Focus ST Spark Plug Socket Size
What is a Spark Plug Socket?
A spark plug socket is a specialized tool used to remove and install spark plugs in an engine. It is designed with a rubber insert or a magnetic interior to securely hold the spark plug during the installation or removal process.
Why is the Spark Plug Socket Size Important?
The size of the spark plug socket is crucial because it determines whether the socket will fit properly onto the spark plug. Using the wrong size socket can lead to damage to the spark plug or the socket itself, making it difficult to remove or install the spark plugs correctly.
Spark Plug Socket Size Chart for Focus ST
When working on a Ford Focus ST, it is essential to know the correct spark plug socket size to ensure a successful spark plug replacement. Here is a chart that provides the spark plug socket size for different model years of the Focus ST:
| Model Year | Spark Plug Socket Size |
|---|---|
| 2013-2014 | 5/8″ (16mm) |
| 2015-2018 | 9/16″ (14mm) |
| 2019-present | 9/16″ (14mm) |
Steps to Replace Spark Plugs in a Focus ST
- Ensure the engine is cool before starting any work.
- Locate the spark plugs. In the Focus ST, they are typically located on the top of the engine, accessible from the engine bay.
- Remove the spark plug wires or ignition coil packs, depending on the specific model year.
- Using the appropriate spark plug socket size from the chart above, attach the socket to a ratchet or extension.
- Insert the socket onto the spark plug and turn it counterclockwise to loosen and remove the spark plug.
- Inspect the old spark plug for signs of wear or damage. If necessary, replace it with a new spark plug of the same size and specifications.
- Apply a small amount of anti-seize compound to the threads of the new spark plug.
- Insert the new spark plug into the spark plug socket and carefully thread it into the spark plug hole by hand to avoid cross-threading.
- Tighten the spark plug using the spark plug socket and ratchet, turning it clockwise until it is snug.
- If applicable, reattach the spark plug wires or ignition coil packs.
- Repeat the process for each spark plug.
By following these steps and using the correct spark plug socket size, you can easily replace the spark plugs in your Focus ST and ensure optimal engine performance.