Champion plugs lasted a few months.
#1
Seasoned Member
Thread Starter
Join Date: Aug 2013
Location: Burien, wa
Posts: 251
Likes: 0
Received 0 Likes
on
0 Posts
Year: 88
Model: Cherokee
Engine: 4.o
Champion plugs lasted a few months.
Devolved a miss when cold and would go away when warmed. Now today it was there no matter what. Yanked a plug and the porcelain is gone. Clearly these plugs are not happy. What would be a good plug to replace these with? I have seen nothing but champion coppers on all the threads I've seen but I need something in a colder heat range I think.
I would have the child behind the local parts counter cross reference them but they always screw up.
I would have the child behind the local parts counter cross reference them but they always screw up.
#2
CF Veteran
those champions are the OEM and should be fine under normal circumstances, no need to find a different temp range etc. So, how are the other plugs? if more of them look like that it could be bad lot but otherwise it might be need to be chased whats caused that. Were they gapped to the correct distance before they were put in? Always needs to be checked.
but to answer your question otherwise: some forum members are happy with the NGK's, sure someone will chime in with the type/part #.
But once again, those OEM'S should last 30-50k.
edit: sorry, you have a Renix....so not sure if oem plugs were different in those. Cruiser54 will def know
but to answer your question otherwise: some forum members are happy with the NGK's, sure someone will chime in with the type/part #.
But once again, those OEM'S should last 30-50k.
edit: sorry, you have a Renix....so not sure if oem plugs were different in those. Cruiser54 will def know
#3
CF Veteran
Join Date: Apr 2009
Posts: 4,734
Likes: 0
Received 11 Likes
on
10 Posts
Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
Copper plugs normally don't last beyond 30,000 miles.
I detest Champions. I have had too many fail when not all that old, causing me to suspect anything but a new plug. Many frustrating hours spent checking everything else.
I use NGK Iridium plugs. Very happy with them.
I detest Champions. I have had too many fail when not all that old, causing me to suspect anything but a new plug. Many frustrating hours spent checking everything else.
I use NGK Iridium plugs. Very happy with them.
#4
CF Veteran
Join Date: Dec 2011
Location: Roanoke, VA
Posts: 1,050
Likes: 0
Received 2 Likes
on
1 Post
Year: 1990
Model: Cherokee
Engine: 4.0
Copper plugs normally don't last beyond 30,000 miles.
I detest Champions. I have had too many fail when not all that old, causing me to suspect anything but a new plug. Many frustrating hours spent checking everything else.
I use NGK Iridium plugs. Very happy with them.
I detest Champions. I have had too many fail when not all that old, causing me to suspect anything but a new plug. Many frustrating hours spent checking everything else.
I use NGK Iridium plugs. Very happy with them.
#5
Member
Join Date: Feb 2014
Location: north of the Rio Grande, south of the Red, east of the Pecos, west of the Sabine
Posts: 172
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Comanche
Engine: 4.0
Those plugs way too hot for the 4.0. Those are 2.5 plugs, and melted 2.5 plugs, at that. 4.0 calls for RC9YC as OEM plug.
Last edited by Bobolink; 07-31-2014 at 07:28 PM.
#6
Senior Member
Join Date: Nov 2012
Location: Harrisburg, Pennsylvania
Posts: 918
Likes: 0
Received 3 Likes
on
3 Posts
Year: 1995
Model: Cherokee
Engine: 4.0L HO
Originally Posted by Bobolink
Those plugs way too hot for the 4.0. Those are 2.5 plugs, and melted 2.5 plugs, at that. 4.0 calls for RC9YC as OEM plug.
#7
Seasoned Member
Thread Starter
Join Date: Aug 2013
Location: Burien, wa
Posts: 251
Likes: 0
Received 0 Likes
on
0 Posts
Year: 88
Model: Cherokee
Engine: 4.o
Yea I went to napa and got the rc9's. They where all gapped at .035. Only one cylinder was like this and the rest looked alright.
Trending Topics
#8
Senior Member
Join Date: Nov 2012
Location: Harrisburg, Pennsylvania
Posts: 918
Likes: 0
Received 3 Likes
on
3 Posts
Year: 1995
Model: Cherokee
Engine: 4.0L HO
Which cyl? I had something similar happen when I first replaced the plugs om my XJ (with champion RC12LYCs). I accidently tapped one on the head/plug tube for the #6 cyl. (this is an especially tricky one to guide in without hitting anything), a couple thousand miles later I noticed a slight miss, upon pulling the plugs I found the insulator on the #6 plug was cracked (not blown apart like yours though), it seems it doesn't take much to do damage. After replacing them with NGK I haven't had this re-occur, though I was much more carefull when installing the plugs as well.
#11
CF Veteran
Join Date: Sep 2011
Location: Riviera, Texas
Posts: 4,172
Likes: 0
Received 4 Likes
on
4 Posts
Year: 1998 Sport
Model: Cherokee
Engine: 4.0
It is very possible that yoy got a plug that had a crack in the porcelain. I have seen it before and it not that uncommon. I would replace the plugs and take a look at them after driving a bit and go from there. I bet it was a defective plug and has nothing to do with your Jeep.
Last edited by RTorrez1; 08-01-2014 at 12:40 PM.
#14
CF Veteran
Join Date: Sep 2011
Location: Riviera, Texas
Posts: 4,172
Likes: 0
Received 4 Likes
on
4 Posts
Year: 1998 Sport
Model: Cherokee
Engine: 4.0
The only reason I told him to recheck the plugs after running it for a few hundred mile it to make sure that it was a faulty plug and it's not another issue with the engine.
#15
CF Veteran
Join Date: Apr 2009
Posts: 4,734
Likes: 0
Received 11 Likes
on
10 Posts
Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
It was probably caused by either a persistent knock or ping in that cylinder, or extreme heat caused by a lean condition.
My Champion plugs just quit firing. The didn't break like that.
My Champion plugs just quit firing. The didn't break like that.