Is it safe to change just one 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.
How do you remove 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).
When do spark plugs need to be replaced?
No. The warranty expired at 36,000 miles, and the spark plugs are not normally replaced until 100,000 miles. If there had been a specific reason (other than customer request) to change plugs while the vehicle was under warranty, then removal of broken plugs would have been covered.
What happens to a spark plug when it breaks?
The lower portion (tube) of the shell remains in the head, and the rest of the plug comes out. The entire porcelain insulator and lower portion of the shell remain in the head. The upper section of the porcelain breaks off, leaving part of the porcelain in the head with the lower portion of the shell.
Can a spark plug be removed from a Ford Explorer?
Another issue is what Ford refers to as “difficulty with spark plug removal” from 4.6-liter, 5.4-liter, and 6.8-liter 3-valve engines. My 2006 Ford Explorer, which is equipped with a 4.6-liter 3-valve engine, was misfiring and had more than 90,000 miles on the original spark plugs, so I decided to change the plugs.
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).
The lower portion (tube) of the shell remains in the head, and the rest of the plug comes out. The entire porcelain insulator and lower portion of the shell remain in the head. The upper section of the porcelain breaks off, leaving part of the porcelain in the head with the lower portion of the shell.
No. The warranty expired at 36,000 miles, and the spark plugs are not normally replaced until 100,000 miles. If there had been a specific reason (other than customer request) to change plugs while the vehicle was under warranty, then removal of broken plugs would have been covered.
Another issue is what Ford refers to as “difficulty with spark plug removal” from 4.6-liter, 5.4-liter, and 6.8-liter 3-valve engines. My 2006 Ford Explorer, which is equipped with a 4.6-liter 3-valve engine, was misfiring and had more than 90,000 miles on the original spark plugs, so I decided to change the plugs.