Lexus ES 350 Spark Plug Replacement Guide
29
0

Replacing spark plugs in a 2009 Lexus ES 350 can be a challenging task, especially for the rear plugs. This guide will walk you through the process, providing tips and tricks to make the job easier.
Tools and Materials Needed
- Metric socket set (10mm, 12mm, 14mm)
- 5/8" spark plug socket
- Ratchet and extensions
- Torque wrench
- New spark plugs (NGK or Denso recommended)
- Anti-seize compound
- Dielectric grease
Preparation
Before starting, ensure your engine is cool. Disconnect the negative battery terminal to prevent any electrical issues. Remove the engine cover by unscrewing the bolts at the front and lifting it off.
Accessing the Spark Plugs
Front Spark Plugs
- Remove the plastic covers on either side of the engine bay
- Disconnect the electrical connectors from the ignition coils
- Remove the 10mm bolts securing the coils
- Carefully pull out the ignition coils
Rear Spark Plugs
- Remove the strut tower brace if present
- Disconnect and carefully move aside any wiring harnesses obstructing access
- Remove the metal bracket above cylinder 1 (two 12mm bolts)
- Locate and disconnect the electrical connectors for the rear coils
Removing and Replacing Spark Plugs
- Use the 5/8" spark plug socket to remove the old plugs
- Check the new plugs' gap (should be 0.044 inches or 1.1mm)
- Apply a small amount of anti-seize compound to the threads of the new plugs
- Install the new plugs and torque to 13 ft-lbs (17 Nm)
Reinstalling Ignition Coils
- Apply a small amount of dielectric grease to the inside of the coil boot
- Carefully push the coils back onto the spark plugs
- Secure with the 10mm bolts, torquing to 7 ft-lbs (9.5 Nm)
- Reconnect all electrical connectors
Final Steps
- Double-check all connections
- Reinstall the engine cover and any removed components
- Reconnect the battery
Tips for Success
- Work on one cylinder at a time to avoid mix-ups
- Use a magnetic spark plug socket to prevent dropping plugs
- For rear plugs, a flexible extension or universal joint can be helpful
- Take your time, especially with the rear plugs – patience is key
FAQs About Lexus ES 350 Spark Plug Replacement
- How often should I change spark plugs in my Lexus ES 350?
Typically every 60,000 to 120,000 miles, but consult your owner's manual for specific recommendations. - Can I replace just some of the spark plugs?
It's best to replace all six spark plugs at the same time for optimal engine performance. - Do I need to replace the ignition coils when changing spark plugs?
Not necessarily, but inspect them for damage or oil contamination. If in doubt, replacing them can prevent future issues.
Remember, if you're not comfortable with this task, it's always best to consult a professional mechanic. Improper installation can lead to engine performance issues or damage.
Related Posts
-
2008 Dodge Ram 1500 Water Pump: Essential Guide for Owners
28-01-2025 • 27 views -
2012 Nissan Maxima AC Relay Location Guide
28-01-2025 • 30 views -
Glow Relay Short Circuit: Troubleshooting Guide for Hyundai Sonata
29-01-2025 • 32 views -
Nissan Maxima Alternator Replacement Cost: What You Need to Know
29-01-2025 • 34 views -
2011 Ram 1500: Complete Fuse Box Diagram Guide
29-01-2025 • 20 views
Latest Posts
-
2015 Chevy Traverse AC Recharge Port Location
01-02-2025 • 68 views -
Rear Brake Caliper Piston Won't Compress
01-02-2025 • 60 views -
Power Steering Fluid Leak On Passenger Side
01-02-2025 • 77 views -
How To Turn Off Paddle Shifters Mercedes
01-02-2025 • 69 views -
Are O2 Sensors Covered Under Warranty
01-02-2025 • 66 views
Popular Posts
-
PT Cruiser: Years to Avoid for Buyers
26-01-2025 • 245 views -
Linde Forklift Warning Light Symbols Explained
26-01-2025 • 123 views -
Buick Verano: Years to Avoid for Buyers
26-01-2025 • 129 views -
Turn Off Traction Control Warning Light: Quick Guide
27-01-2025 • 102 views -
Infiniti QX56: Years to Avoid for Buyers
26-01-2025 • 109 views