Spark plugs worth it? - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Engine Performance/Intakes/Exhausts

Reply
 
Thread Tools Display Modes
 
  #1  
Old 09-05-2016, 06:43 PM
Member
My Jeep: 2012 3.6L WK2
 
Join Date: Jun 2016
Posts: 104
Thanks: 3
Thanked 7 Times in 6 Posts
Rep Power: 14773
brandondmorris has a reputation beyond reputebrandondmorris has a reputation beyond reputebrandondmorris has a reputation beyond reputebrandondmorris has a reputation beyond reputebrandondmorris has a reputation beyond reputebrandondmorris has a reputation beyond reputebrandondmorris has a reputation beyond reputebrandondmorris has a reputation beyond reputebrandondmorris has a reputation beyond reputebrandondmorris has a reputation beyond reputebrandondmorris has a reputation beyond repute
Spark plugs worth it?

I read in an owners manual or suggested maintenance guide that the Pentastar 3.6L only needs plugs changed ever 100k miles. I was considering doing this around the time of my next oil change, where ill be at about 48k miles.

Is this completely pointless or will adding new plugs bring some pep? Not looking for 100HP change, just if this will help or pointless?

If so, what do you guys recommend? I see the E3 plugs advertised a lot.

Thanks!

Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 09-05-2016, 09:37 PM
Mrcleanohio's Avatar
Member
My Jeep: 2016 5.7L WK2
 
Join Date: Sep 2016
Location: Central Ohio
Posts: 22
Thanks: 3
Thanked 3 Times in 3 Posts
Rep Power: 316
Mrcleanohio is on a distinguished road
Re: Spark plugs worth it?

E3 plugs won't add anything. Iridium plugs are your best bet. They last 100K miles, and are better than factory. An Afe Sprint Booster will really liven up your engine. It's not so much of a power adder, but really pep up the throttle response and stops the lag when you hit the gas. And not just at WOT. A new air filter can work some wonders too. cold air intake with a dry-type filter will add a couple HP, and boost fuel mileage just a little bit. Going to full synthetic oil will also add a little efficiency, as it reduces a little more friction, last 5-10K miles, and can boost mileage slightly too. Cheapest, easiest, quickest fixes to pep up a motor, and won't break the bank
Reply With Quote
  #3  
Old 09-06-2016, 02:56 PM
Ratchet's Avatar
Member
My Jeep: 2014 5.7L WK2
 
Join Date: May 2011
Location: Wilson, NC
Posts: 577
Thanks: 22
Thanked 33 Times in 32 Posts
Rep Power: 6666
Ratchet has a reputation beyond reputeRatchet has a reputation beyond reputeRatchet has a reputation beyond reputeRatchet has a reputation beyond reputeRatchet has a reputation beyond reputeRatchet has a reputation beyond reputeRatchet has a reputation beyond reputeRatchet has a reputation beyond reputeRatchet has a reputation beyond reputeRatchet has a reputation beyond reputeRatchet has a reputation beyond repute
Re: Spark plugs worth it?

Honestly, 48K is a bit early to replace the OEM plugs. I'd stick with the OEM plugs.
__________________
2014 WK2 Overland - Billet Silver
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 09-07-2016, 09:25 AM
Jeep_addicted's Avatar
Premium Member
My Jeep: 2012 3.6L WK2
 
Join Date: Nov 2011
Location: St. Thomas US. Virgin islands
Posts: 1,418
Thanks: 24
Thanked 138 Times in 102 Posts
Rep Power: 1333388
Jeep_addicted has a reputation beyond reputeJeep_addicted has a reputation beyond reputeJeep_addicted has a reputation beyond reputeJeep_addicted has a reputation beyond reputeJeep_addicted has a reputation beyond reputeJeep_addicted has a reputation beyond reputeJeep_addicted has a reputation beyond reputeJeep_addicted has a reputation beyond reputeJeep_addicted has a reputation beyond reputeJeep_addicted has a reputation beyond reputeJeep_addicted has a reputation beyond repute
Garage
Re: Spark plugs worth it?

The OEM Plugs are already iridium plugs.


The reason why the plug change interval is so high is because it is such a pain in the ass to remove the upper intake manifold.


I was told by a tech you may have to remove the cowl area so you can access the rear bolts on the upper intake manifold.


Newer plugs will always maintain the performance you have and if you had to remove the upper intake manifold for some other reason that would be a good time to freshen the plugs.

Putting in fresh plugs at 50 k won't hurt but I would not put anything in but iridium plugs that rated for the 3.6l.


Iridium plugs and sythetic oil made a huge difference to my GF 2003 corolla, the engine has more torque now. It drives like a different car.

More and more you see cars that have high plug change intervals and they have OEM iridium plugs.
__________________
  • '12 Laredo X V6 Deep Cherry Dark/Mid Greystone, QT1
  • Outside: colormatched Altitude Grille, S Limited rear valance, Rear chrome trim Sharkfin, 20% tint, RFUK (built my own)
  • Inside: Alcantara steering wheel/shift knob,SRT dash trim, illuminated front scuff plates, stainless rear scuff plates, bright pedals, F/R footwell lights
  • Performance: OEM dual exhaust conversion, HD brakes, E-code SRT-8 projectors, JWS fogs
Reply With Quote
  #5  
Old 09-07-2016, 07:05 PM
Michael Plummer's Avatar
Member
My Jeep: 2014 5.7L WK2
 
Join Date: Mar 2016
Location: Massachusetts
Posts: 240
Thanks: 29
Thanked 126 Times in 71 Posts
Rep Power: 16312
Michael Plummer has a reputation beyond reputeMichael Plummer has a reputation beyond reputeMichael Plummer has a reputation beyond reputeMichael Plummer has a reputation beyond reputeMichael Plummer has a reputation beyond reputeMichael Plummer has a reputation beyond reputeMichael Plummer has a reputation beyond reputeMichael Plummer has a reputation beyond reputeMichael Plummer has a reputation beyond reputeMichael Plummer has a reputation beyond reputeMichael Plummer has a reputation beyond repute
Re: Spark plugs worth it?

If your vehicle doesn't have an spark related issues with (Hard starting, pinging, poor fuel economy and reduced performance) I would leave them alone.

FYI,
Iridium spark plugs: Are high-performing plugs, they offer better durability, ignite faster and last up to four times longer than copper spark plugs.

I hope this helps
Michael Plummer
__________________
2014 Jeep CG 5.7L Overland: 304rwhp & 337rwtq & 14.58@95.18 (K&N CAI, Diablosport inTune, Pedal Commander)
1994 Mustang Saleen: 890rwhp & 771rwtq

Reply With Quote
  #6  
Old 09-07-2016, 07:10 PM
silvermax04's Avatar
Senior Member
My Jeep: 2014 5.7L WK2
 
Join Date: Feb 2013
Posts: 3,542
Thanks: 285
Thanked 624 Times in 485 Posts
Rep Power: 30674
silvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond repute
Re: Spark plugs worth it?

I have changed 100k plugs at 70-80k before and it is a complete waste they were in near perfect condition and would easily go way beyond 100k. 100k means 100k just do them then.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to change the spark plugs on a 4.7 V8 WK Grand Cherokee or Commander Scottina06 Technical Tips/DIY/How-To 31 03-20-2013 09:41 PM
1999 WJ Spark Plugs Andrew Engine Performance/Intake/Exhaust 25 07-21-2012 08:19 AM
Spark plugs!!!! jeeppro Grand Cherokee - WK 58 06-07-2011 02:00 PM
Spark plugs? mzh29 Performance Modifications 9 09-22-2009 06:03 PM
Has Anyone Ever Used Pulstar Spark Plugs? jeeppro Performance Modifications 16 06-02-2009 08:32 PM

» Premium Vendor Showcase
Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 05:57 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.