Replacing spark plugs on the 3.6 Pentastar - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK 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 03-30-2015, 02:27 PM
Thread Starter
  #1
Jeeper
 
Freedom JK's Avatar
 
Join Date: Oct 2013
Location: Baton Rouge, LA
Posts: 2,527
Replacing spark plugs on the 3.6 Pentastar

I am not to the point where I need to change my spark plugs yet, but if any of you are, I found a good web site that has step by step instructions with photos. For those of you that are not very familiar with 3.6 engine, the intake plenum must be removed to access the spark plugs on the driver side of the engine.

Here is the web site.
3.6L Pentastar Spark Plug Step-by-Step Guide (with pics) | DS Jeeps

Freedom JK is offline   Quote
Old 03-30-2015, 03:15 PM   #2
Jeeper
 
2013 Moab's Avatar
 
Join Date: Jan 2014
Location: Sullivan Cnty, NY
Posts: 1,534
Thanks, I'll be doing this soon and just bought the factory manual for some insight, this will be helpful also

2013 Moab is offline   Quote
Old 03-30-2015, 05:00 PM   #3
Jeeper
 
nighowl2000's Avatar
 
Join Date: Sep 2014
Location: Ottawa canada
Posts: 2,090
ug...such a pain for the right side....at least the stock spark plugs are rated to 120 000km
__________________
2014 jku sport S dual top, auto 3.73, max tow package
Mod's - jwm4x4.com grill insert,25" eyourlife LED bar, daystar switch pod fortin remote start,rugged ridge head liners, rubicon express transmission skid plate, smittybilt 76634 SRC Side Armor
nighowl2000 is offline   Quote
Sponsored Links
Advertisement
 
Old 03-30-2015, 05:37 PM   #4
Jeeper
 
BigManAndy's Avatar
 
Join Date: Mar 2011
Location: North Syracuse, NY
Posts: 1,231
First time I popped the hood I knew spark plugs would be a monster pain in the ass. This proves it.
BigManAndy is offline   Quote
Old 03-30-2015, 09:52 PM   #5
Jeeper
 
flash1034's Avatar
 
Join Date: Nov 2011
Location: San Juan Capistrano
Posts: 622
Ughhhh. I don't look forward to that.

Flash
flash1034 is offline   Quote
Old 03-30-2015, 10:43 PM   #6
Jeeper
 
Join Date: Dec 2014
Posts: 242
Quote:
Originally Posted by nighowl2000 View Post
ug...such a pain for the right side....at least the stock spark plugs are rated to 120 000km
Total BS. There is not a need to design it this way. It just scares owners away from doing the job. Ford is the master of this with the transverse mounted 3.0 engine in front wheel drive cars. The 3.0 in the Ranger is not made like this and is simple to work on.
__________________
15 Wrangler JK
03 F350 6.0 diesel
04 Ranger
17 FLRTU
Tennesseepowerstroke is offline   Quote
Old 03-30-2015, 10:44 PM   #7
Jeeper
 
Raspy's Avatar
 
Join Date: Dec 2012
Location: Northern Nevada
Posts: 485
In my earlier reading about the 3.6, they warned that the spark plug tubes are very easily damaged. Be careful. And after seeing the drivers side, I'm not looking forward to it.

If anyone of us does this, we should make notes or video it.
__________________
2013 Rubi 2 dr, six speed, Cherry, hardtop. Rampage recovery bumper, Zeon 10S. 19/60 springs, 255/80r17 Cooper ST Maxx.

John

"I only exaggerate enough to compensate for being taken with a grain of salt."
Raspy is offline   Quote
Old 03-31-2015, 07:23 AM   #8
Jeeper
 
2013 Moab's Avatar
 
Join Date: Jan 2014
Location: Sullivan Cnty, NY
Posts: 1,534
I would also recommend changing the upper to lower intakes manifold gaskets while your in there.
2013 Moab is offline   Quote
Old 03-31-2015, 07:50 AM   #9
Jeeper
 
2013 Moab's Avatar
 
Join Date: Jan 2014
Location: Sullivan Cnty, NY
Posts: 1,534
Quote:
Originally Posted by Raspy View Post
In my earlier reading about the 3.6, they warned that the spark plug tubes are very easily damaged. Be careful. And after seeing the drivers side, I'm not looking forward to it.

If anyone of us does this, we should make notes or video it.
That's correct, here is an exerpt from the factory manual on removal of the spark plugs;

"
  1. Prior to removing the spark plug, spray compressed air into the cylinder head opening. This will help prevent foreign material from entering the combustion chamber.
  1. CAUTION:
The spark plug tubes (1) are a thin wall design. Avoid damaging the spark plug tubes. Damage to the spark plug tube can result in oil leaks.



  1. Remove the spark plug from the cylinder head using a quality thin wall socket with a rubber or foam insert."
I can not copy and paste the picture that accompanies these instructions but I think you get the idea, be careful.
2013 Moab is offline   Quote
Old 04-01-2015, 12:32 PM   #10
Jeeper
 
Join Date: Apr 2012
Location: Fernley, NV
Posts: 1,256
Quote:
Originally Posted by Tennesseepowerstroke View Post
Total BS. There is not a need to design it this way. It just scares owners away from doing the job. Ford is the master of this with the transverse mounted 3.0 engine in front wheel drive cars. The 3.0 in the Ranger is not made like this and is simple to work on.
The transverse 3.8 in the Taurus remains the worst damn thing to work on I've ever dealt with. The old 3.0 Vulcan was a piece of cake though (also in a Taurus)...but the DOHC I can see being a nightmare.
Godholio is offline   Quote
Old 04-01-2015, 12:53 PM   #11
Jeeper
 
flash1034's Avatar
 
Join Date: Nov 2011
Location: San Juan Capistrano
Posts: 622
Wonder what the dealer gets to do a spark plug change? Looks expensive.

Flash
flash1034 is offline   Quote
Old 04-01-2015, 09:58 PM   #12
Jeeper
 
Join Date: Dec 2014
Posts: 242
Quote:
Originally Posted by Godholio View Post
The transverse 3.8 in the Taurus remains the worst damn thing to work on I've ever dealt with. The old 3.0 Vulcan was a piece of cake though (also in a Taurus)...but the DOHC I can see being a nightmare.
I have a 3.0 Escape and it is the same design.
__________________
15 Wrangler JK
03 F350 6.0 diesel
04 Ranger
17 FLRTU
Tennesseepowerstroke is offline   Quote
Old 04-02-2015, 09:37 AM   #13
Jeeper
 
Join Date: Jan 2015
Location: lost causes nm
Posts: 698
Subscribed!
__________________
When young people tell me about their problems I like to tell them that story about the time I survived without my cell phone and the internet for 40 years
rhinorear is offline   Quote
Old 04-02-2015, 10:31 AM   #14
Supporting Member

5-Year WF Supporting Member
 
Join Date: Jan 2015
Location: New Hampshire
Posts: 2,370
Very few front drive V-type engines are any good to work on. Hondas used to have the intake entirely in the vee of the motor allowing total access to the rear. The packaging of the 3.6 into the JK is a bit of a nightmare.

__________________
2015 Anvil JKR
Just a bumper and some lights so far.
Mike-D is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not 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






All times are GMT -5. The time now is 06:00 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.