A spark plug is quite easy to install and remove. It is one of those jobs that does not need a
professional. But, sometimes, things don’t go as they should, and the plug actually breaks off. This is
when things go from easy to hard. While a properly installed spark plug will come off with ease, a
broken plug will definitely cause problems.
Now, before jumping into the process of broken spark plug removal, let’s find out why a spark plug
breaks and wedges in like that. This is important for you to avoid similar problems in the future.
Why did the spark plug break?
There are many reasons for this. The most common one, though, is improper handling. The other
reasons are as follows:
- The first plug was installed a long time ago.
- Whoever plugged it in first did it with dirty hands.
- Cross-threading happened during installation.
- Whoever installed it used too much force, and that caused it to break.
This clearly tells us that all problems arise during the installation stage. That’s why, despite being an
easy process, it needs attention and care. Also, spark plugs need to be replaced or cleaned and re-
installed on a regular basis. Otherwise, they will get jammed.
How to Remove a Broken Spark Plug?
Now, it is time to discuss how to remove the broken spark plug.
- Make sure the engine has been at rest for quite a while. It should be cold.
- Adjust the engine such that the piston is below the broken spark plug.
- If the hex head has come off, use a square cut easy out tool to extract the rest of the spark
plug. You should never use a spiral cut extraction bit in this case because it is risky. The plug
may wedge itself in tighter because a spiral cut bit can cause expansion.
- Otherwise, you will need a lot of penetrating oil. Soak the plug shell in the oil and leave it for some time. You won’t have to sit there and wait because the wait-time will be long because the oil has to reach the threads and seep into them.
- Now, you can use the spiral cut extraction bit. Choose the right size so that the process is easy. Use steady pressure and rotate it anti-clockwise.
- The broken spark plug will come off quite easily now.
- If you are still facing problems, you should ask a mechanic for help.
Tips for new installation:
- Start the engine after removing the old spark plug. This will remove any particles that may
have settled in the exhaust valve.
- Before installing the new spark plug, remember to use optimal pressure and make sure your
hands are not dirty.
- Replace and clean the spark plug regularly. Ignoring it for a long time can cause multiple
There you go! The process of broken spark plug removal is not complicated, but you can definitely
avoid it by being slightly attentive. After all, your vehicle needs all your love and care if you want it
to last long and give you seamless performance every time!