What tool do I need to remove spark plugs
John Parsons
Updated on April 10, 2026
You’ll need just a few tools to change out the spark plugs on your car. The most important tool is a socket wrench with an extension and a spark plug socket. Spark plug sockets come in two sizes: 5/8 inches and 13/16 inches. Most spark plug sockets have a rubber insert that holds the plug snugly in place.
What size socket do you use to remove a spark plug?
Most spark plugs require a 5/8″ (16mm) size spark plug socket. This refers to the size of the flats on the spark plug that are in contact with the socket. This spark plug requires the 5/8″ spark plug socket, which will probably fit a 3/8 ratchet extension.
How do you drill out a broken spark plug?
To remove the plug, move the piston to Bottom Dead Center, and make sure the engine is cold, even if you have to wait for cool-down. Then soak the broken plug shell with a generous amount of penetrating oil. Give it a few minutes to work, then tap an appropriately sized easy out firmly into the empty shell (Figure 3).
Are spark plugs universal?
While you should buy spark plugs in matching sets for your vehicle, not all spark plugs are universal. Spark plugs come in different sizes with different gaps and are manufactured using a variety of metals. Finding the ones that you need can be difficult.How much does it cost to remove a broken spark plug?
Usually about $3–4, depending on the cost of your spark plug. Most of the time they unscrew like any unbroken spark plug.
Can you mix old spark plugs new?
Misfiring due to excessive heat, quenching, increased fuel consumption and even engine failure can occur from the use of incorrect or mismatched spark plugs, so it’s best to replace all of your spark plugs at the same time, and with the correct type of spark plug, to ensure smooth and consistent operation.
Do you need a special socket to remove a spark plug?
Do I Need To Use A Spark Plug Socket? … no you don’t need a spark plug socket to remove and install spark plugs. A deep socket in the correct size will work in most cases, if enough patience is used and maybe some pliers to go along with the socket.
Is it OK to mix spark plugs?
All spark plug manufacturers cross-reference their plugs with other brands so their brand can be interchanged with other brands. … In other words, any brand of spark plug can be used in any vehicle make or model application assuming the plug has the correct dimensions, design and heat range.What are signs of a bad spark plug?
- Engine has a rough idle. If your Spark Plugs are failing your engine will sound rough and jittery when running at idle. …
- Trouble starting. Car won’t start and you’re late for work… Flat battery? …
- Engine misfiring. …
- Engine surging. …
- High fuel consumption. …
- Lack of acceleration.
Why Does A Spark Plug Seize? … The carbon can build-up around the tip of the spark plug inside the cylinder and will prevent you from removing it. Simply put, the spark plug can become seized. Apart from that, spark plugs can also seize due to corrosion.
Article first time published onCan you use WD-40 to remove spark plugs?
Using WD-40 to repel water from spark plugs, distributors, alternators, and batteries is a good way to prevent corrosion and keep moisture away. You can also use it to ease the removal of spark plugs, especially if there is any rust or corrosion.
Can you put WD-40 in spark plug hole?
WD stands for Water Displacement, so if your spark plugs are wet or you need to drive moisture away from ignition distributors, WD-40 will do the trick. Turn off the vehicle and spray the spark plug wires and the inside and outside of your distributor cap with WD-40.
Is it hard to change your own spark plugs?
Changing spark plugs takes about an hour (for a four-cylinder engine) and will save you at least a hundred bucks in labor if you do it yourself. In most cases it’s a simple job that will help to maintain peak performance and the highest possible gas mileage.
Can you change just 1 spark plug?
It messes with the rotation of the lifetime if you change just one. It will be fine for a quick fix. All of them should be changed at the same time so they match the best performance of the engine.
Can I drive with a blown out spark plug?
You shouldn’t drive with a blown spark plug and since you probably can’t get it out because the heat has welded the spark plug, you need to remove the coil and the inductor wires from the blown spark plug so that way that particular spark plug is disabled and won’t do damage to the engine.
How much does a spark plug replacement cost?
Spark plugs are incredibly inexpensive, often costing less than ten dollars apiece. Now you may need to replace several at once, but it still won’t cost very much. The typical amount you will pay for spark plugs is between $16-$100, while for labor on a spark plug replacement you can expect to pay around $40-$150.
How often should you change spark plugs and wires?
That’s why it pays to replace your spark plug wires before they wear out. We recommend changing them during spark plug changes (whenever your owner’s manual recommends, usually between 60,000 and 100,000 miles).
What happens if you dont use the right spark plug?
If the spark plug fires at the wrong time, this could lead to constant rattling, pinging or knocking sounds. Hard vehicle start. If your car is having trouble starting or just feels disjointed and jerky, your spark plugs may not be working right, and this can lead to misfires and erratic performance.
Do all the spark plugs need to be the same?
All spark plugs have the same function but there are different types that are available for different types of vehicles. This is the most common spark plug available.
What happens if you put the wrong spark plug in your lawn mower?
The engine may not start. And, if it does, using too cool of a plug may cause it to foul either causing the engine to stall, or make future starts after the initial, difficult.
Can you use Liquid Wrench on spark plugs?
Liquid Wrench Penetrating Oil is great for removing stuck spark plugs on weed eaters, ATVs, chainsaws, cars and trucks, etc.