You shouldn't have to relearn. I have only had to relearn after disconnecting the battery.

 

How many miles are on the car and what was the condition of the plugs you removed?

 

Great question!

385000 miles

The plugs were not that bad at all. Most of them were 0.048 - 0.050 and a couple were 0.052. On plug had oil on the threads from a light seep from the plug tube seals but from the looks of the oil it has been there for a long time and there was very very little oil on the top portion of the threads.

Not bad at all really. The idle sure has smoothed out.

Man, that throttle body needs to be cleaned at least every 20,000miles.

 

what kind of plugs do u use?? stock from Chrysler, or upgraded from an auto store?? and what is the socket size, im changing my plugs this week.

 

Champion Standard Copper Core Plugs from an auto parts store, don't buy them from the dealer.

Socket is a standard size spark plug socket with the rubber insert.

 

Changed my plugs about a month ago. It was so easy a caveman can do it. lol. I replaced mine with bosch platinum 4's. Nice plug. 4 times the spark. Only thing is that the plug is 6 bucks a pop, but well worth it.

 

:scared: those caused havoc in my eclipse v6 ricer as soon as i put them in! but that was another story..and it was a mitsubishi.

so are they running good your car? is the idle smoother?

 

lol, oh ****, a small typo there.

38500miles......

 

Ah, much better. 38.5k makes MUCH MUCH more sense Congrats on the easy install!

 

Why did you change your spark plugs so soon? I didn't think they needed changing that fast?

 

Why did you change your spark plugs so soon? I didn't think they needed changing that fast?

Just on the 5.7. They come with 16 OEM single electrodes and are not indexed (electrodes pointing away from the exhaust valves). Chrysler advises changing the plugs at 30,000 miles.

The 6.1 engine uses a dual electrode plug, so the frequency of change is much longer.

 

Good info. I was going to ask if you had a CAI and if that was causing the gunk but it looks like the stocker has this problem too.

 

Yea, don't believe the people saying it is the CAI causing it because it isn't. Filter oil doesn't cause those kind of deposits anyways especially only on the back side of the throttlebody.

It is the PCV blowby causing it. Might be a good reason to put a PCV catch can on this engine and take that stuff out before it gets a chance to go back into the engine though.:fing02:

 

The one thing I found out of that 14 ft lbs is not very much torque at all.

Weird feeling not torquing them down like i have done with most plugs.

 

Great info guys I am going to replace mine this weekend...

 

Plugs

I bought a set of Champions at Pep Boys a few weeks ago for $1ea. I just changed plugs in my other car, an 07 Mustang GT, and the lowest price Champion plugs (platinum) for the Mustang were $12.95 ea. NAPA's price was $20 ea. The metal body of the OE plug is a 2-piece design, and the lower portion can sieze in the head due to carbon build-up and separate when the plug is removed. I didn't have that problem, but when it occurs, the stuck piece has to be removed with a $200 extractor, or worse case, the head may have to be removed. Champion is the only source for a plug with a 1-piece body design, and the distributers are gouging us as a result. The OE plugs are 100,000 mile platinum, but everyone who knows about this is changing early to avoid disaster later.

 

hey northern, what store did you get yours from, I think its time I replaced mine. Do they still have a sale going on? Which plug should I go with for the 5.7?

 

Go with the Champion, as the manual states. DO NOT USE PLATINUM. There is quite a few posts about this matter, so you should probably do a search. From what I remember, the platinum, while they do last longer, do not conduct the same amount of juice the copper (Champion) do. That's why our engines need the Champion and cannot use the platinum long-lasting ones like the other Chrysler cars. They cost alot less, but need to be changed more often, so it sort of balances out in the end.

But do the search and read the specifics.

 

what about the iridiums? are we able to use those at all?

 

Here's a link concerning my question about plugs a while back.

http://www.300cforums.com/forums/general-discussion/44177-there-better-spark-plugs-out-there.html

Iridiums are a no-no as well. I haven't found the link yet in the search feature, but there is plenty of material on this topic.

 

thanks for the infor moparcanuck, your always a great help

 

Imo

It should be noted that many members run platinum and iridium plugs in their 5.7 Hemis.

They run fine. With no problems. Seems ok seeing as the 6.1 comes with them from the factory and asks for service at 100,000 miles.

The only reason there's 16 copper plugs in the car from the factory is price. They're cheap.

The only reason to use a different plug would be to get longer plug life, but due to our "waste spark" ignition that reverses polarity you'll need a double platinum or iridium plug. These are expensive, but some people don't want to change their plugs every 30K!

 

The 5.7 and the 6.1 both use 16 plugs, but the SRT puts in platinum and the 5.7 copper. Why would they consider price for one and not the other? Could it be that it is the MDS requires the copper (el-cheap-o) plugs for a particular reason? I would be interested in learning if the 5.7 in other Chrysler applications calls for copper plugs as well.

 

volume

The 5.7 and the 6.1 both use 16 plugs, but the SRT puts in platinum and the 5.7 copper. Why would they consider price for one and not the other? Could it be that it is the MDS requires the copper (el-cheap-o) plugs for a particular reason? I would be interested in learning if the 5.7 in other Chrysler applications calls for copper plugs as well.

The SRT division is allowed much more flexibility as their cars are sold at premium prices and are way more profitable to Chrysler. The regular Hemi is a very large volume piece and as such is subject to more cost restraints. The cost difference is quite considerable.

I just watched a 5.7 Charger R/T owner putting in new "high end" plugs and they run just fine. No problems at all. MDS is unaffected.

 

yes that was clarified in a later post. It was 38500

 

Thanks, don't know how I missed that , sorry.

 

Do we have an EGR in our cars?

 

Yes, the 5.7 has an EGR which runs into the manifold right behind the throttle body. Not sure if the 6.1 have one (don't think so, but the SRT owners would know for sure).

What difference would that make?

 

My 300 just crossed 30,000 mi. so I replaced the plugs...Champions $1.39 each. Put anti seize on them. My throttle body was fairly clean but wiped the flapper with cleaner. Runs great! The gaps had only opened a few thousandths so It could have run at least 10K more.....

 

Glad to hear it's an easy job. My 06 Magnum is coming up to 50,000K and my dealer service center has reminded me that I should book it in for that service. They're planning to charge me over $700 for changing the plugs, cleaning the throttle body, and decarbonization...whatever that may be. If anybody has any idea what they plan to decarbonize, I'd appreciate the insight.

Thanx

 

Awesome information!!! I am doing my mine as soon as I get off of work. I am going with Champions. Maybe some pictures, with a quick how-to will follow. Thanks for the info!!!