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  #37  
Old 03-18-2013, 05:14 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

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Originally Posted by JMP8562 View Post
I just replaced the plugs on my 12 limited with the V-8 at 31000 mi.. has anyone else noticed that the plugs showed No need to be changed the gap was right on .43 no sign of over heating (porcelain discoloration) I opted for the lifetime unlimited mi warranty SO i really have no choice but to replace them
Mine were pretty dirty. I was glad to replace them.

I can definitely feel a little bit of a change, seems like it's got a bit more power under foot, and that it takes less gas to get around town.
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  #38  
Old 03-19-2013, 10:20 AM
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Re: DIY: Hemi 5.7L Spark Plug Change

I changed the plugs in my 11 GC at 32,000 and it was an easy job. Old plugs had a much smaller gap than recommended gap. Gapped the new plugs at .044 (did not have .043 gapper) .

Big difference in performance!

One troubling issue - The last plug on the passanger side had oil on the threads, not on the electrode. That was the only plug like that. Is it the sparkplug tube?

Has anyone else experienced this?

Thanks,

Chazmo
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  #39  
Old 03-24-2013, 10:42 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

Than you. Nice job on the post.
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  #40  
Old 03-24-2013, 10:47 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

I was going to run injector cleaner thru my truck before I changed the plugs. Any one have any luck with k n filters change ? Worth it ? I ve seen you tube video where the change of air filter improvement showed no measurable HP increase.
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  #41  
Old 08-07-2013, 12:24 AM
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Re: DIY: Hemi 5.7L Spark Plug Change

Great write up! I changed my plugs at 32,000 today. The tool list was perfect. Also did the cabin air filter and engine air filter. Just for Jeeps delivered in a timely manner and the price was great. Tomorrow I get to go to the dealer for my free oil change and my 32,000 mile service will be done.

Thanks for the help!

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  #42  
Old 10-23-2013, 07:12 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

Mopar has a new NGK Iridium 100K mile plug for 5.7L Hemi's.
For those of you who what to go for the extra cash and extend the service interval to 100K miles.

Mopar # SP-143877AA MSRP $17.25 (They come pre-gapped @ .044")
NGK # 1LZFR5E-11

It was developed by Mopar to be used in their "Police Package" 5.7L hemi engines. It's a Iridium plug made by NGK good for a 100K mile service life, made specifically for Mopars 5.7L Hemi engine. This is the new 100K mile sparkplug Jeep is using in all 2014 WK2 5.7L hemi engines and it can be used in earlier 2011~2013 WK2's.

http://www.ramforumz.com/archive/index.php/t-97496.html

Price comparison to 30K mile NGK copper plugs, with a 20% discount;

"Old" Copper Mopar #SPLZFR5C-11 List $4.95 Net $3.96 Total for 16... $63.36
"New" Iridium Mopar #SP143877-AA List $17.25 Net $13.80 Total for 16 $220.80
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  #43  
Old 10-26-2013, 05:59 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

Did this project on my 2009 Dodge Ram. A bit more difficult than on the GC. It was a 2 hour project, the whole time spent planking across my radiator.
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  #44  
Old 10-28-2013, 07:58 AM
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Re: DIY: Hemi 5.7L Spark Plug Change

Did mine this weekend. I put a dab of Anti-Seize on the plugs before install. 2 hour job for me cause I guess I am ridiculously oversensitive about making sure the gap is perfect. SMH
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  #45  
Old 10-29-2013, 04:52 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

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Originally Posted by Biggie65792000 View Post
In this post it says to tighten spark plugs to 12-14 lbs but on wk2 jeeps, it says 18.5-22 lbs. Which is accurate?

12~14 Foot lbs is not correct!

WK2 Jeeps has it right, as NGK recommends 18~21.6 Foot lbs for these plugs when installed into aluminum heads. Don't forget to coat the threads of the plugs w/anti seize. 100K mile plugs installed into aluminum heads will be a big problem to remove if you skip that step!

NGK Spark Plugs USA
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  #46  
Old 10-30-2013, 08:01 AM
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Re: DIY: Hemi 5.7L Spark Plug Change

I saw this the other day after I put the anti-seize on my plugs.
http://www.ngksparkplugs.com/pdf/tb-...1antisieze.pdf
I am sure I did not over tighten mine...I hope
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  #47  
Old 10-30-2013, 12:32 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

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Originally Posted by BuckeyeSRT View Post
I saw this the other day after I put the anti-seize on my plugs.
http://www.ngksparkplugs.com/pdf/tb-...1antisieze.pdf
I am sure I did not over tighten mine...I hope

Interesting..... I used a torque wrench to install my plugs @18FtLbs. As per NGK's install specs for these plugs into aluminum heads.

I also put a thin coat of anti seize on the threads of each plug. I realize the NGK's have a thin zinc chromate plating on the plug threads but the galvanic corrosion that will occur for two dissimilar metals over thousands of heat cycles and a 100k mile service life isn't going to help when you want to remove those plugs one day! The zinc plated threads on the OEM NGK plugs I removed, that were less than two years old, had already begun to corrode in the aluminum cylinder heads!

NGK's illustration of a novice installer, not using a torque wrench, making novice mistakes when installing sparkplugs shouldn't negate the use on anti seize when installing 100k mile service life plugs. Those plugs look like they were over torqued by a magnitude of three or four beyond the recommended 18~25FtLbs! You'll wish you used a little anti seize if you have to make that next plug change! Trust me on that!
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  #48  
Old 11-27-2013, 12:33 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

I have a 2011 Hemi and torqued the plus to 13 as described. After further reading I noticed it should have been 18-21. Did anyone have issues with it being only 13?
thanks
Joe
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