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Unread 10-13-2013, 09:54 AM   #1
2jk1cjtj
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2008 JK Wrangler 
 
Join Date: Jan 2010
Location: Lafayette In., Ind.
Posts: 60
Spark Plugs

I got almost 70,000 on the clock witch is the best spark plugs to use and should I replace the wires too.

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Unread 10-13-2013, 12:37 PM   #2
RockyClymer
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2008 JK Wrangler 
 
Join Date: Apr 2008
Location: Colorado
Posts: 4,464
Stock plugs work fine and I would replace the wires if it were me.
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Unread 10-16-2013, 10:55 AM   #3
blackjeep05
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2008 JK Wrangler 
 
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I replaced my plugs with the Autolite Irdiums don't know the part number off hand but, Jeep seems to run great. As long as you run at least double platinums you will be fine. I went with the Duralast plug wires with the lifetime warranty and so far so good with those. The plug wires can be a bugger to route behind the engine but, other than that its a easy job. I would also change your PCV Valve its only 10 bucks from the dealer and its just good piece of mind. Mine had 80k when I replaced everything and the valve had a little bit of oil seeping by. Engine runs smooth as silk now. One thing if you decide to change the valve you will need a socket to fit over the new one to lightly tap it in so it seals in the valve cover. Otherwise you will get oil seeping all over it. Taking the old one out if you don't want to damage it put a zip tie around the top and pull it up with pliers.
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Unread 10-16-2013, 05:56 PM   #4
Waltjason
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2011 JK Wrangler 
 
Join Date: Dec 2010
Location: Waynesville, MO
Posts: 194
Good old stock Champion plugs is what I used. The jeep ran fine with them new so decided why try something different. My two cents worth.
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Unread 10-17-2013, 03:25 PM   #5
ROCKR8R
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2008 JK Wrangler 
 
Join Date: Sep 2013
Location: Phoenix, AZ
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I heard the 3.8L doesn't like fancy shmancy triple platinum, double iridium, quadruple unobtainium. Stock plugs work fine..

-Dan
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Unread 10-17-2013, 03:27 PM   #6
inspmark
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2011 JK Wrangler 
 
Join Date: Sep 2013
Location: Bradford, PA
Posts: 22
Yup, stock Champion for me also. Changed mine with 100k, and the still were at about .055".
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Unread 10-17-2013, 07:52 PM   #7
Neo1130
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Quote:
Originally Posted by ROCKR8R View Post
I heard the 3.8L doesn't like fancy shmancy triple platinum, double iridium, quadruple unobtainium. Stock plugs work fine..

-Dan
You will hear this for every engine on every sort of vehicle possible... I did go with the regular platinum NGK's though gaped at .045" with no issues so far. Runs great!
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