The type of spark plug for Chrysler Pacifica 2017+

Pawel said:

Dear friend,
I would like to replace the spark plugs in my Pacyfica. When I replaced spark plugs in my Chrysler Town and Country 2013 I bought Champion CCH9407, it is RER8ZWYCB4. I bought the same type of spark plug for Pacifica 2017, because the engine is the same 3.6V6. But when I put out the first spark plug I observed that there is other type, it is RER8ZWYPB4. I found that it is probably Champion CCH9417. Can I use CCH9407 for my Pacyfica? Or should I bought CCH9417? What is difference between these two types of spark plugs?
Have a nice day,
Pawel

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The older Grand Caravan/Town & Country does not use the same engine as the Pacifica. The former has a 2nd generation Pentastar 3.6L engine while the Pacifica uses a 3rd generation variant with a few major changes.

The ground electrode core material is nickel copper alloy on the 9407/RER8ZWYCB4 plug. The ground electrode core material is platinum on the 9417/RER8ZWYPB4 plug. They appear to be identical in every other regard.

I'm thinking the older plugs would probably work fine, but I wouldn't be willing to install them to find out. Chrysler changed the ground electrode core material for a reason. They wouldn't have done so if it wasn't advantageous in some way, shape, or form. You need to remove the intake plenum to install the front bank of plugs. I wouldn't want to do that twice if the older plugs were problematic, but I wouldn't think lesser of you for giving them a shot if you already have them. The worst that could happen is they might cause some misfires. That seems unlikely, but I can't say it's impossible either.

Only replace with the same factory plug. Resistance is different between part numbers and you can throw engine codes and cause all kinds of problems like timing issues and severe carbon buildup. Center electrodes are different. Also, the ground electrode metal is different.

9407: ChampionIndustrialPlugs.com: RER8ZWYCB4 $7.70 Champion 9407 Iridium Spark Plug - Best Car SparkPlug Replacement

• Center Electrode
• Material Iridium
• Type Fine Wire
• Size 0.8mm
• Projection Extended Projection
• 
  
• Ground Electrode
• Material Nickel
• Type Standard
• Shape Taper Cut
• Quantity 1
• 
  
• Specifications
• Resistor Yes
• Resistor Type SAC9
• Heat Range 8
• Features Extended metal shell
• Torque SpecsCast Iron: 10-18 lb. ft. Aluminum: 10-18 lb. ft.

9417: ChampionIndustrialPlugs.com: RER8ZWYPB4 $7.55 Champion 9417 Iridium Spark Plug - Best Car SparkPlug Replacement

• Center Electrode
• Material Iridium
• Type Fine Wire
• Size 0.8mm
• Projection Projected
• 
  
• Ground Electrode
• Material Platinum
• Type Standard
• Quantity 1
• 
  
• Specifications
• Resistor Yes
• Heat Range 8
• Features Extended metal shell
• Torque SpecsCast Iron: 10-18 lb. ft. Aluminum: 10-18 lb. ft.

lordfly911 said:

I am getting conflicting information on this. One place says 30K to 40K, other says 30K to 90K, other says 100K. We really need to get this nailed down. Plugs do wear out and these engines don't run smoothly anyway. So it is difficult to tell. I guess I will just do the oil and alignment check and just ask the dealer what they say.

I would suspect on a hybrid 100K would be acceptable, but a gas only, humm.

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Most newer gas engines since the mid-2000s (including the 3.6L used in the Pacifica) come with Iridium spark plugs that have a 100k mile service interval. Some Toyota engines actually have a 120k mile interval specified for spark plugs. YMMV, but firsthand experience has shown that iridium spark plugs will last much longer than 100k miles. I've changed a few sets of iridium spark plugs on other vehicles near 100k miles. They showed a little wear, but had almost no gap erosion. Our second vehicle currently has 109k miles on it's second set of iridium plugs, and it still runs great. I'll probably pull the front three out soon just to check them because it's fairly easy, but as it stands right now I have no plans to change them again until the engine starts misfiring. Admittedly, this is mainly because I don't plan on keeping it much more than another year or two.

The hybrid and gas Pacifica engines use the same spark plugs. Chrysler recommends replacing them every 100k miles. As others have already mentioned, this is specified in the owners manual.

Tomek1962 said:

Hello Pawel
Have you changed the spark plugs yet? If not, would you please take pictures of the individual work steps? That would be great That would help me and certainly others when changing spark plugs.

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Hello Tomek,
As I wrote I replaced only one spark plug and observed that My new spark plugs are not the same. I am waiting for right type of park plugs. Unfortunately I can not give you tutorial because all is disconnected now. I learn youtube. It is this link youtube (Chrysler Pacifica Spark Plugs 3.6 Pentastar tune up TIP. Fuel Pressure sensor. Intake manifold P018C - YouTube). When I will finish my job I will give you my experience.
PS. I bought my car from USA and transfered it to Poland. And I do not know about service. I am try to checking some systems like brakes, oil, coolant, filters... I am thinking now about cleaning throttle and mass flow sensor - I do not observe, that something is wrong with the angine. But when I have all disconnected it is easy to clean something like mass sensor, throttle (it is some dirty, not so much). Or something I should "clean", to set up??? How do you think? Or when it is OK I should do not touch it ??? The engine is 100kkm now and I do not think that somebody did this.