How to Change Spark Plugs on a Toyota Tundra 4.7L V8
Tools and Materials Needed
- New spark plugs (8)
- Spark plug socket (5/8 inch)
- Ratchet
- Extension bar
- Anti-seize lubricant
- Dielectric grease
Steps
1. Safety First
Before you begin, ensure your Tundra is parked in a safe and well-ventilated area and the engine is cold. Disconnect the negative battery terminal to prevent any electrical accidents.
2. Locate the Spark Plugs
The spark plugs are located on top of the engine. You'll need to remove the engine cover to access them. The engine cover is usually held in place by several bolts or clips.
3. Remove the Ignition Coils
The ignition coils are connected to the spark plugs. They are usually held in place by a single bolt. Disconnect the electrical connector from the ignition coil and then remove the bolt. Pull straight up on the ignition coil to remove it.
4. Remove the Spark Plugs
Use the spark plug socket and ratchet to remove the old spark plugs. Be careful not to cross-thread the spark plugs when you install the new ones.
5. Apply Anti-Seize Lubricant
Apply a small amount of anti-seize lubricant to the threads of the new spark plugs. This will help prevent them from seizing in the future.
6. Install the New Spark Plugs
Install the new spark plugs hand-tight first. Then use the ratchet and spark plug socket to tighten them to the specified torque. The torque specification for Toyota Tundra 4.7L V8 spark plugs is 18 ft-lbs.
7. Apply Dielectric Grease
Apply a small amount of dielectric grease to the rubber boots of the ignition coils. This will help prevent moisture from entering the ignition system.
8. Reinstall the Ignition Coils
Reinstall the ignition coils and tighten the bolts to the specified torque. The torque specification for the ignition coil bolts is 10 ft-lbs.
9. Reinstall the Engine Cover
Reinstall the engine cover and tighten the bolts or clips.
10. Reconnect the Battery
Reconnect the negative battery terminal.
Conclusion
Congratulations! You have successfully replaced the spark plugs on your Toyota Tundra 4.7L V8. This is a relatively easy and inexpensive repair that you can do yourself in about an hour.
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