Spark Plugs

The least expensive part in your automobile engine is also one of the most important part – The Spark Plug! Many manufacturers are now claiming many crazy miles between spark plug changes but the reality is that few cars can last that long. This is a simple maintenance task that can save you may thousands of dollars in fuel costs, major breakdowns and more expensive repairs caused by spark plug neglect.

Installation Guide

1. Only attempt to replace the spark plugs on a cool / cold engine

2. Disconnect the plug connector. If disconnecting multiple cables mark them to ensure correct re-asseembly.

3. Loosen the plugs first and clean the surrounding area to ensure no dirt particles get into the combustion chamber.

4. Remove the used spark plugs. If its too tight, loosen it and pour a little oil / kerosene to lubricate the edges before attempting to remove again.

5. Check gap of new spark plugs and adjust if necessary. (check with your local garage or manufacturer handbook.)

6. Thread in the new spark plug by hand until tight. Using a torque wrench and suitable spark plug socket, tighten the spark plug according to the torque guidelines chart below. If a torque wrench is not available, then tighten ¼ of a turn (90 degrees) for gasket type plugs or 15 degrees for tapered seat plugs.

Recommended Torques for Spark Plug Installation

Thread Size

10mm
With Gasket

12mm
With Gasket

14mm
With Gasket

14mm
Tapered Seat

18mm
With Gasket

18mm
Tapered Seat

Torque Ft.-Lbs.

8-11

12-15

19-22

12-15

20-23

14-17

Be careful and avoid overtightening or undertightening as spark plug or engine damage may result. More specifically, if the spark plug does not sit or fit in correctly, you will get a damaged spark plug and will have to repeat the process above. Worse, incorrect spark plug replacement will cause engine damage so please check with someone if you are not confident about replacing the spark plugs yourself.

We stock all kinds of spark plugs but NGK and Bosch spark plugs are the most popular.

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