Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 10-03-2013, 11:27 PM
Member
My Jeep: 2005 4.7L WK
 
Join Date: Jun 2013
Location: mississippi
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 462
jtapscot is on a distinguished road
Spark plugs and gas

What are the best spark plugs? I have an 05 WK 4.7L V8. Also if anyone could tell me how to change them that'd be awesome.. I looked under the hood but didn't really see anything.

Another thing, I've been using regular 87 gas in my tank. Theres a pamphlet in that came with my jeep that its recommended i use 89 octane... Should I switch to 89???
__________________

__________________
Reply With Quote
  #2  
Old 10-04-2013, 11:31 AM
Member
My Jeep: 2008 4.7L WK
 
Join Date: Jun 2011
Location: Gunnison , CO
Posts: 248
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 56897
Bikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond repute
Re: Spark plugs and gas

87 is fine. 89 is reccommended for the hemi.

Use the factory spec bosch or champion plugs from the dealer. Champion was the factory spec inthe early 2000's. I think they switched to bosch in 2005.

You need to remove each coil. They are plugged in. A 10mm bolt holds the coil down. Pull the coils straight up gently. Use a thin wall spark plug socket to remove the plugs. The goin in from the top straight down. Use a dab of anti seize on the plug threads and some dielectric grease on the coil rubbers to maje it easier next time.
__________________

__________________
2008 Laredo X 4.7 with 245/70-17 at2
2013 Hemi Durango Crew
Reply With Quote
  #3  
Old 10-04-2013, 11:55 AM
Member
 
Join Date: Feb 2013
Posts: 90
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 654
LaredoX is on a distinguished road
Thumbs up Re: Spark plugs and gas

STICK WITH OEM!!!
Quote:
Originally Posted by Bikemobile View Post
87 is fine. 89 is reccommended for the hemi.

Use the factory spec bosch or champion plugs from the dealer. Champion was the factory spec inthe early 2000's. I think they switched to bosch in 2005.

You need to remove each coil. They are plugged in. A 10mm bolt holds the coil down. Pull the coils straight up gently. Use a thin wall spark plug socket to remove the plugs. The goin in from the top straight down. Use a dab of anti seize on the plug threads and some dielectric grease on the coil rubbers to maje it easier next time.
__________________
Reply With Quote
  #4  
Old 10-04-2013, 01:08 PM
Member
My Jeep: 2005 4.7L WK
 
Join Date: Jun 2013
Location: mississippi
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 462
jtapscot is on a distinguished road
Re: Spark plugs and gas

Quote:
Originally Posted by Bikemobile View Post
87 is fine. 89 is reccommended for the hemi.

Use the factory spec bosch or champion plugs from the dealer. Champion was the factory spec inthe early 2000's. I think they switched to bosch in 2005.

You need to remove each coil. They are plugged in. A 10mm bolt holds the coil down. Pull the coils straight up gently. Use a thin wall spark plug socket to remove the plugs. The goin in from the top straight down. Use a dab of anti seize on the plug threads and some dielectric grease on the coil rubbers to maje it easier next time.
I saw some at Autozone they were Champion 439.. is that the same as OEM?
__________________
Reply With Quote
  #5  
Old 10-04-2013, 02:13 PM
Premium Member
My Jeep: 2005 4.7L WK
 
Join Date: Apr 2010
Location: Baltimore, MD
Posts: 431
Thanks: 4
Thanked 4 Times in 4 Posts
Rep Power: 2023
swing4terps is on a distinguished road
Re: Spark plugs and gas

Video here. Watch and you should be set.

How To: WK Maintenance Videos
__________________
Reply With Quote
  #6  
Old 10-04-2013, 03:28 PM
Member
 
Join Date: Oct 2010
Posts: 38
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1461
TLPMYD is on a distinguished road
Re: Spark plugs and gas

i heard some guys going with the NGK laser plugs and love them, anyone on here try them? or is it still champions for the 4.7 wk's?
__________________
Reply With Quote
  #7  
Old 10-05-2013, 12:53 AM
Member
My Jeep: 2005 4.7L WK
 
Join Date: Jun 2013
Location: mississippi
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 462
jtapscot is on a distinguished road
Re: Spark plugs and gas

I used the champions. Seemed to work great until my battery completely died right after
__________________
Reply With Quote
  #8  
Old 10-06-2013, 10:00 AM
Member
My Jeep: 2008 4.7L WK
 
Join Date: Jun 2011
Location: Gunnison , CO
Posts: 248
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 56897
Bikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond repute
Re: Spark plugs and gas

Factory spec for your 3.7 is:

Type: ZFR6F-11G (NGK)

Standard resistor-type




OEM P/N SPZFR6F11G


MSRP: $3.70 ea.

.042 in. gap

3/4" reach, 5/8" Hex head

Torque to 20 Ft. lbs.

From WKJeeps.com - 2005-2010 Jeep Grand Cherokee
__________________
2008 Laredo X 4.7 with 245/70-17 at2
2013 Hemi Durango Crew
Reply With Quote
  #9  
Old 10-25-2013, 11:05 PM
Member
My Jeep: 2005 4.7L WK
 
Join Date: Jun 2013
Location: mississippi
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 462
jtapscot is on a distinguished road
Re: Spark plugs and gas

i have a 4.7L
__________________
Reply With Quote
  #10  
Old 10-26-2013, 02:19 PM
Member
My Jeep: 2008 4.7L WK
 
Join Date: Jun 2011
Location: Gunnison , CO
Posts: 248
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 56897
Bikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond reputeBikemobile has a reputation beyond repute
Re: Spark plugs and gas

4.7-L V8 (2005-2007)
(standard on Limited, optional on Laredo) 4.7-L V8 (2008-2010)
(standard on Limited, optional on Laredo)

Type: ZFR6F-11G (NGK)

Standard resistor-type




OEM P/N SPZFR6F11G


MSRP: $3.70 ea.

.042 in. gap

3/4" reach, 5/8" Hex head

Torque to 20 Ft. lbs.


Type: RC12MCC4

"Fired in suppressor seal" spark plugs using a copper core ground electrode.



OEM P/N SPRC12MCC4
(formerly 56028236AA)

MSRP: $3.70 ea.


.040 in. gap

3/4" reach, 5/8" Hex head

Torque to 20 Ft. lbs.

(NOTE: The 4.7L V–8 engine is equipped with copper core ground electrode spark plugs. They must be replaced with the same type/number spark plug as the original. If another spark plug is substituted, preignition will result.)
__________________
2008 Laredo X 4.7 with 245/70-17 at2
2013 Hemi Durango Crew
Reply With Quote
  #11  
Old 10-27-2013, 07:51 AM
dippinsoldier92's Avatar
Member
My Jeep: 2007 3.7L WK
 
Join Date: May 2013
Location: Fort Carson
Posts: 71
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 545
dippinsoldier92 is on a distinguished road
Re: Spark plugs and gas

I use E3 spark plugs in my 07 3.7 and love em
__________________
Reply With Quote
  #12  
Old 12-12-2013, 08:54 AM
DAVY27's Avatar
Premium Member
Photobucket
 
Join Date: Jun 2009
Location: City that Never Sleeps
Posts: 9,111
Thanks: 419
Thanked 147 Times in 139 Posts
Rep Power: 1659998
DAVY27 has a reputation beyond reputeDAVY27 has a reputation beyond reputeDAVY27 has a reputation beyond reputeDAVY27 has a reputation beyond reputeDAVY27 has a reputation beyond reputeDAVY27 has a reputation beyond reputeDAVY27 has a reputation beyond reputeDAVY27 has a reputation beyond reputeDAVY27 has a reputation beyond reputeDAVY27 has a reputation beyond reputeDAVY27 has a reputation beyond repute
Garage
Send a message via AIM to DAVY27
Re: Spark plugs and gas

stick with OEM. NGK for my 09.
__________________

__________________

2009 Jeep Grand Cherokee SRT Design
SRT Exterior,Magnaflow 14590 w/ SRT resonators,V2 CF Medic Hood,Injen Powerflow Intake,Flying Ryan Ported TB,Custom Painted Halo Headlights,HID lows/fogs,SRT Springs,Stillens,Gloss Black SRT Reps,Mopar Spoiler, Custom Painted Moldings with Snakeskin green GC letterings, Mopar Stripe,Tinted LED tails/rear fogs, TLS Harness,Switchbacks, Stage6 5" Tips,Custom Door Handle Leds,5% Tint,Altec Plate,HID Reverse,Mopar Front Emblem/ Rear Logo,Powerwire,Interior Leds,RGB LED cupholders,Mygig,Weathertech Mats,LXHarness Leds,Rear Cargo Light Mod,Lockpic V4,GlossBlack Vinyl Interior Pieces
Reply With Quote
Reply

Thread Tools
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
HO spark plugs. bobthebldr Tech Tips DIY/How To 0 10-27-2012 08:21 PM
Spark PLugs... covet66 Technical Tips/DIY/How-To 1 09-08-2012 03:32 PM
spark plugs artrob1 Tech Tips DIY/How To 6 04-01-2012 11:25 PM
4.7l wj spark plugs.. burton907 Performance Modifications 13 03-21-2010 07:23 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 02:31 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community