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Old 01-29-2017, 07:46 PM   #1
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Eating Spark plugs, what you use?

I been putting Champion CS 3570 in my 03'. And they are gapped at 0.045" if i recall.

However, in just a couple years they are opening up to 0.080". I dont know the exact miles, but not nearly enough miles to cause that, i wouldnt think (im a small block chevy guy).

So, is this normal? The truck still runs like a top with the plugs burnt open to 0.070ish or so.

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Old 01-29-2017, 07:49 PM   #2
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Champions are fine...try the NGK's too
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Old 01-29-2017, 07:52 PM   #3
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I was wanting to get those. But I threw those in my chevy one day (first time trying them) and had to pull them out. Truck wouldnt run right at all. So have been very hesitant to jump around on this hemi, without advice. Thanks for the info. Which specific NGK?
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Old 01-29-2017, 07:56 PM   #4
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I think the # is 4356 ...double check me on that...scan through the engine section to find spark plugs and you'll get more answers...
UPDATE:
I believe the # is NGK 5306 for the 5.7...

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Old 01-29-2017, 08:34 PM   #5
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Quote:
Originally Posted by 327 View Post
opening up to 0.080".
Try NGK 4306 spark plugs (a step cooler plug) gaped a .045
Do you have a pic of the spark plug electrodes? You could be running a little lean causing the plugs to burn/wear out quicker. But, if you drive your Ram like you stole it. That could cause that too....
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Old 01-29-2017, 10:07 PM   #6
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Typically the gap will grow .001 for every 2000 miles. I pull mine frequently to inspect, never had a plug in for all that long..
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Old 01-30-2017, 04:47 AM   #7
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Ok thanks. I will try to upload a photo and get an estimation on mileage.
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Old 02-06-2017, 11:35 AM   #8
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I run NGK iridium plugs...
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Old 02-06-2017, 05:41 PM   #9
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NGK 5306s here on both Hemis. I usually get 40K or so. I changed the plugs on the Chrysler when they were at 45K or so. To my surprise, the mileage improved enough to notice.
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