Blog Post

How to remove the old spark plug

Spark plugs make a gasoline engine run by shooting sparks into and igniting the mixture of air and gas in the engine’s cylinders, causing the cylinders’ pistons to move down and create the power that runs the car. After awhile, spark plugs wear down and need to be replaced. Unlike most car repairs, replacing your own spark plugs does not require any special tools or expertise. Today,we will firstly tell you  how to remove the old spark plug are as follows:

1、Pull out the first spark plug by the boot. The boot is the connector that connects the spark plug wire to the engine. Grasp it and carefully pull it out to detach the spark plug.
Do not pull out more than one spark plug at once. Each spark plug must be connected in a specific place. If you pull them all out at once, you might have trouble figuring out where to reattach them, and that could lead to big trouble for your car. If you want to pull out more than one at once, write down or label each spark plug wire before you take it off. This is important, as on an 8 cylinder engine, you can easily forget which wire goes where.
Do not pull the spark plug out by the wire. Make sure you grasp the boot. If you pull on the wire you could damage it, and new wires cost a few hundred bucks to replace.
If the boot is hard to pull out, you may need to use a pair of boot pliers to nudge it out.

2、Unscrew the old spark plug. Fit the socket wrench with the spark plug socket, and place the socket around the old spark plug. Turn it counter clockwise to unscrew the socket. It should come off easily. If you feel resistance, stop, move the wrench backward, and start over; forcing the plug to unscrew could cause damage to the setting.

3、Clean the threads. The area where the spark plug screws into the wires should be free of dirt and debris before you install the new plug. Use rubbing alcohol and a rag to wipe away any grime before you continue.
Take a look at the electrode end of the old plug. Check to see if there is a carbon buildup on the electrode, or if the gap is filled with dirt. If it is oily, you may have worn rings, and you probably need to take your car to a mechanic to get them replaced. If the plug is tan, the engine is working properly.

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