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-   -   Hemi spark plugs (http://www.jeepgarage.org/f156/hemi-spark-plugs-50465.html)

Biggie65792000 11-18-2012 11:43 PM

Hemi spark plugs
 
It's about time for these to be changed on my Jeep. Has anyone changed them yet? Just wondering if anyone has any tricks or time-saving tips. Thanks.

nek121328 11-19-2012 10:29 AM

Re: Hemi spark plugs
 
Time saving tip would be to install Iridium plugs like the Champion 9055 (REC12WMPB5) in the 5.7L. The plugs have a 7 year unlimited mileage warranty.
The metal shell is treated with a product to virtually eliminate rusting, corrosion and provides an anti-seize treatment on the threads.

JMP8562 11-19-2012 12:01 PM

Re: Hemi spark plugs
 
Quote:

Originally Posted by nek121328 (Post 712929)
Time saving tip would be to install Iridium plugs like the Champion 9055 (REC12WMPB5) in the 5.7L. The plugs have a 7 year unlimited mileage warranty.
The metal shell is treated with a product to virtually eliminate rusting, corrosion and provides an anti-seize treatment on the threads.

will the Iridium plugs interfere with the warranty

heiniken 11-19-2012 01:18 PM

Re: Hemi spark plugs
 
I am just gearing up to do this myself this week. There are a number of threads (on here and other forums w/ HEMI owners) which caution using anything but the OEM NGK copper spark plugs. Here is a link to a write-up done by an 07' WK owner, I think the process should be pretty similar for the WK2 HEMI.
(http://www.jeepgarage.org/f187/how-t...-7l-16730.html)

nek121328 11-19-2012 04:43 PM

Re: Hemi spark plugs
 
My dealer installed mine, so I'd say no.

nek121328 11-19-2012 04:44 PM

Re: Hemi spark plugs
 
Don't use a taper guage when gapping Iridium plugs. Use a tong type.

kkreit01 11-20-2012 10:53 AM

Re: Hemi spark plugs
 
If you buy Iridiums, you still have to change them per the manual -- as long as you are under warranty. Thus, you'll be wasting money. I'd stick with coppers also. Chrysler is silly like that, and there must be a reason. Neons ran best on coppers as well (had a 2nd gen back in the day).

ColdCase 11-20-2012 12:40 PM

Re: Hemi spark plugs
 
Yeah its something to do with the spark pattern and wear characteristics... I recall reading a good technical explanation awhile back. The V8 does not perform as well with the Iridium design. Std Copper is better.

nek121328 11-20-2012 02:26 PM

Re: Hemi spark plugs
 
If copper core plugs were better for the 5.7L, then why would Champion develop an Iridium replacement?

wjs81866 02-06-2013 05:16 PM

Re: Hemi spark plugs
 
I changed mine with the plugs called out in the service manual; too many threads warning against using other plugs. Actually it was pretty easy. Lowering the Quadra- Lift to Park made it easier to get to the rear plugs. I was worried I might not get to some but it went well. Wife's is up next and I expect it to go a little faster this time.

By the way the plugs were changed at 31,000 and they still looked pretty good.
30K it is....I would rather stick to the recommended interval than try and save a few bucks.

Matterhorn 02-16-2013 11:39 PM

Quote:

Originally Posted by nek121328 (Post 713566)
If copper core plugs were better for the 5.7L, then why would Champion develop an Iridium replacement?

To make money.

BuckeyeSRT 02-17-2013 10:36 AM

Re: Hemi spark plugs
 
Who makes the plugs for Mopar? What is the plug product number(what plug is it)?


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