I'm putting new plugs in my hemi and have heard that you shouldn't use platinum plugs in this engine. Anybody have any insight?

10/24/2007 4:26:19 PM

Why are you replacing them?

10/24/2007 4:31:45 PM

^

10/24/2007 4:37:05 PM

MO POWA

10/24/2007 4:46:08 PM

60k service. manufacturer reccommends every 30k, but i felt they would be fine till 60k

10/24/2007 4:46:12 PM

are the current spark plugs iridium? if so, they should last longer than that.

10/24/2007 4:56:11 PM

If the manufacturer recommends 30k, they aren't platinum or irridium or anything more than a plain old resistor plug.

10/24/2007 5:25:49 PM

all 16 of them. is it a truck

[Edited on October 24, 2007 at 5:50 PM. Reason : ,]

10/24/2007 5:32:02 PM

^it's probably assumed to be, but no

ram, charger, grand cherokee, magnum, 300, and probably more

10/24/2007 5:49:30 PM

just get the Champion RE14MCC4 plugs.

10/24/2007 5:59:58 PM

i got platinums.$54 for all 16. it's a Ram 1500. Dodge put regular copper plugs in it from the factory and i read on a message board that the platinums will throw off codes. didn't make any sense though. I went to advance and the guy told me that the dealer usually gets platinum plugs from them.

that job is just too much work to do every 30K

10/24/2007 7:35:45 PM

the dealer does NOT go to advance for fucking plugs everytime they do a 60k service on those

if the factory didnt use them and people claim they throw codes then you should NOT have used them. thats just stupid.

10/24/2007 7:41:41 PM

You DO know why they use two plugs per cylinder, don't you?

The fucking things would never pass inspection with just one. CO and NOx levels too high because of shitty combustion chamber design (because they were more or less intent on using the hemi configuration with a few mods--the name says all, sells all). So another plug required for better, more uniform flamefront propagation.

10/24/2007 7:43:21 PM

^ha you googled good for you.

10/24/2007 7:58:39 PM

nosir. I kept up with a lot of the science and tech rags when the Hemi came out. Been knowing this for years.

A lot of engines with multiple plugs per cylinder do so because of the high amount of EGR occurring, or perhaps chamber shortcomings resulting from a particular valvetrain geometry (as in 2 valves per cylinder engines primarily).

[Edited on October 24, 2007 at 8:02 PM. Reason : blahblah]

10/24/2007 8:00:58 PM

some people have actually had classes on this stuff

10/24/2007 8:02:58 PM

the dealer's changing them, I just was'nt going to pay dealer price for plugs. if there is an issue they'll tell me before hand. From this point forward, I will consult optimusprimer on my maintenance decisions since he is apparently so emotional over my engine.

10/24/2007 8:39:02 PM

Quote :

"some people have actually had classes on this stuff"

Well, that too. But MAE 408 when I took it kinda sucked. I've done a lot of extracurricular reading over the years. You'd be amazed at the stuff on the 9th floor of DH Hill.

10/24/2007 8:53:29 PM

Quote :

"You'd be amazed at the stuff on the 9th floor of DH Hill."

Yeah especially if you went over it with a black light. OH you didnt mean on the actual floor, whoops.

10/24/2007 9:40:55 PM

Yeah, I think I probably contributed to that at least a couple of hundred times or so...

10/24/2007 9:49:48 PM

Dad: "Can you say Hemi, son?"

kid: "HEMI!"

10/24/2007 9:54:25 PM

Goddam marketing ploys.

Stupid yuppie consumers.

10/24/2007 9:57:07 PM

Dude, if it's stock just find out what the OEM plug is and go with it. The 3/8th of a HP you might gain is not going to help the seat dyno at all.

p.s.

Quote :

"the dealer does NOT go to advance for fucking plugs everytime they do a 60k service on those if the factory didnt use them and people claim they throw codes then you should NOT have used them. thats just stupid."

10/24/2007 9:57:51 PM

they will throw codes, misfire usually iirc.

if it does, you'll get a p03xx (xx denotes cylinder number) or a p0300 (multiple cylinder misfire).

i REALLY hope they're not bosch platinums, those are almost guaranteed problems. a lot of people have had success with the autolites, but still a few with issues.

[Edited on October 24, 2007 at 10:08 PM. Reason : .]

10/24/2007 9:59:19 PM

Yuppies buy BMW's not Dodge Rams.

10/25/2007 12:52:29 AM

yeah, pasty overweight "all-american" white dads with slightly irritating but cute wives buy Hemi-equipped vehicles

10/25/2007 1:09:14 AM

Quote :

"the dealer's changing them, I just was'nt going to pay dealer price for plugs. if there is an issue they'll tell me before hand"

you brought the part to the dealer and they are gonna put it on. never did that when i worked for ford. good luck

10/25/2007 1:53:39 AM

^^pasty? They're called rednecks. Don't be so bitter. We all know that big engine makes more horsepower than your wankel, and is probably more fuel efficient. Well at least it will run longer.

10/25/2007 9:30:57 AM

+1 for matt.i like thisguy

10/25/2007 9:54:52 AM

^^you sound like the type of guy that would have dual exhaust on your z71, because it sounds tuff.


gas mileage ftl.

[Edited on October 25, 2007 at 9:55 AM. Reason : damn will]

10/25/2007 9:55:08 AM

^^I don't like you so get off my nuts.

^Nah wasting money on exhaust for a truck is stupid. If it passes inspection leave it alone. I'd rather have 4 tanks of gas. But I do like the way v8s sound. I guess you don't, so that makes you a homo.

10/25/2007 2:05:25 PM

Quote :

"you sound like the type of guy that would have dual exhaust on your z71, because it sounds tuff."

he is, he is also the kinda guy who lets you tap his mom on the regular if you will be his e-friend.

10/25/2007 2:53:07 PM

has your wife left your fat ass yet?

10/25/2007 2:56:18 PM

^4x

Like my interest in women, I like a variety of exhaust notes, V8's included. just so you know.

10/25/2007 3:26:10 PM

damn boe chill out

10/25/2007 7:45:16 PM

no she hasn't but your mom left your fat ass pops for my nutz

10/25/2007 7:57:43 PM

Quote :

"^^pasty? They're called rednecks. Don't be so bitter. We all know that big engine makes more horsepower than your wankel, and is probably more fuel efficient. Well at least it will run longer. "

it was actually a veiled reference to the Durango commercial

10/25/2007 8:54:28 PM

^^Good tell him I said hey. Hey watch your dog though cause I will run him over.

10/25/2007 11:27:09 PM

i stuck with regular plugs. the dealer said that for some reason platinums and iridiums don't run very well in the hemi. it's still 345 HP with regular plugs.

10/25/2007 11:39:37 PM