Replacing sprk plugs, how big of a pain will it be?

[Advntrbound]

Almost 100k miles on the 3.6l. Oil changes at 5k, air filters when needed, otherwise I haven't performed any other preventative maintenance on the engine. Any tips, tricks or suggestions? Ill go ahead and pick up a PVC valve.
I miss my old k5 blazer, I could stand in the engine bay and swap the plugs out in 15 minutes.

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[CyberShanks]

I changed plugs in my wife's JKUR probably 5 years ago when she hit 100k. The passenger side is a piece of cake, drivers side, not so much... Intake manifold has to come apart which isn't really a huge complicated deal, just adds some bad words and takes lots more time. I don't believe the 3.6 has changed a terrible amount over the years and likely the same process with the JTs. I do ALL of my own maintenance/upgrades on everything I own and even knowing what I knew with the plugs, I have since bought 2 more 3.6s since.

Advise would be to just take your time, maybe take some pictures, and have some beer on standby for afterwards.

Jim

 

[ScottBeach]

https://www.jeepgladiatorforum.com/forum/threads/spark-plug-replacement.65456/

 

[Punisher1-1]

Almost 100k miles on the 3.6l. Oil changes at 5k, air filters when needed, otherwise I haven't performed any other preventative maintenance on the engine. Any tips, tricks or suggestions? Ill go ahead and pick up a PVC valve.
I miss my old k5 blazer, I could stand in the engine bay and swap the plugs out in 15 minutes.

Its not terrible but it does require removing the upper intake plenum to access the driver side plugs. I did mine 2 weeks ago and took about 6 hours taking my time and inspecting everything while I had the intake off. I replaced the upper intake plenum seals and the VVT solenoid seal that I discovered was leaking oil when I had everything off. I also had one of the ignition coil boots that was torn and had to replace it. I would have a couple spare boots and definitely replace the VVT solenoid seals "Genuine Mopar Seal Right Side 4893803AA" (both left and right are the same). The seal that was leaking was so rigid when I squeezed it, it remained in the same shape (rubber shouldn't do that). A trick for the PCV valve is to put a deep well socket over the tube coming off the PCV to give you leverage when twisting it towards the passenger side.

 

[Hootbro]

Attached are the OEM instructions for the upper intake removal, coils and spark plugs. Looks like a lot but it really is not that bad. Took me maybe 4-5 hours at a leisurely pace taking my time. Like anything, first time is the learning curve and you will be able to halve it next time.

 

[Advntrbound]

Thanks for the replies. I wrench on my own vehicles. Just changed out the thermostat on our QX60..all the bolts are blind, that was fun. I forgot about the VVT seals. One of mine is leaking.

 

[Minty JL]

Yeah very much a DIY job.

 

[Splenda]

I changed plugs in my wife's JKUR probably 5 years ago when she hit 100k. The passenger side is a piece of cake, drivers side, not so much... Intake manifold has to come apart which isn't really a huge complicated deal, just adds some bad words and takes lots more time. I don't believe the 3.6 has changed a terrible amount over the years and likely the same process with the JTs. I do ALL of my own maintenance/upgrades on everything I own and even knowing what I knew with the plugs, I have since bought 2 more 3.6s since.

Advise would be to just take your time, maybe take some pictures, and have some beer on standby for afterwards.

Jim

At 100k miles, would you recommend doing coils too?

 

[CyberShanks]

I stuck an x-factor 2.5" rock krawler kit on her rig about that time too (so yep). Before that, we were running budget boost, shock extensions, factory rubi coils/arms and 35" duratracs. Fully belly armor, PSC flat fenders and brawler rockers, and the thing performed admirably. After the x-factor, it does things it probably shouldn't be doing. Still has a hard keeping up with my rig though..

 

[Splenda]

I stuck an x-factor 2.5" rock krawler kit on her rig about that time too (so yep). Before that, we were running budget boost, shock extensions, factory rubi coils/arms and 35" duratracs. Fully belly armor, PSC flat fenders and brawler rockers, and the thing performed admirably. After the x-factor, it does things it probably shouldn't be doing. Still has a hard keeping up with my rig though..

I was referring to the six coil packs that coincide with the six spark plugs.

 

[CyberShanks]

That would certainly make a whole lot more sense... Happy Monday.

I didn't replace hers at that time, still haven't, she has 150k on the clock now.

Jim

 

[Minty JL]

At 100k miles, would you recommend doing coils too?

I simply would because I'm already in there and don't want to waste the time and money on pulling it apart again 20k miles later to replace a coil. 100k and done......also make sure to use OEM or Denso coils. Cheap coils are cheap for a reason.

 

[Advntrbound]

So today was the day. 60 degrees, sun was shinning, my wife was at work and the kids in school. 3.5 hours total from setting up the table and tools to cleaning up and going for a test drive. I also swapped out the pcv valve. 100k miles and they were definitely in need of replacement. For some reason I can't upload pics from my phone. I'll upload some from my laptop shortly.

 

[MojaveLawyer]

Just did this.. Took me about 6 hours, taking my time, and taking everything apart and cleaning throttle body flip too. Not too bad.

Avoid using the T spark plug tool. I beat the crap out of my hand with it rubbing against other parts.

 

[Advntrbound]

Just did this.. Took me about 6 hours, taking my time, and taking everything apart and cleaning throttle body flip too. Not too bad.

Avoid using the T spark plug tool. I beat the crap out of my hand with it rubbing against other parts.

I used a 6" extension. The 2 "pins" (studs) that hold the upper manifold on the driver side gave me some fits. But I finally got it back together, there just isn't a lot of room to work with. Looks like you want aftermarket coils.

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