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How do my old spark plugs look? Changed them today.

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Old 11-14-2017, 11:08 PM
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Originally Posted by spartan99
It's still worth changing them earlier. These 3.8's aren't that fantastic. Those cylinders need all the help they can get and there is a noticeable improvement in how it drives after changing them. Given that these engines are prone to oil getting into the combustion chamber, a good plug makes a difference. Another 30k on those plugs would not be wise imo.
Didn't mean to sound argumentative. Do whatever works for you. Just wanted to point out a common misunderstanding on spark plug gap.
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Old 11-15-2017, 12:39 AM
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You didn't sound argumentative at all my friend.

How's your Jeep? Where are you these days? Somewhere exciting I bet!
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Old 11-15-2017, 07:56 AM
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Originally Posted by spartan99
You didn't sound argumentative at all my friend.

How's your Jeep? Where are you these days? Somewhere exciting I bet!
Just back home last week, in fact ...

https://www.youtube.com/watch?v=vs9801YyIOc
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Old 11-15-2017, 09:23 AM
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Amazing. I gotta check out the rest of your vids. That's really inspiring. I think I'll hit some rookie spots soon I rarely get out there. Very cool!!!
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Old 11-26-2017, 10:34 AM
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Originally Posted by ronjenx
RER8ZWYCB4 (Gap 0.043 in)
Those are for iridium. While I do run iridium's in my Honda, I've seen posts to stick with the OEM plugs, which are not iridium. Any opinions on which way to go?
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Old 11-26-2017, 12:36 PM
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Originally Posted by Grand Umpah
Those are for iridium. While I do run iridium's in my Honda, I've seen posts to stick with the OEM plugs, which are not iridium. Any opinions on which way to go?
The question I answered was "What's the part number or the Champion number for the OEM plugs for a '12 JK?"

I went to the 2012 JK Owner's manual and got the number I posted, which is RER8ZWYCB4.
Why would that not be the number for the '12 OEM plugs?
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Old 11-27-2017, 10:31 AM
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Originally Posted by ronjenx
The question I answered was "What's the part number or the Champion number for the OEM plugs for a '12 JK?"

I went to the 2012 JK Owner's manual and got the number I posted, which is RER8ZWYCB4.
Why would that not be the number for the '12 OEM plugs?
I actually just bought these plugs last week in preparation. They do show compatible for my 2013, and I do see places it says that is the OEM plug......but if I pull the parts diagram on Mopar's site it shows a part number of SP149125AE as the OE plug; however, those are iridium plugs as well -

https://www.amazon.com/Dodge-Charger.../dp/B01C7TYJW6

Lotta people using those Champions and don't see people saying anything bad about em.
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Old 11-27-2017, 12:14 PM
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Originally Posted by resharp001
I actually just bought these plugs last week in preparation. They do show compatible for my 2013, and I do see places it says that is the OEM plug......but if I pull the parts diagram on Mopar's site it shows a part number of SP149125AE as the OE plug; however, those are iridium plugs as well -

https://www.amazon.com/Dodge-Charger.../dp/B01C7TYJW6

Lotta people using those Champions and don't see people saying anything bad about em.
SP149125AE and RER8ZWYCB4 represent the same iridium plug, which is listed as OEM plugs for the 2012 JK inquired about in a post above.
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Old 11-27-2017, 12:40 PM
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Originally Posted by ronjenx
SP149125AE and RER8ZWYCB4 represent the same iridium plug, which is listed as OEM plugs for the 2012 JK inquired about in a post above.
Thanks.
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Old 11-27-2017, 07:14 PM
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Just swapped mine out in Sunday. 2013 JK 3.6. What came out was iridium, so was what I put back.

Attachment 676228

I got the NGK plugs through Rock Auto. So far no complaints. My gas mileage seems to be picking back up to where it was a couple of months ago, and it doesn’t smell like it is running rich anymore.

I changed mine out at 102,500ish miles, I’ve got about 100 miles on them now. The factory plugs where in way better shape than I expected.

Attachment 676229

Too early to say anything except for initial impressions. They seem ok to me. The project wasn’t nearly as bad as I thought it would be, pulling the upper intake plenum (or whatever you call it) really wasn’t all that bad. I tossed in some new o-rings while I was at it.

Attachment 676230

Happy Jeeping!
Last edited by tjkamp; 11-27-2017 at 07:17 PM.
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