The right tool for changing spark plugs

Changing spark plugs is a critical maintenance task that requires the proper tools to ensure efficiency and prevent damage. Utilising a rubberised or magnetic spark plug socket, along with the correct-sized extension, is essential for securing the spark plug during the process.

Here, Bosch Mobility Aftermarket highlights the importance of using the right tools for this task.

Use a rubberised or magnetic spark plug socket and extension in the correct size to prevent:

• the spark plug from falling out or
• sliding too deeply into the tool

The rubber or magnetic insert also provides necessary space between the spark plug and the tool:

• the side space prevents lateral forces on the spark plug
• the space behind the spark plug prevents it from being pushed out by the attached tool

Use a torque wrench
Mount the spark plug by hand as far as it will go, then precisely tighten using the correct tightening torque as indicated on the packaging.

Caution: Spark plugs with solid washer
When using spark plugs with solid washer, the recommended torque is achieved significantly faster than with spark plugs that have a crushable washer. After hand-tightening, only a very small rotation angle may be needed to reach the required torque.