Spark Plug replacement

mantis · Jun 22, 2019

Hello all,
anyone change their spark plugs yet? 16 of them I haven't gone under the hood to check on ease of install. I think it's a 30k change?

cambo · Jun 22, 2019

Mine were just changed 98K I watched a video on the ram truck didn't look to bad they needed some type of swivel to reach one in the back . I just had my mechanic do it.

Don Fox · Jun 22, 2019

IIRC, the 3.6 was a 100K plug from the start, and the 5.7 moved from 30K to 100 in 2014 at some point.

Don

mantis · Jun 22, 2019

Wow high mileage for spark plugs. 100k on plugs seems like they would be so worn out your fuel economy and power would be crushed. Are they some kind of special plug?

Don Fox · Jun 22, 2019

Mantis:
I believe they are iridium. The previous step up from the good, old copper plugs was platinum. I have seen iridium plugs go 100K, and have very little gap erosion. They cost a bit more, but the service interval is pleasantly extended. The long life plugs really shine in commercial applications where idle hours (not accounted for on the odo) can exceed the miles.

Don

67z28 · Jun 24, 2019

I changes the plugs in my '14 Durango 3.6L right at 100K and the plugs looked surprisingly good. I didn't really notice a change in performance afterwards.

onecrazyfoo4u · Jun 24, 2019

Yep, iridium plugs easily go 100k. I changed them at 100k on my 3.6l dodge journey cause mpg had started to decline 1-2mpg on average, right about 95k miles. The new plugs picked it back up to normal.

And 16 spark plugs???

DuRonbo · Jun 24, 2019

Yep......16 plugs for the 5.7L Hemi.

onecrazyfoo4u · Jun 24, 2019

I guess I've been living under a rock since my other vehicle is a diesel truck. Didn't know hemis had dual spark plug setups nowadays! At least the change is probably easier than the 3.6l. That sucks having to pull the top half of the intake off to get to the plugs.

JCC · Jun 27, 2019

I am guessing your setup is same as my 2011 Hemi. Just did plugs and were very easy. No chance of messing up how if wires are ran or anything. 2 bolts to remove coil pack then the 2 plugs per cylinder. Easy. Can get to all of them with little effort.

ZPirate · Jun 28, 2019

I agree. I haven't really looked at my 2019, but I'm guessing changing them will be just like changing the plugs in my 2013, except the new plugs are iridium. It's not too hard a job with the right tools. Just time consuming to change 16 plugs. LOL!

Spark Plug replacement

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