What spark plug gap on the 4.0L? - 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 Wrangler Forums > YJ Wrangler Technical Forum > What spark plug gap on the 4.0L?

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineFS: Jeep Fog Light LED Bulbs! Several Brightness Options! Clayton Off Road JK Short Arm Suspension Kits

Reply
Unread 10-06-2011, 01:41 PM   #1
AnonymousD
Registered User
1992 YJ Wrangler 
 
Join Date: Jul 2010
Location: Louisiana
Posts: 903
What spark plug gap on the 4.0L?

I can find my Chiltons OR my Haynes manual and I can seem to really find anything searching around. So what should I gap them to?

AnonymousD is offline   Reply With Quote
Unread 10-06-2011, 02:03 PM   #2
dillonjm
30mm @ 70/sec
 
dillonjm's Avatar
2003 TJ Wrangler 
 
Join Date: Jun 2003
Location: Warrensburg, MO
Posts: 3,938
IIRC its .035
__________________
03 Rubi on 35's (Weekend Toy)

11 Ram 2500 - 6.7 Cummins (DD/Tow Rig)

05 Liberty Limited (Wife's): Minor mods, OME/JBA Suspension, 245 70/17 Duratracs
dillonjm is offline   Reply With Quote
Unread 10-06-2011, 05:41 PM   #3
rkham11
Registered User
2008 JK Wrangler 
 
Join Date: Mar 2011
Location: Friendswood, TX
Posts: 56
.035 is correct
rkham11 is offline   Reply With Quote
Unread 10-06-2011, 05:49 PM   #4
kahjeep
Registered User
2001 TJ Wrangler 
 
Join Date: Apr 2011
Location: Sarnia, Ontario
Posts: 234
^^^ what they said!
kahjeep is offline   Reply With Quote
Unread 01-04-2013, 03:31 PM   #5
maxthegi
Registered User
1994 YJ Wrangler 
 
Join Date: Jun 2012
Location: Zama, Japan
Posts: 88
I knew that if I searched this forum I would find the correct gap somewhere. Thanks for y'alls help.
maxthegi is offline   Reply With Quote
Unread 01-06-2013, 12:51 AM   #6
seattle_yj
Registered User
1993 YJ Wrangler 
 
Join Date: Jun 2012
Location: Issaquah, WA
Posts: 948
Quote:
Originally Posted by maxthegi
I knew that if I searched this forum I would find the correct gap somewhere. Thanks for y'alls help.
Most of the higher end plugs are pre gapped. If you buy from napa they will tell you if it's pre gapped or not.
seattle_yj is offline   Reply With Quote
Unread 01-09-2013, 08:20 AM   #7
TA-YJ
Registered User
1992 YJ Wrangler 
 
Join Date: Dec 2007
Location: Pennsylvania
Posts: 533
Always double check the gap. Ive seen "pregapped" plugs that are like .015-.02 off.
__________________
1992 YJ 2.5L
Engine Mods:4.0L TB, Ford Design III 19lb Injectors, Firepower Ignition System, Ford TBird Electric Fan, Pacesetter Header, Magnaflow Cat, Dynomax Super Turbo Exhaust
Suspension Mods:BDS 2" Lift, M.O.R.E. 5/8" HD Shackles, 1" Brown Dog MML
Other:LED Tails and Herculined
TA-YJ is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





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.