Greetings all,
Since I'm a cheap, I decided to skip the dealer route and change the plugs myself. Although this isn't the easiest thing to swap plugs on, it no were warrants the cost incurred at the dealer and its 100x easier versus a 5.4L Triton.
Labor time: 30-40~ minutes
Spark Plugs: NGK 93476 (these are the SAME plugs JLR uses on these motors and want to charge you 35-45$ a plug)
Tools needed:
Various socket extensions
Swivel socket
T30 Torx Bit
Flat head screw driver
9/16 Spark Plug Socket (not needed but makes the job WAY easier)
Step One:
Remove the plastic engine cover, it comes off by lifter the front up slight and pulling it forward.
Step Two:
Remove the passenger side foam insulator. This can be pulled up from the front of the engine and shimmied out.
Step Three:
Unplug the VVT solenoid and loosen the wiring harness that covers the coils on the passenger side. This can be done by either pushing down on the plastic tabs or using a flat head to assist. The plastic wiring harness bracket will become free and you can move it out of your way when removing the coils/plugs. No need to disconnect any injectors.
Step Four:
Disconnect the 3 coils. There is a grey retaining clip that slides up which will allow the plug to be depressed and pulled off the coil. A small flat head or healthy finger nail works to side the retainer up. Be careful to not go crazy and launch the retainer into no mans land.
Step Five:
Once the coils are disconnected, use a T30 torx bit the unbolt the coils. Once unbolted the coils just pull right up off the plug. Please note, the bolt is not retained to the coil and can fall out.
Step Six:
Remove the spark plugs with either a 9/16 deep socket or spark plug socket. You may need to daisy chain extensions to help assist. Do not use an impact wrench/gun. The plugs may be a bit stiff so try to use consistent pressure.
Step Seven:
Make sure to always check the gap on the new plugs. JLR states the gap should be .032. The new plugs are torqued to 20nm and the coils are 7nm. Push the coils down on the plug and make sure they are properly seated on the plug.
Step Eight:
Plug in the coils and push the grey retainer clip down securing the coil plug.
Step Nine:
Plug in the VVT solenoid and re-secure the the plastic wiring harness assembly.
Step Ten: Honestly, the worst part. Enjoy wrangling the foam insulator back into position. It has a pedestal that it secures to.
Step Eleven: Driver Side
This side is easier except for cylinder #4. Which I had to get creative with a swivel socket and extensions. The process is the same except for the fact that you do not need to move the wiring harness. What makes it a bit easier is the foam can be pushed downwards out of the way instead of trying to remove the coolant lines from the intake manifold. There is also a bracket that holds two lines to the manifold. Remove the bolt with a T30 so you can move the lines out of you way.
Step Twelve:
Slide the foam up and make sure its secured. Re-attach the bracket removed in the photo above and install the engine cover.
Step Thirteen: Profit!
Make sure to inspect the new plugs as well. RockAuto decided to be big brain and send my plugs in the very small box with no padding. The gaps were all fine but I noticed Cylinder #3 was missing randomly. Upon inspection and removal, the porcelain was cracked and the plug was grounding out. Lucky for me a local auto parts store had a plug in stock which solved the issue.
Since I'm a cheap, I decided to skip the dealer route and change the plugs myself. Although this isn't the easiest thing to swap plugs on, it no were warrants the cost incurred at the dealer and its 100x easier versus a 5.4L Triton.
Labor time: 30-40~ minutes
Spark Plugs: NGK 93476 (these are the SAME plugs JLR uses on these motors and want to charge you 35-45$ a plug)
Tools needed:
Various socket extensions
Swivel socket
T30 Torx Bit
Flat head screw driver
9/16 Spark Plug Socket (not needed but makes the job WAY easier)
Step One:
Remove the plastic engine cover, it comes off by lifter the front up slight and pulling it forward.
Step Two:
Remove the passenger side foam insulator. This can be pulled up from the front of the engine and shimmied out.
Step Three:
Unplug the VVT solenoid and loosen the wiring harness that covers the coils on the passenger side. This can be done by either pushing down on the plastic tabs or using a flat head to assist. The plastic wiring harness bracket will become free and you can move it out of your way when removing the coils/plugs. No need to disconnect any injectors.
Step Four:
Disconnect the 3 coils. There is a grey retaining clip that slides up which will allow the plug to be depressed and pulled off the coil. A small flat head or healthy finger nail works to side the retainer up. Be careful to not go crazy and launch the retainer into no mans land.
Step Five:
Once the coils are disconnected, use a T30 torx bit the unbolt the coils. Once unbolted the coils just pull right up off the plug. Please note, the bolt is not retained to the coil and can fall out.
Step Six:
Remove the spark plugs with either a 9/16 deep socket or spark plug socket. You may need to daisy chain extensions to help assist. Do not use an impact wrench/gun. The plugs may be a bit stiff so try to use consistent pressure.
Step Seven:
Make sure to always check the gap on the new plugs. JLR states the gap should be .032. The new plugs are torqued to 20nm and the coils are 7nm. Push the coils down on the plug and make sure they are properly seated on the plug.
Step Eight:
Plug in the coils and push the grey retainer clip down securing the coil plug.
Step Nine:
Plug in the VVT solenoid and re-secure the the plastic wiring harness assembly.
Step Ten: Honestly, the worst part. Enjoy wrangling the foam insulator back into position. It has a pedestal that it secures to.
Step Eleven: Driver Side
This side is easier except for cylinder #4. Which I had to get creative with a swivel socket and extensions. The process is the same except for the fact that you do not need to move the wiring harness. What makes it a bit easier is the foam can be pushed downwards out of the way instead of trying to remove the coolant lines from the intake manifold. There is also a bracket that holds two lines to the manifold. Remove the bolt with a T30 so you can move the lines out of you way.
Step Twelve:
Slide the foam up and make sure its secured. Re-attach the bracket removed in the photo above and install the engine cover.
Step Thirteen: Profit!
Make sure to inspect the new plugs as well. RockAuto decided to be big brain and send my plugs in the very small box with no padding. The gaps were all fine but I noticed Cylinder #3 was missing randomly. Upon inspection and removal, the porcelain was cracked and the plug was grounding out. Lucky for me a local auto parts store had a plug in stock which solved the issue.
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