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Old 04-24-2016, 09:46 AM
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Changed Spark Plugs Yesterday......easy

At 37,000 miles I thought I had better "git 'r done". I was a bit leary because the hemi in a Grand Cherokee did not seem to leave a lot of room to work.....I WAS WRONG.

I bought mopar ngk plugs from amazon for $55. I worked on the passanger side first, and it was a breeze. After I removed the engine cover, I used a 10 mm socket to remove all 4 coil packs. Then a 5/8 socket to spin out the plugs. I gapped the new plugs at 44 and applied just a tad of anti sieze. Torqued them to 155 inch pounds or 13 foot pounds, and put dilectric grease on the end of the plug boots.

The only issue I had on the drivers side was an a/c line that interferred just a little and I removed a hose that went from the air box to the intake....just pulled right off.

The whole job took an hour and 20 minutes....never did such an easy plug change.

My last Ford 5.4L took a day and a half as most of the plugs broke in half ....what a pita...glad I bought a Jeep........

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  #2  
Old 04-24-2016, 09:53 AM
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Re: Changed Spark Plugs Yesterday......easy

Glad they upped the intervals to 100k for the V8. That short of a plug change interval is ridiculous these days. Does that bad boy still use 16 plugs?
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Old 04-24-2016, 10:09 AM
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Re: Changed Spark Plugs Yesterday......easy

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
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Old 04-24-2016, 11:23 AM
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Re: Changed Spark Plugs Yesterday......easy

Glad to hear it's easy. Without ever having done a Heni plug change I too would have thought it would be very difficult.
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Old 04-24-2016, 11:30 AM
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Re: Changed Spark Plugs Yesterday......easy

that plug design on the ford 5.4 is a pain...
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Old 04-24-2016, 04:24 PM
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Re: Changed Spark Plugs Yesterday......easy

Quote:
Originally Posted by zogg View Post
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.
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Old 04-28-2016, 06:52 AM
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Quote:
Originally Posted by Raptor View Post

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.
Holy crap, those Molar ones are expensive. Lowest I seen was $145 for 16 of em. But if I really can put them in my '12 and they'll last 100k, it might be worth it time wise. Money wise, I think I can get 3 sets of the cheapo stock ones for under that.
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Old 04-28-2016, 03:47 PM
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Re: Changed Spark Plugs Yesterday......easy

I wonder what the police package uses on the hemi my son switch to platinums 2 years back on his hemi charger never a lssue I can't see police doing plugs every 30 k
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Old 04-28-2016, 07:34 PM
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Re: Changed Spark Plugs Yesterday......easy

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Originally Posted by dallas1 View Post
I wonder what the police package uses on the hemi my son switch to platinums 2 years back on his hemi charger never a lssue I can't see police doing plugs every 30 k
They don't.....they use the OEM 100k Mile Iridium NGK plugs.
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