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  #73  
Old 06-04-2014, 10:11 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

Got mine on online from a mopar parts dealer.. About 30% less than dealer, as I said, about 200$. Ouch. I checked every one, and the gap was perfect on every one.
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  #74  
Old 06-14-2014, 03:43 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

604,

Thanks for the write up. With my dad's help, finished in just under 2 hours on our first 16 spark plug change on my 2012 5.7L WK2. Was just right at 30,000 miles. I got the 16 spark plugs from justforjeeps for $60 plus shipping so $71 total. Gap was perfect on all 16. Little to no wear on the 16 replaced plugs.
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  #75  
Old 07-18-2014, 09:16 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

This is a helpful write up, I'm tackling mine tomorrow.


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  #76  
Old 07-20-2014, 11:19 AM
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Re: DIY: Hemi 5.7L Spark Plug Change

I pulled the plugs on my '14 WK2 Summit 4x4 5.7 and the stock plugs are NGK IR plugs. Looks like they should be good for a lot more than 30k?

Thoughts?

I bought copper plugs thinking thats what I had, but now that I know they are iridium with platinum cores, I am not sure if i should waste the time and/or money.
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  #77  
Old 07-20-2014, 11:22 AM
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Re: DIY: Hemi 5.7L Spark Plug Change

Answered my own question:

http://www.wk2jeeps.com/Misc/mainten..._2013_2014.pdf

Shows they are a 100k item to replace. I will put them back in and motor on.


Quote:
Originally Posted by h2obuff View Post
I pulled the plugs on my '14 WK2 Summit 4x4 5.7 and the stock plugs are NGK IR plugs. Looks like they should be good for a lot more than 30k?

Thoughts?

I bought copper plugs thinking thats what I had, but now that I know they are iridium with platinum cores, I am not sure if i should waste the time and/or money.
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  #78  
Old 07-20-2014, 01:54 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

Quote:
Originally Posted by h2obuff View Post
Answered my own question:

http://www.wk2jeeps.com/Misc/mainten..._2013_2014.pdf

Shows they are a 100k item to replace. I will put them back in and motor on.
Sweet!
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  #79  
Old 07-21-2014, 08:48 AM
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Re: DIY: Hemi 5.7L Spark Plug Change

Planning on tackling this on Saturday. Going with the mopar copper plugs since they are a lot cheaper than the NGK IR plugs and I doubt I'll have the jeep for another 30k miles. I guess my main questions after reading this thread are:

1. I don't need to use antisieze since the copper plugs are pulled every 30k miles, correct?
2. The correct torque specs are 18-21ft/lbs for the copper plugs, not the initially stated 13ft/lbs?
3. The plugs listed on justfor jeeps says they are nickel plugs, I thought oem was copper?
http://www.justforjeeps.com/095hesppl.html
The part number is different too. OEM is SPLZFRC11 versus SPLZFR5C11 on justforjeeps.

Thanks.
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Old 07-21-2014, 09:34 AM
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Re: DIY: Hemi 5.7L Spark Plug Change

Quote:
Originally Posted by amill View Post
Planning on tackling this on Saturday. Going with the mopar copper plugs since they are a lot cheaper than the NGK IR plugs and I doubt I'll have the jeep for another 30k miles. I guess my main questions after reading this thread are:

1. I don't need to use antisieze since the copper plugs are pulled every 30k miles, correct?
2. The correct torque specs are 18-21ft/lbs for the copper plugs, not the initially stated 13ft/lbs?

Thanks.
I checked with my dealer (2012 5.7l hemi GC) and the torque spec is 18-21ft/lbs. I have done one change at 46,000 miles with plugs showing little wear with no decrease in mileage or performance before changing. I replaced with NGK OEM plugs and now at 65,000 have seen no decrease in mileage or performance. Unless I see a mileage and/or performance change I will not change again until 100K and will use copper core plugs. As applying anti-seize only takes a few minutes, I did use it for my first change and will use it for subsequent changes.
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  #81  
Old 07-21-2014, 11:37 AM
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Re: DIY: Hemi 5.7L Spark Plug Change

Quote:
Originally Posted by amill View Post
Planning on tackling this on Saturday. Going with the mopar copper plugs since they are a lot cheaper than the NGK IR plugs and I doubt I'll have the jeep for another 30k miles. I guess my main questions after reading this thread are:

1. I don't need to use antisieze since the copper plugs are pulled every 30k miles, correct?
2. The correct torque specs are 18-21ft/lbs for the copper plugs, not the initially stated 13ft/lbs?
3. The plugs listed on justfor jeeps says they are nickel plugs, I thought oem was copper?
2009-2013 5.7L HEMI Spark Plugs - Mopar # SPLZFR5C11
The part number is different too. OEM is SPLZFRC11 versus SPLZFR5C11 on justforjeeps.

Thanks.
No Anti-sieze needed
From NGK: http://www.ngksparkplugs.com/pdf/tb-...1antisieze.pdf

Torque 18.5-22lbs
Jeep Grand Cherokee WK2 - Maintenance information and schedules

Part number from NGK website:
LZFR5C-11 (SP is Standard Performance)
http://www.ngksparkplugs.com/part_fi...uv/results.asp
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  #82  
Old 09-01-2014, 10:45 AM
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Re: DIY: Hemi 5.7L Spark Plug Change

Pulled on the coil pack connector and it seems tight...are there any tabs to press on the connector or are they just tight?
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  #83  
Old 09-02-2014, 05:18 PM
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Quote:
Originally Posted by Pillbucket View Post
Pulled on the coil pack connector and it seems tight...are there any tabs to press on the connector or are they just tight?
OK I did the swap today and found the connectors are just tight...a little pulling and they came right off. All in all not too bad but the plugs that came out looked very good with no corrosion, pitting, or arc damage. It seemed like a waste to throw them away.
I did notice the GC seems to run smoother though so it seems worth it for sure.
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  #84  
Old 09-18-2014, 05:37 PM
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Re: DIY: Hemi 5.7L Spark Plug Change

I have a 2011 5.7 Hemi Limited Grand Cherokee. I asked my dealer if they would put the NGK IR plugs in instead of the copper ones. They insisted that they had changed the head design in the newer Hemis and if you put the IR plugs in them it will burn up the cylinder heads. Said the IR gets way hotter. Sounds like bull but I did not want to risk it so I had them put the copper ones in.

What yall think?
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