4.7L Spark plug change - Help please - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WK Grand Cherokee & XK Commander Forum > 4.7L Spark plug change - Help please

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineFS: 2007-2013 Jeep Wrangler "HALO" Angel Eye KitFS: Wranger BRIGHT License Plate LED! Just $3! Great value

Reply
Unread 09-29-2013, 12:11 PM   #1
cobosoxfan
Registered User
 
Join Date: May 2013
Location: Highlands Ranch, CO
Posts: 46
4.7L Spark plug change - Help please

Ok, I'm pretty handy in the engine compartment, but WTF were the Jeep engineers thinking with the configuration of engine and trans dipsticks over back passenger spark plug coil pack???

I looked up under there to see if there was any way to get to the bolt holding the trans tube, but it is in an unreachable spot at the top back of the engine. I'm ready to bend the tube out of the way with brute force but was wondering if there was a better way to get that plug out? I would hate to break it.

Thanks

__________________
2006 GC Laredo, 4.7L, OME HD up front and MD rear, RC spacers 1.5", Hankook ATM's 265/70/17
cobosoxfan is offline   Reply With Quote
Unread 09-29-2013, 02:18 PM   #2
JeepN4KC
Keep on Jeepin on........
 
JeepN4KC's Avatar
 
Join Date: Jul 2011
Location: Blue Springs, MO
Posts: 5,131
What year 4.7?

I know for a fact that the 06 and 07 can be done fairly easy. The rear most 2 are the most difficult but can be done with a plug socket, extension, and ratchet. No elbow needed.
__________________
~Mike~

My Build Thread WK
My Other Build Thread XJ
'01 XJ with some stuff
Sept 2013 Cherokee of the Month
'07 WK with some other stuff
~RED WK CLUB #7~
'11 KK with mostly stock stuff
'06WK our first Jeep with stock stuff - totalled and gone
JeepN4KC is online now   Reply With Quote
Unread 09-29-2013, 02:51 PM   #3
cobosoxfan
Registered User
 
Join Date: May 2013
Location: Highlands Ranch, CO
Posts: 46
Quote:
Originally Posted by JeepN4KC View Post
What year 4.7?

I know for a fact that the 06 and 07 can be done fairly easy. The rear most 2 are the most difficult but can be done with a plug socket, extension, and ratchet. No elbow needed.
Thanks Mike, I ended up having to bend the trans dip stick out of the way. It was directly above the coil pack. The plug was cakework from there. I will say that I don't think it had been done before - ever! There was virtually no core left. After the plugs were done, I spent some time cleaning the Throttle Body, and Mass Air Sensor.

I then unplugged the neg battery cable, did the brake press procedure, and reconnected.

Lets just say this little service work made a huge impact. Quick pedal response, and the engine is running soooo dang smooth. Its awesome.

Thanks, Mike and the rest of the forum for the overall amount of info we as members can find!
__________________
2006 GC Laredo, 4.7L, OME HD up front and MD rear, RC spacers 1.5", Hankook ATM's 265/70/17
cobosoxfan is offline   Reply With Quote
Unread 09-29-2013, 03:07 PM   #4
JeepN4KC
Keep on Jeepin on........
 
JeepN4KC's Avatar
 
Join Date: Jul 2011
Location: Blue Springs, MO
Posts: 5,131
Glad you were able to get 'em.

If they'd never been done I'm sure you noticed a big difference.
__________________
~Mike~

My Build Thread WK
My Other Build Thread XJ
'01 XJ with some stuff
Sept 2013 Cherokee of the Month
'07 WK with some other stuff
~RED WK CLUB #7~
'11 KK with mostly stock stuff
'06WK our first Jeep with stock stuff - totalled and gone
JeepN4KC is online now   Reply With Quote
Unread 09-29-2013, 06:56 PM   #5
bmuhlbach
Registered User
2005 WK 
 
Join Date: May 2008
Location: Hinckley,OH
Posts: 97
There suppose to by done every 36,000 miles I just changed my 05's and the 2 back ones on pass. side are the hardest.
bmuhlbach is offline   Reply With Quote
Unread 09-30-2013, 08:31 AM   #6
Goldenknob
Registered User
2007 WK 
 
Join Date: Jun 2006
Location: Antlers, Ok
Posts: 991
what is the brake press procedure your talking about?
Goldenknob is offline   Reply With Quote
Unread 09-30-2013, 09:43 AM   #7
cobosoxfan
Registered User
 
Join Date: May 2013
Location: Highlands Ranch, CO
Posts: 46
Quote:
Originally Posted by Goldenknob View Post
what is the brake press procedure your talking about?
Disco the neg battery cable open all doors, and depress the brake pedal for 30 seconds, a couple of times; as this is supposed to drain all residual electrical system power, so that the flash memory can relearn the new changes.

To be honest, Im not sure it actually works, as new electronics hold a small charge in them for quite a while. For instance after 5 minutes, I reconnected the battery and the radio still had all of the channels preset.

The flash memory in the CPU may be different??? I've heard it on so many diff truck forums I've been on, I just do it now. Urban legend? Internet Myth? Don't really know.
__________________
2006 GC Laredo, 4.7L, OME HD up front and MD rear, RC spacers 1.5", Hankook ATM's 265/70/17
cobosoxfan is offline   Reply With Quote
Unread 09-30-2013, 09:55 AM   #8
JRLT
Registered User
2010 WK 
 
Join Date: Aug 2011
Location: Lower Brule, South Dakota
Posts: 1,340
Read somewhere else to just ground the positive cable(not the battery) against something metal. I just used a short cable and used the bolt the battery is grounded to on the frame.
__________________
2010 3.7L, 4XGuard Matrix, Fastman TB, TB Ground Mod, Injen CAI, 255/60/18 Nitto Terra Grapplers, Bilstein Shocks & Struts, Cruiser Alloy Wheels - Switchblade, Stillen Brakes, Cargo Light Strip Mod, Electric Ashtray Mod, Jet-powered, Monkey Navigated...
JRLT is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.