Mopar 100k interval Hemi Spark Plugs - JeepForum.com

 
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post #1 of 12 Old 08-25-2013, 04:28 PM Thread Starter
10Xk
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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

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post #2 of 12 Old 08-25-2013, 04:44 PM
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No since your engine is not spec'd for those plugs.

'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
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post #3 of 12 Old 08-25-2013, 05:06 PM Thread Starter
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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?
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post #4 of 12 Old 08-25-2013, 05:29 PM
modernblueWK
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The only difference i can think of that would matter would be coil pack design changes.

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post #5 of 12 Old 08-25-2013, 07:02 PM
tjkj2002
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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
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post #6 of 12 Old 08-25-2013, 07:09 PM
Walt
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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.

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post #7 of 12 Old 08-25-2013, 07:51 PM
tjkj2002
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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
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post #8 of 12 Old 08-28-2013, 06:51 AM
Walt
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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.

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Michelin LTX M/S tires. Fumoto oil drain valve. Billet Technology oil catch can.
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post #9 of 12 Old 08-28-2013, 06:56 AM
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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
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post #10 of 12 Old 08-28-2013, 10:19 AM
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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!!!

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post #11 of 12 Old 08-29-2013, 05:21 AM
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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.
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post #12 of 12 Old 08-29-2013, 04:54 PM Thread Starter
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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!
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