5.7L My Spark Plug Replacement Experience - Jeep Commander Forums: Jeep Commander Forum
Regular Service / Maintenance This section contains discussion about regular service and maintenance (upkeep) of your Jeep Commander

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post #1 of 4 (permalink) Old Yesterday, 08:13 PM Thread Starter
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5.7L My Spark Plug Replacement Experience

Many thanks to those that shared their experience here.
Besides from a couple setbacks, I found the job not too difficult.

I can't embed pictures or links yet. Sorry.
gallery link would go here...

The plugs I bought were exactly the same from those I pulled.
amazon link would go here...

I bought the wobble socket that was recommended and used it successfully on every plug.
A ratchet with a quick release button is highly recommended.
amazon link would go here...

Also some dielectric grease for protection and to make the next replacement easier.
amazon link would go here...

The single biggest issue I had, and the one that made the job way longer than it should have been, was tearing 2 boots way down in the hole.
As seen in other posts, not using grease can cause the boot to fuse to the plug.
Let me know if you are interested in how I got the torn boots out. It was a pain...

This is how I avoided tearing boots on the other cylinders.

When you have the coil pack loose and try to pop off the boots they will either come off with a little tug, or they won't.
If they don't pop off don't yank on them.
Separate the boot from the coil pack with a pinch - pry with a flat blade screw driver.
They come off pretty easy.
You will be left with a boot and spring in the hole.
Pull out the spring.

Make yourself a little poker out of a thin coat hanger. Use a hammer to flatten the end.
A tie wrap or similar may work as well.

Push the poker gently down the spring hole at different locations around the spark plug to un-stick the boot fused to the plug.
Then give the boot a tug and it should come off.
The boot and spring can be easily re-attached later.

While you have the coil packs off take a look in the spring holes.
There is what looks like a phillips head screw as the conductor.
Every one of mine were rusty and I cleaned them the best I could with a little flat blade screw driver.
Do NOT try to remove the screw down in the hole.
You WILL break off the head. Trust me.

The dielectric grease goes on the ceramic part of the plug - not the electrode.
Dielectric grease is an insulator...

It took me a long time to extract the torn boots.
If not for that, the whole project would have taken 2-3 hours.

Good luck and I hope this saves somebody some time,
Rick

2009 Commander Limited 5.7L
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post #2 of 4 (permalink) Old Yesterday, 08:34 PM
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@rsandberg7425 , thanks for the great write up. Sorry you can not post photos and links yet. Do you have them so that you can add them to your post later?

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post #3 of 4 (permalink) Old Yesterday, 08:37 PM Thread Starter
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Yes, I have all the links ready in a separate doc.
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Quote:
Originally Posted by rsandberg7425 View Post
Yes, I have all the links ready in a separate doc.
Great!

....

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