Originally Posted by zogg
Yep....16 spark plugs. Otherwise it would gave been a 45 minute job!
I thought about using platinum or iridium plugs but too many folks said they had issues with them.
Every 30,000 is unusual today but it is a pretty simple job.
I should say the jeep does run a little smoother and seems to start just a tad quicker. The old plugs really looked good when I pulled them
People have had issues with platinum plugs
in the Hemi's but the Iridium plugs are OEM Chrysler parts, in fact the only NGK application for the Mopar Iridium plugs is for the Mopar 5.7L Hemi engine. If your going to change 16 plugs in the Hemi, why not do it and not worry about it for another 100K miles?
Mopar/Chrysler part # SP-143877AA MSRP $17.25 (Local Mopar Dealer)
NGK part # 1LZFR5E-11
These plugs were developed by Mopar to be used in their "Police Package" 5.7L hemi engines. It's a Iridium plug made by NGK
good for a 100K mile service life, made specifically for Chyslers 5.7L Hemi engine. This is the new 100K mile sparkplug Jeep is using in all 2014 WK2 5.7L hemi engines and it can be used in earlier 2011~2013 WK2's.