head.
What to know before you shop or begin a plug change:
- The hex size on most Chevy Spark plugs is 14 mm (0.551 inches).
- Use a 14 mm spark plug socket, preferably magnetic with a rubber insert to hold the plug securely.
- A standard 3/8-inch drive ratchet with a short to medium extension (about 6 inches) is typical; you may need a swivel/joint for tight engine bays.
- Check your vehicle’s manual or the spark plug’s packaging to confirm the exact size for your year and market.
- Some rare market-year variants may use a different hex size (such as 12 mm or 5/8 inch); verify before buying tools.
In short, a 14 mm spark plug socket covers the vast majority of Chevy Spark plugs; verify against your car’s specifications if you’re working on a non-standard year or market.
How to verify the correct size on your Chevy Spark
If you’re not certain which socket fits, follow these steps to confirm the correct plug size for your exact vehicle:
- Consult the owner's manual or a factory service/parts catalog for the plug size specified for your model year and engine.
- Carefully remove the spark plug boot to expose the plug hex and inspect or measure across the flats with a ruler or caliper.
- Trial-fit sockets starting with 14 mm if you see the hex is around that size; ensure the socket fits snugly with no wobble before loosening the plug.
- When in doubt, ask a dealer parts counter or check online parts databases for your VIN to confirm the exact plug size for your Spark.
Using the correct size helps prevent rounded plugs, stripped heads, or tool damage during installation and removal.
Summary
For most Chevy Spark models, you’ll want a 14 mm spark plug socket. Always verify the exact size for your year and market, as rare variants can differ. With the right socket, torque the plug to the manufacturer’s specification and reassemble the ignition components carefully. Regular maintenance keeps the Spark running smoothly.
What can I use instead of 14mm?
Metric / Standard Wrench Conversion Chart
| Bolt Diameter | Metric | Standard |
|---|---|---|
| 3/8" | 14mm | 9/16" |
| 7/16" | 16mm | 5/8" |
| 1/2" | 19mm | 3/4" |
| 9/16" | 21mm | 13/16" |
What cars use 14mm spark plugs?
- This 12 point 14mm spark plug socket is compatible with 2007+ BMW 3.0L turbocharged engines such as the N54, N55, N20, N26, S55, N63, B46, B48, and B58.
- Along with certain BMW engines, our thin wall spark plug socket is compatible with a variety of MINI vehicles such as the R55, R56, R57, and R60.
What size is a Chevy 350 spark plug?
ACCEL 0526-4 Spark Plug, 14mm Thread, .
What size socket do I need to pull a spark plug?
The most common socket sizes for spark plugs are 5/8 inch (16mm) and 13/16 inch (20mm), but other sizes like 9/16 inch (14mm) and 3/4 inch (18mm) are also used depending on the vehicle. The exact size depends on the make, model, and age of your vehicle. You may need to check your vehicle's manual or measure the spark plug to find the correct size.
Common spark plug socket sizes
- 5/8 inch (16mm): The most common size, used in many modern and small-engine vehicles, as well as motorcycles.
- 13/16 inch (20mm): Often used in older and larger-engine vehicles.
- 9/16 inch (14mm): Frequently found in Ford vehicles, newer European and Asian cars, and some motorcycles.
- 3/4 inch (18mm): Used in some motorcycles, small engines, and older GM vehicles.
- 11/16 inch (18mm): Used in some motorcycles, small engines, and older BMW vehicles.
You can watch this video to learn about different socket sizes and how to use them: 1mDanny Johnson’s GarageYouTube · Aug 3, 2025
Tips for choosing the right socket
- Consult your vehicle's manual: This is the most reliable way to find the correct size.
- Measure the spark plug: You can measure the hexagonal part of the spark plug to find its size.
- Look for a "spark plug socket": These are specifically designed for spark plugs and often have a rubber insert to protect the porcelain insulator and hold the plug in place.
This video demonstrates how to use spark plug sockets: 51sbeachtrollYouTube · Sep 7, 2018
