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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 02-20-2011, 11:45 AM
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Default New Spark Plugs

I have been doing a number of scheduled maintenance items and decided that the spark plugs were next up.
I struggled with staying with the original copper plugs or upgrading to platinum, double platinum or even iridium.
In my research I found that Autolite has a mail-in rebate program for their spark plugs so I decided to use their AP5263 which is a single platinum. Cost each from Napa was $3.19 and the rebate was $1.25 each making a final price of $1.94. Not too much more than the standard copper plugs.
It seems the biggest advantage for any of the upgraded plugs is extended life. The single platinum plugs I installed said they had a 3 year life span. We will see. The plugs I removed had over 52,000 miles and had a perfect light tan color. There was a slight amount of wear on the electrode.
I will say the installation was a little difficult. Started on the drivers side. The last two sets were barely accessible so I decided to remove the tire and wheel well liner to get better access.
The passenger side was pretty straight forward. I did remove my TrueFlow intake and the stock air box.
Take your time. You will need at least 3 hours. Be sure to gap at .045". Because the threads on the AP5263's are not plated I made sure to use an anti-seize compound so there will be no issues down the road.
I figured I saved at least $150 by doing this myself.
Doug
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Old 02-20-2011, 11:52 AM
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Kinda hard to see what the electrode looks like . But I would imagine having 52k on them they are probably pretty worn . I believe they should of been replaced at 30K . I have heard Ramtech (Randy) talk about trying to stay away from the platinum tipped plugs . Hopefully they won't give ya any problems . I personally would try to stick with the straight forward copper core plug . I need to change out my plugs on my SRT8 car and am going to change them out with NGK's .
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Old 02-20-2011, 12:18 PM
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Unless you're willing to run the risk of melting your coil packs, you should get those platinum plugs out of your engine. Iridiums are a better choice if longevity is what you want.
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Old 02-20-2011, 12:24 PM
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Quote:
Originally Posted by Toms Blue Ram 1500 View Post
Kinda hard to see what the electrode looks like . But I would imagine having 52k on them they are probably pretty worn . I believe they should of been replaced at 30K . I have heard Ramtech (Randy) talk about trying to stay away from the platinum tipped plugs . Hopefully they won't give ya any problems . I personally would try to stick with the straight forward copper core plug . I need to change out my plugs on my SRT8 car and am going to change them out with NGK's .
You are absolutely right about the 30K change interval. I am not sure why Dodge has a problem with the exotic plugs. It is even more confusing when all of the plug manufacturers suggest that platinum or better are recommended. Some manufacturers recommend the better plugs because the Hemi has a "Wasted Spark" ignition system. This is according to their application guides. I am not really sure the Hemi falls under this category according to this.
I can not see what effect having a plug with better wear ability will have.
Are they worried about having too long of a replacement schedule ?
Any comments are welcomed.
Doug
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Old 02-20-2011, 12:36 PM
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Quote:
Originally Posted by RamTech View Post
Unless you're willing to run the risk of melting your coil packs, you should get those platinum plugs out of your engine. Iridiums are a better choice if longevity is what you want.
I hope this is not the case. I checked Champion, NGK and Autolite and all three makers suggest to use platinums.
Doug
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Old 02-20-2011, 02:08 PM
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It's a very real possibility. I've seen it happen before and at $65 each, I wouldn't chance it.
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Old 02-20-2011, 02:53 PM
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Dodge doe's not recommend anything but regular plugs in the 5.7, all the plug manufacturers will say the other plugs will work but there not going to buy you a new coil pack. Our coil packs are kind of touchy when it come's to the amount of resistance on them.
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Old 02-21-2011, 03:04 AM
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If the original OEM plugs went to 52,000 miles (with no problems) and you were supposed to change them out at 30,000
then why not stick with the OEM plugs(?)

I really dont see the point in using those expensive "HOLLYWOOD STAR" sparkplugs because platinum/iridium are overpriced.
I`ve also seen those high priced "hollywood star" sparkplugs ruin the coil packs in the past.
Just my 2cents, and to each their own, i`ll just stick with what the vehicle came with.
In my opinion, if it came with platnum/iridium, then i would re-install them with those.
But being my truck prolly has standard copper, then thats what the ole`boy will get.

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Last edited by HEMI5150; 02-21-2011 at 03:15 AM.
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Old 02-21-2011, 03:17 AM
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Quote:
Originally Posted by Burkdadhemi View Post
Dodge doe's not recommend anything but regular plugs in the 5.7, all the plug manufacturers will say the other plugs will work but there not going to buy you a new coil pack. Our coil packs are kind of touchy when it come's to the amount of resistance on them.
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Old 02-21-2011, 12:55 PM
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i think the plug mfg's don't do their homework when it comes to recommending plugs.. I've tried platinums, iridiums and finally came back to coppers for reliability as well as performance...NGK's is all I'll ever install in my truck now...
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