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Old 07-23-2012, 05:21 AM
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Question Spark Plugs

Its about time i do my spark plugs and i was just getting everyone's opinion on which spark plugs are worth it i have a 05 GC Limited 5.7. All inputs are welcomed
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Old 07-23-2012, 11:34 AM
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Re: Spark Plugs

ngk 5444 good as gold
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Old 07-23-2012, 12:06 PM
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Re: Spark Plugs

OEM plugs
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Old 07-23-2012, 01:32 PM
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Re: Spark Plugs

Quote:
Originally Posted by SvenskaJeepGuy View Post
OEM plugs
OEM being cause im not the original owner so idk what they have in right now
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Old 07-23-2012, 01:44 PM
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Re: Spark Plugs

OEM Champions, which the Hemi was designed to use, and CHampion is the #1 spark plug in NASCAR and F1.
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Old 07-23-2012, 01:48 PM
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Re: Spark Plugs

I've heard to stick with OEM: Champion 570's. I have done them without issue.
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Old 07-23-2012, 06:22 PM
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Re: Spark Plugs

Quote:
Originally Posted by DaGreenMile View Post
Its about time i do my spark plugs and i was just getting everyone's opinion on which spark plugs are worth it i have a 05 GC Limited 5.7. All inputs are welcomed
Good afternoon,

MOPAR OEM or Champion 570's. Have used both and they perform equally well. The '05-'08 5.7L HEMI plugs are changed at 30K miles anyway. Only difference seems to be price: MOPAR = $4 ( ) and Champion 570 = $2 each ().

Ready for my 4th set of plugs in 900 more miles (about 2.5 weeks' driving). Gap each plug to 0.043" and torque to 13 ft-lb.

One thing I do is tape each plug when it comes out and mark it with the cylinder # and F -or- R so I know where it came from later. You will see that the electrode areas of the MDS cylinder plugs look different from the non-MDS cylinder plugs. I also check the gap of each plug as they come out. Not to record, but to get a feel as to how much the gap has opened over the previous 30K miles. [From experience, it seems ~0.005-0.008" is normal on my 5.7L HEMI.]

Hope this helps. Enjoy your HEMI.
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Old 07-24-2012, 09:51 AM
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Re: Spark Plugs

The OEM Mopars I believe are (the same as) Champion 570's, so no need to buy the plugs from a dealer.
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Old 07-24-2012, 10:07 AM
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Re: Spark Plugs

I have the 4.7L but I used the bosch 4-prong plugs. I saw a notable increase in MPG and throttle response over OEM but they also hadn't been changed in a long, long time.
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Old 08-16-2012, 12:21 AM
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Re: Spark Plugs

Champion 570's ......always
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Old 08-16-2012, 02:44 PM
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Re: Spark Plugs

Are these the same spark plugs used on the 3.7L?
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Old 08-16-2012, 03:52 PM
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Re: Spark Plugs

^^^^^ check for yourself wkjeeps.com
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