Top Mistakes: Where to Avoid Lubricating Spark Plugs

Name: Top Mistakes: Where to Avoid Lubricating Spark Plugs
Uploaded: 2025-08-01T00:00:00Z
Duration: 34 s
Description: Learn why you should never use lubricant or anti-seize on spark plugs and the risks involved.

Learn why you should never use lubricant or anti-seize on spark plugs and the risks involved.

Published Aug 1, 2025

Video transcript

Never apply lubricant or anti-seize on the thread of a spark plug. Doing so can affect the torque applied during installation, leading to potential over-tightening or under-tightening, which can damage the engine or cause the spark plug to break. Spark plugs are typically coated by the manufacturer to prevent seizing and corrosion, so additional lubricant or anti-seize is unnecessary and counterproductive.

Questions and answers

What happens if I put lubricant on a spark plug?
Applying lubricant can affect torque, leading to potential engine damage or spark plug breakage.
Do spark plugs come pre-lubricated?
Yes, most spark plugs are coated by the manufacturer to prevent seizing and corrosion.
What's the best way to install a spark plug?
Ensure the threads are clean and dry, and follow the manufacturer's torque specifications carefully.
Can anti-seize be used on spark plugs?
No, using anti-seize on spark plugs is counterproductive and can cause issues during installation.