Mopar 100k interval Hemi Spark Plugs - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WK Grand Cherokee & XK Commander Forum > Mopar 100k interval Hemi Spark Plugs

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineRockridge 4WD IS Taking Zone Offroad Suspension Lift Kits Rough Country Jeep Suspension Deals at Rockridge 4WD!

Reply
Unread 08-25-2013, 04:28 PM   #1
10Xk
Registered User
2010 XK Commander 
 
Join Date: Apr 2012
Location: , USA
Posts: 497
2014 GC 5.7l owners manual states 100k change interval of spark plugs (pn SP149212AC

Can the older 5.7l use these spark plugs?

http://www.mopar.com/part/SP149212AC...2330250&b=jeep

http://www.jeep.com/download/pdf/man...on.y=4#page622

10Xk is offline   Reply With Quote
Unread 08-25-2013, 04:44 PM   #2
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 7,578
No since your engine is not spec'd for those plugs.
__________________
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
tjkj2002 is offline   Reply With Quote
Unread 08-25-2013, 05:06 PM   #3
10Xk
Registered User
2010 XK Commander 
 
Join Date: Apr 2012
Location: , USA
Posts: 497
Quote:
Originally Posted by tjkj2002
No since your engine is not spec'd for those plugs.
You know this for a fact, have you done it?
10Xk is offline   Reply With Quote
Unread 08-25-2013, 05:29 PM   #4
modernblueWK
Registered User
 
Join Date: Jan 2010
Location: Gunnison, CO
Posts: 1,671
The only difference i can think of that would matter would be coil pack design changes.
__________________
2008 wk 4.7 v8 Laredo X QTII - 245/70-17 at2 - Magnflow 13742
Blue WK club #4
2013 HEMI Durango Awd Crew. All stock
modernblueWK is offline   Reply With Quote
Unread 08-25-2013, 07:02 PM   #5
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 7,578
Quote:
Originally Posted by 10Xk View Post
You know this for a fact, have you done it?
I get the pleasure of changing the wrong plugs out of older HEMI's when the owners just installed the wrong plugs and start having misfire issues,happens at least once a week be it the 5.7/4.7/3.7's.Talk about some pissed off people when they get to pay for a plug change twice and 32 spark plugs.


It's so easy to change your plugs,why not use the correct plugs and change them every 30K?Those vehicles with 100k plug changes are mostly due to engine design making it a 3-4 hour job to change there plugs and others that are easy(GM V8's and such) have a habit of getting the wires/coil boots glued/melted on the plugs requiring more parts,more $$$ which makes people more mad.
__________________
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
tjkj2002 is offline   Reply With Quote
Unread 08-25-2013, 07:09 PM   #6
Walt
Registered User
2008 WK 
 
Join Date: Oct 2009
Location: Midland, MI
Posts: 1,519
Quote:
Originally Posted by 10Xk View Post
2014 GC 5.7l owners manual states 100k change interval of spark plugs (pn SP149212AC

Can the older 5.7l use these spark plugs?

http://www.mopar.com/part/SP149212AC...2330250&b=jeep

http://www.jeep.com/download/pdf/man...on.y=4#page622
The '05-'08 5.7L HEMI's use Champion 570 or OEM SPRE14MCC4 copper core plugs (think they have nickel tips). The other plugs likely have platinum tips and/or electrodes. Many have reported stalling after 5K miles on platinum-tipped plugs. You'll note the different plug numbers in the link below.

My '00 & '03 WJ's with 4.0L I-6 engine used 100K mile plugs. I was really surprised that my 5.7L HEMI does not.

You can look here for comparative part numbers: http://www.wkjeeps.com/wk_sparkplugs.htm

BTW: If you use Champion 570's, make sure they have dark coated center upper electrode connections. Silver-colored ones are not correct. There is a Star Case on them.
__________________
HEMI CLUB MEMBER #45; SILVER WK CLUB MEMBER #13
'08 WK GC Limited. 5.7L HEMI. Quadra-Trac II. Bright Silver Metallic. Class IV hitch.
Michelin LTX M/S tires. Fumoto oil drain valve. Billet Technology oil catch can.
Walt is offline   Reply With Quote
Unread 08-25-2013, 07:51 PM   #7
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 7,578
Quote:
Originally Posted by Walt View Post
The '05-'08 5.7L HEMI's use Champion 570 or OEM SPRE14MCC4 copper core plugs (think they have nickel tips). The other plugs likely have platinum tips and/or electrodes. Many have reported stalling after 5K miles on platinum-tipped plugs. You'll note the different plug numbers in the link below.

My '00 & '03 WJ's with 4.0L I-6 engine used 100K mile plugs. I was really surprised that my 5.7L HEMI does not.

You can look here for comparative part numbers: http://www.wkjeeps.com/wk_sparkplugs.htm

BTW: If you use Champion 570's, make sure they have dark coated center upper electrode connections. Silver-colored ones are not correct. There is a Star Case on them.
no 4.0 I6 came with 100k plugs from teh factory,all came with Champion copper plugs,change every 30k.
__________________
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
tjkj2002 is offline   Reply With Quote
Unread 08-28-2013, 06:51 AM   #8
Walt
Registered User
2008 WK 
 
Join Date: Oct 2009
Location: Midland, MI
Posts: 1,519
Quote:
Originally Posted by tjkj2002 View Post
no 4.0 I6 came with 100k plugs from teh factory,all came with Champion copper plugs,change every 30k.
Sorry, but you are incorrect on this one.

I took delivery new on both of my WJ's and the dealer showed me the MOPAR advisory for the spark plugs installed in my engines. (I questioned his statement since it was contrary to the owner's manual and the MOPAR WJ shop manual). Must have been a running change. It would have been to the dealer's immediate financial advantage to change the plugs and charge me, but he didn't. To their credit, they were straightforward, honest, and substantiated their assertion with MOPAR documentation (I don't recall if it was a service bulletin, a TSB, or whatever...).
Since I didn't get to 100k miles on either the '00 or '03, I do not know how the spark plugs looked......however, both I-6 4.0L engines ran just fine for the 3+ yrs that I drove each of them.

The '97 Grand Cherokee I-6 4.0L engine was different. It did have 30K spark plugs and that is the regimen I followed.
__________________
HEMI CLUB MEMBER #45; SILVER WK CLUB MEMBER #13
'08 WK GC Limited. 5.7L HEMI. Quadra-Trac II. Bright Silver Metallic. Class IV hitch.
Michelin LTX M/S tires. Fumoto oil drain valve. Billet Technology oil catch can.
Walt is offline   Reply With Quote
Unread 08-28-2013, 06:56 AM   #9
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 7,578
Quote:
Originally Posted by Walt View Post
Sorry, but you are incorrect on this one.

I took delivery new on both of my WJ's and the dealer showed me the MOPAR advisory for the spark plugs installed in my engines. (I questioned his statement since it was contrary to the owner's manual and the MOPAR WJ shop manual). Must have been a running change. It would have been to the dealer's immediate financial advantage to change the plugs and charge me, but he didn't. To their credit, they were straightforward, honest, and substantiated their assertion with MOPAR documentation (I don't recall if it was a service bulletin, a TSB, or whatever...).
Since I didn't get to 100k miles on either the '00 or '03, I do not know how the spark plugs looked......however, both I-6 4.0L engines ran just fine for the 3+ yrs that I drove each of them.

The '97 Grand Cherokee I-6 4.0L engine was different. It did have 30K spark plugs and that is the regimen I followed.
Not for the 4.0,now the 4.7 HO yes but not the 4.0.Platinum or iridum plugs and the 4.0 ignition system in a WJ don't mix well since it's a waste spark system.
__________________
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
tjkj2002 is offline   Reply With Quote
Unread 08-28-2013, 10:19 AM   #10
90grandoneer
Registered User
2006 WK 
 
Join Date: Apr 2008
Location: City of Trees
Posts: 1,588
Quote:
Originally Posted by tjkj2002 View Post
i get the pleasure of changing the wrong plugs out of older hemi's when the owners just installed the wrong plugs and start having misfire issues,happens at least once a week be it the 5.7/4.7/3.7's.talk about some pissed off people when they get to pay for a plug change twice and 32 spark plugs.


It's so easy to change your plugs,why not use the correct plugs and change them every 30k?those vehicles with 100k plug changes are mostly due to engine design making it a 3-4 hour job to change there plugs and others that are easy(gm v8's and such) have a habit of getting the wires/coil boots glued/melted on the plugs requiring more parts,more $$$ which makes people more mad.
amen!!!
__________________
06 GCO, Dk Khaki, QDII, Flshing Hi 3rd Bk Lt, MDS "ON" Lt, Airtab Vortex Gens, Debadged, Fumoto Drain Valve, BT Catch Can, Chopped EGR Tube, SRT8 CAI, K&N Filter, Sonnax Trans Line Press Booster, SC Tuner W/Adv Trans Tune App, DS Tuner, Cust tubular hdrs w/3 in Magnaflow/Xlerator AP Exh Sys, Bilsteins, SRT Springs/Sways, Cust Eng Cvr, SRT8 frt/rear bumpers, FRI Sidewinder Cam/6.1 valvetrain, SLP 25% UD Pulley, BBK true 90mm T-Body, SOS Ign Coils w/.060 spark plug gaps, SRT Reps with 265/45&295/40X20's.
90grandoneer is offline   Reply With Quote
Unread 08-29-2013, 05:21 AM   #11
Walt
Registered User
2008 WK 
 
Join Date: Oct 2009
Location: Midland, MI
Posts: 1,519
Quote:
Originally Posted by tjkj2002 View Post
Not for the 4.0,now the 4.7 HO yes but not the 4.0.Platinum or iridum plugs and the 4.0 ignition system in a WJ don't mix well since it's a waste spark system.

WTFO. Maybe you would like to report the rest of the conversation I had with the (now defunct) dealer's service department since you were apparently there (13 years ago).

You win; yours is bigger.
__________________
HEMI CLUB MEMBER #45; SILVER WK CLUB MEMBER #13
'08 WK GC Limited. 5.7L HEMI. Quadra-Trac II. Bright Silver Metallic. Class IV hitch.
Michelin LTX M/S tires. Fumoto oil drain valve. Billet Technology oil catch can.
Walt is offline   Reply With Quote
Unread 08-29-2013, 04:54 PM   #12
10Xk
Registered User
2010 XK Commander 
 
Join Date: Apr 2012
Location: , USA
Posts: 497
Quote:
Originally Posted by Walt

WTFO. Maybe you would like to report the rest of the conversation I had with the (now defunct) dealer's service department since you were apparently there (13 years ago).

You win; yours is bigger.
Good call!
10Xk is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.