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Hemi spark plug change interval?

55K views 72 replies 38 participants last post by  BuckeyeSRT 
#1 ·
couple questions,I was wondering when the plugs need to be changed on my 2011 Hemi? My dealer told me they need changing at 30k miles. My jeep currently has 26k miles, Should i go ahead and have them changed now or wait till 30k miles? Is this a DIY job or should i let the dealer do it? What else needs to be done at 30k miles? sorry if this has been answered before.:rolleyes:
 
#2 ·
I'd look at your maintenance manual but I highly doubt you need to perform this work. I think most spark plugs last 110k miles....could be wrong because I don't own a jeep yet.
 
#7 ·
this is more of what i was thinking. though i have not owned a jeep yet, to change spark plugs out at 30k miles seems odd. i've owned mustangs my whole life and they will last 80k to 100k miles depending on the type of plug. Sounds like its the copper being used in the Hemi that would cause this.

Why not use iridium then, a better product? i put those in the mustang and not a single issue so far.
 
#5 ·
#10 ·
Considering what we pay for fuel and the (lack of) fuel efficiency in the Hemi, $100 for plugs is less than 2 tanks of fuel. We didn't buy the 5.7 GC because it was cost effective to operate ;)[/QUOTE]

Considering taking my Hemi to the dealer for this work, if its $100-150 for the job I have no problem. If its $300-400 I'm doing it myself. Anyone know what dealers generally get to perform the plug change?



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#12 ·
Considering what we pay for fuel and the (lack of) fuel efficiency in the Hemi, $100 for plugs is less than 2 tanks of fuel. We didn't buy the 5.7 GC because it was cost effective to operate ;)
Considering taking my Hemi to the dealer for this work, if its $100-150 for the job I have no problem. If its $300-400 I'm doing it myself. Anyone know what dealers generally get to perform the plug change?



Sent from my iPhone 5 using Tapatalk[/QUOTE]
Where are you spending $100 for at 16 plugs?:eek:
 
#14 ·
Spark plug change on the 5.7 is pretty easy; I've already done mine and will replace my wife's this weekend. if you have no experience changing plugs this isn't the vehicle I would want to learn on but if you are experienced it's an easy job.
 
#21 ·
Considering taking my Hemi to the dealer for this work, if its $100-150 for the job I have no problem. If its $300-400 I'm doing it myself. Anyone know what dealers generally get to perform the plug change?



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It's about $35 worth of plugs, shipped from Rock Auto. I just ordered mine. You also get an $8 rebate on them.

Beats the heck out of the $15 Iridium plugs my old ride wanted, even though there were only 6.

I don't get why people talk about the plugs like it's some big expense. You do it less often than refill the piss tank on the diesel, and it's cheaper.
 
#23 ·
around $64 for the OEM plugs ordered online, about an hour or so of your time and change the plugs every 30-32k miles on the Hemi.
Oh, and you need 16 of them! Put the OEM copper plugs in - no reason to spend the $$$ for anything else when you have to change them every 32k miles. And no real improvement in performance gain with platinum plugs etc.
 
#27 ·
Yes - NGK - LZFR5C–11G I think they have since dropped the G at the end.
Also known as Mopar - SPLZFRC11
NGK part 92174
 
#41 ·
I have a 2012 GC with the 5.7 hemi. I just completed a round trip from Rochester, NY to Boston driving 420 miles each way on a single tank / leg. I had 40K miles when I departed and original plugs. Note my driving was almost exclusively expressway. Outbound I clocked 20.22 mpg and on the return 21.65 mpg. I've tracked my mileage every tank and it has remained consistent with combined city/highway approx. 17 mpg. Thus I see no need for a 32K plug change and plan to wait for 50K. My previous vehicle was a 98 Durango with the 5.2l. I sold it with 356K - still passing inspection - with plug changes at 100K intervals and thus have difficulty with the recommended 32K. I do plan to change the plugs myself using the excellent guidance from this forum.
 
#44 ·
I just changed my plugs with NGK OEM plugs @ 47,000 taking 1.5 hours from start to finish

The plugs removed looked excellent with the gap @ .044. My mileage was still 17 city/highway and 20-21 highway.

As others have noted on this form the procedure was relatively simple and I would recommend not spending $$$ to have a dealer do so.

Based upon my experience I will wait for another 60,000 before replacing the plugs,
 
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