04 Spark plug change - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 12-21-2009, 01:35 PM   #1
Jeeper
 
soundline's Avatar
 
Join Date: Sep 2006
Location: Selah, WA
Posts: 126
04 Spark plug change

Okay, I'm really going to fix this crap this time. Not taking it to the "new jeep" dealer either, since they can't seem to get the job done, I'll turn it over to you guys.

I just need to know if there is anything special I need to know when taking the direct coil pack off my 04 4.0l engine to swap out the spark plugs. Here in Yakima we changed jeep dealers as part of the chrysler restructure and they don't have anyone who knows anything about the 2004 jeeps. So if you guys have done this and can give me some pointers I'd really appreciate it. I have the spark plugs from the jeep dealer and the dielectric grease, so now I'm just making sure that's all I need.

And what's the part number for the flasher control module for the 2004 4.0L. They've sold me the wrong one... again...

Thanks,
Adam

__________________
OIF Veteran and VFW Member
92 YJ
09 3500 Dually
soundline is offline   Quote Quick Reply
Old 12-21-2009, 02:12 PM   #2
Jeeper
 
Atthehop's Avatar
 
Join Date: Jul 2008
Location: NW, NJ
Posts: 3,778
Quote:
Originally Posted by soundline View Post
Okay, I'm really going to fix this crap this time. Not taking it to the "new jeep" dealer either, since they can't seem to get the job done, I'll turn it over to you guys.

I just need to know if there is anything special I need to know when taking the direct coil pack off my 04 4.0l engine to swap out the spark plugs. Here in Yakima we changed jeep dealers as part of the chrysler restructure and they don't have anyone who knows anything about the 2004 jeeps. So if you guys have done this and can give me some pointers I'd really appreciate it. I have the spark plugs from the jeep dealer and the dielectric grease, so now I'm just making sure that's all I need.

And what's the part number for the flasher control module for the 2004 4.0L. They've sold me the wrong one... again...

Thanks,
Adam
I have the Factory Service Manual and Parts Fiche for the 04. I have a 4cyl so I cannot answer your question.

PM me if interested,

__________________
Retired my 94 YJ 4cyl 5spd @ 200K
Now in a 04 TJ 4cyl 5spd CV @120K+
Both as a commuter vehicle in NW, NJ
April 2012.downsized and now a 99er.
Atthehop is online now   Quote Quick Reply
Old 12-21-2009, 02:45 PM   #3
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
Easy.

Remove the connector at the back of the coil rail - makes it easier to reach. To do it find the red tab on it, pull it out so it extends about 3/8", then unplug it. If the red tab pulls all the way off, when putting it back together use a tie wrqp to mqke sure the connector stays on tight.

Then remove the 3? bolts going through the coil rail.

GENTLY pull the entire rail off the plugs - evenly.

The #1 plug is hardest to reach - use a wobbly right on the socket.

Replacing - Use a short piece of vacuum line - slip it on the end of the plug when putting them back in - use the vacuum line to turn the plug at least until you are satisfied that it's not crossthreaded.

Use graphite on the threads, and a dab of silicone dielectric grease on the boots.

Replace the bolts, secure the connector -- Done!
__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote Quick Reply
Old 12-21-2009, 04:24 PM   #4
Jeeper
 
soundline's Avatar
 
Join Date: Sep 2006
Location: Selah, WA
Posts: 126
You're a life saver.

Do you have the torque specs on the spark plugs?

I'm going to take my camera out with me tomorrow when I do this so I can post up a DIY for it, utilizing your instructions of course, so expect to be in the credits list when I get that done and up.
__________________
OIF Veteran and VFW Member
92 YJ
09 3500 Dually
soundline is offline   Quote Quick Reply
Old 12-21-2009, 06:52 PM   #5
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 31,209
Images: 2
Torque-wise, you'll be fine if you just get them in fairly firmly with a 3/8" drive ratchet wrench. Don't use a 1/2" ratchet drive handle which due to its greater leverage could easily overtighten the plugs and strip them out. Also use a minimal amount of antiseize compound on the threads so none get onto spark plug gap area. Also, remember to thread the spark plugs fully in with your fingers before using the ratchet wrench on them. That prevents cross-threading the threads.

Finally, your newer distributorless engine is fairly fussy about its spark plugs. If you want to use platinum plugs for their significantly longer life, be sure to ONLY use a double-tipped platinum plug which means it has the platinum coating on both sides of the gap. A single-tipped platinum plug will eventually cause problems.

Two very good double-tipped platinum plug models that run very well in the newer 4.0L engine include the Champion 7034 or Autolite APP985 (NOT the AP985).
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 12-21-2009, 09:16 PM   #6
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
27 ft-lbs
Using Jerry's method will get you very close if not dead-on.
__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote Quick Reply
Old 12-22-2009, 12:16 AM   #7
Jeeper
 
Join Date: Oct 2009
Location: San Diego
Posts: 759
Yup its not too bad changing spark plugs, provided my friend who knew alot more about Jeeps ended up tightening them down, but I took them out = ) I also broke 2 but got them out.
terrible2 is offline   Quote Quick Reply
Old 07-19-2013, 07:41 PM   #8
Newb
 
cb_cooke's Avatar
 
Join Date: Jul 2013
Posts: 1
I didn't catch the recommended gap

cb_cooke is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Spark plug and fluids questions... ps49556n TJ Tech Forum 7 12-14-2009 03:02 PM
Spark Plug Wire Diagram uscchris YJ General Discussion Forum 1 08-04-2009 07:52 AM
Spark Plug HELL Willbanks TJ Tech Forum 44 04-18-2009 11:51 PM
Spark plug questions 2002TJX TJ Tech Forum 13 01-25-2008 06:03 PM
Spark plug question . 409biscayne TJ Tech Forum 26 04-07-2007 12:49 AM



» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 10:43 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC