RE: Spark Plugs
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RE: Spark Plugs - 12/18/2007 8:19:59 PM
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BACKnBLACK
Posts: 163
Joined: 6/8/2006
From: Budd Lake, NJ
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once more questions...how many ft-lbs. do these need to be torqued when installed?
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New 2007 QC SLT-4.7L V8-Sirius Satellite-iPod 30GB-new sig pic to follow soon
The Dak
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RE: Spark Plugs - 12/19/2007 2:39:24 AM
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graythang
Posts: 615
Joined: 7/29/2006
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20 foot-pounds. Stick with the Autolites 3923s my guess they will carbon up faster running one temperature colder from what I’ve been reading so check them every, say 15k. My HO came with plats. from the factory but went to the copper 3923s.
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RE: Spark Plugs - 12/19/2007 7:22:15 AM
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ChadJK
Posts: 36
Joined: 12/1/2007
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quote:
ORIGINAL: BACKnBLACK
so even though my engine is not really modified except for the K&N 63 Series, I should stick with the 3923's? My other question would be, how often do you have to change them? The stock ones are due since I have 31K. Will the 3923's (or the 5224's) go quicker as indicated earlier in this forum or will they last 30K? Taking them back to the store is easy, I just want to get the best ones for my truck. So, please give me some feedback.
Go ahead and use the 3923s, everyone around here seems to have excellent results with them.
I've always been told your spark plugs get changed every 12 months or 12,000 miles (whichever comes first) and you should remove them every oil change and check for deposits/damage, re-gap, and clean them. At least, that's what my dad's generation thinks. Newer cars seem to have much bigger intervals between scheduled maintenance than those of the 60s and 70s did and in newer cars they're just too hard to get at to inspect every oil change. Basic copper core spark plugs are pretty cheap, so changing them every 12,000 miles isn't much of a burden.
< Message edited by ChadJK -- 12/20/2007 6:07:53 AM >
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RE: Spark Plugs - 12/20/2007 3:49:48 AM
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BACKnBLACK
Posts: 163
Joined: 6/8/2006
From: Budd Lake, NJ
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thanks for the feeback. My last two vehicles (Avenger ES 2.5L V6 and Stratus R/T Sedan 2.7L V6) had platinum and were 100K plugs. So, the copper plugs are a new concept to me. I appreciate the help!
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Todd
New 2007 QC SLT-4.7L V8-Sirius Satellite-iPod 30GB-new sig pic to follow soon
The Dak
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RE: Spark Plugs - 12/24/2007 2:03:59 PM
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graythang
Posts: 615
Joined: 7/29/2006
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Well I guess Dodge either read my strings or got a bunch of text on why does my hood sticker have a differemnt plug printed than whats in the engine. Look what I got in the mail today.
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Graythang II
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RE: Spark Plugs - 12/27/2007 4:21:21 PM
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kzguns
Posts: 29
Joined: 11/20/2007
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Anyone get bad mpg from these plugs? ever since i changed them my avg. dropped from 18-19 to 13-15. I think i may switch back to the factory plug.
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RE: Spark Plugs - 12/27/2007 4:24:52 PM
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Altair
DodgeForum Moderator
Posts: 4639
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I've been getting same to slightly better mileage since I switched, are you sure you gapped them properly?
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RE: Spark Plugs - 12/27/2007 4:51:04 PM
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graythang
Posts: 615
Joined: 7/29/2006
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Nope, I get about the same or just a few tenths better than before. The engine idles slightly smoother but I have noticed that the acceleration is much smoother with not bogs or hesitations as before. I gaped mine at 0.38 since the factory plugs where gaped at 0.36 to 0.38 but NOT 0.40. As you can see in my message above they printed the wrong information on the factory hood sticker about the plugs for the HO engine and sent me a revised hood sticker. So far, I like the 3923s.
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Graythang II
Sleeps a necessary waste of time.
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RE: Spark Plugs - 12/27/2007 5:54:43 PM
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Jr. Mechanic
Posts: 4216
Joined: 1/10/2007
From: Lima, Ohio
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quote:
ORIGINAL: kzguns
Anyone get bad mpg from these plugs? ever since i changed them my avg. dropped from 18-19 to 13-15. I think i may switch back to the factory plug.
Sounds like you are getting about right now, if you were getting 18-19 before, are you sure you were driving a 3rd gen Dakota??? 
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RE: Spark Plugs - 12/27/2007 5:55:48 PM
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VA Dakota
Posts: 42
Joined: 12/11/2007
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I'm Back!!!!! I hope everyone had a wonderful holiday..
Another question AGAIN about plugs....LOL
For those that have the 4.7L HO engine. I do not think running 3923's is a good idea....
from the factory the plugs are Champions - RC7PYCB4 correct???? the Autolite replacement plug should be a 3922.. Yes, isn't
this plug colder than the 3923'S
http://www.autolite.com/pdf/SparkPlugNumberingSystem.pdf
Autolite plug numbers ending in a 4 indicate that the plugs are the normal heat range. As this last digit decreases, the heat range becomes correspondingly one range colder.
So, is the 3923 a hotter plug???? and I do not think you want to use a 3923 in a 4.7LHO engine..
Using a 3923 plug in a non 4.7L HO engine is fine, one stage colder than a 5224 or 3924
some one correct me if I'm wrong !!!!!
< Message edited by VA Dakota -- 12/27/2007 6:01:11 PM >
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RE: Spark Plugs - 12/27/2007 6:20:01 PM
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superdak05
Posts: 2651
Joined: 3/12/2006
From: ct.
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the 3922 plugs should be used with nitrous or boosted applications. these plugs are two steps cooler than the factory champions. the normal 3923 plugs will work fine in the ho 4.7. have been running the 3923 plugs with my cam and pcm upgrades without any problem
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