What all do I need for replacing spark plugs?

[Nicholas]

Hey so it’s my first time changing plugs what else would I need other than the plugs? Went to advanced had options on plugs, bought the more expensive ones because I felt more comfortable with paying extra for better ones I got the air filter and that’s it. Do I need new lines if they don’t look cracked or anything? Also I think I have a torque wrench but couldn’t I just use a regular wrench and socket


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[Death Wobble]

Hey so it’s my first time changing plugs what else would I need other than the plugs? Went to advanced had options on plugs, bought the more expensive ones because I felt more comfortable with paying extra for better ones I got the air filter and that’s it. Do I need new lines if they don’t look cracked or anything? Also I think I have a torque wrench but couldn’t I just use a regular wrench and socket


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You want to make sure you don’t over tighten the plugs ! Most people that has done this for years can do it by feel , but as it’s your first time around ,doing this best use your toque wrench senses you are going in to aluminum heads ! And it sounds like you want to do a full tune up ! It’s not a bad idea to change out your gas filter ! Hope this helps!

 

[Nicholas]

You want to make sure you don’t over tighten the plugs ! Most people that has done this for years can do it by feel , but as it’s your first time around ,doing this best use your toque wrench senses you are going in to aluminum heads ! And it sounds like you want to do a full tune up ! It’s not a bad idea to change out your gas filter ! Hope this helps!

Thanks, just changing the plugs and such but also tryin not to spend and ark and leg


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[The Real Lxxtsy]

few other things you can change is the distributor cap, rotor, spark plug wires

 

[Death Wobble]

Thanks, just changing the plugs and such but also tryin not to spend and ark and leg


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You also might want to inspect your serpentine belt for cracks and frays while your under the hood !

 

[JMT]

@Nicholas, if you have a spark plug socket it’s a huge help getting them out. The socket has rubber inside that holds the plug so that when you’ve unscrewed it you can actually pull it out. Otherwise very hard to pull out. They don’t require much torque. Just a little snug

 

[tworley]

...sounds like you want to do a full tune up ! It’s not a bad idea to change out your gas filter !

The TJ fuel filter is inside the tank attached to the pump, its a huge filter and considered a lifetime filter. No need to change.

OP--depending on your year and whether you have a distributor or not the two plugs that are well known to cooperate with TJs and last 100k miles are the Autolite AP985 (for a distributor) or the APP985 (distributorless). I went to the dealer for a tune-up pack, it included all new OEM wires (dont go for "performance wires", a distributor cap, rotor, oil filter and air filter. It was relatively cheap too.

 

[CodaMan]

Don't forget to use anti-seize on the threads of the new plugs, and when using anti-seize you must reduce the torque value by 20%

 

[Nicholas]

The TJ fuel filter is inside the tank attached to the pump, its a huge filter and considered a lifetime filter. No need to change.

OP--depending on your year and whether you have a distributor or not the two plugs that are well known to cooperate with TJs and last 100k miles are the Autolite AP985 (for a distributor) or the APP985 (distributorless). I went to the dealer for a tune-up pack, it included all new OEM wires (dont go for "performance wires", a distributor cap, rotor, oil filter and air filter. It was relatively cheap too.

Thank you. They looked it up on their system for the 2.5L and the one they recommended were the busche oem style ones I believe they were called. I got those. These tutorial videos are telling me to double check the gap measurements in the electos and I might get the torque wrench spark plug 5/8 socket. Also might as well just go get the worse too while I’m there. Thank everyone


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[Nicholas]

Don't forget to use anti-seize on the threads of the new plugs, and when using anti-seize you must reduce the torque value by 20%

Gracias!


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[CodaMan]

Thank you. They looked it up on their system for the 2.5L and the one they recommended were the busche oem style ones I believe they were called. I got those. These tutorial videos are telling me to double check the gap measurements in the electos and I might get the torque wrench spark plug 5/8 socket. Also might as well just go get the worse too while I’m there. Thank everyone


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Definitely check the plug gap.

 

[tworley]

Thank you. They looked it up on their system for the 2.5L and the one they recommended were the busche oem style ones I believe they were called. I got those. These tutorial videos are telling me to double check the gap measurements in the electos and I might get the torque wrench spark plug 5/8 socket. Also might as well just go get the worse too while I’m there. Thank everyone

Bosch? Do not install those. They are a great sparkplug, but not for our TJs. IIRC something about the heat range is incorrect for TJ engines. Stick with Autolite or Champion

 

[Nicholas]

Do any of you guys torque the stairs ark plugs?
Putting mine in now


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[Nicholas]

Bosch? Do not install those. They are a great sparkplug, but not for our TJs. IIRC something about the heat range is incorrect for TJ engines. Stick with Autolite or Champion

What’s wrong with these? I already bought em and installing them now


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[Nicholas]

Do any of you guys torque the stairs ark plugs?
Putting mine in now


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Never mind^ and I meant to say “torque your spark plugs” I type way too fast need to slow down


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[tworley]

What’s wrong with these? I already bought em and installing them now

I cant remember specifics but its something to do with the heat range with them. Plenty of documented threads of people having issues with Bosch (think misfires)

 

[xackley]

anti-seize the threads is important, also a little di-electric grease on the inside of the rubbers on the spark plug caps. This will be greatly appreciated in 5 or 10 years when it is time to check them again.
I also use a little di-electric grease around the rim of the distributor cap. A little water proofing might come in handy some day.
While at the distributor, pull the wires one at a time, clean any corrosion, and once again, apply just enough di-electric grease to keep the moisture out.
If you are not sure what you are looking at, automatically replace the rotor and cap.
Save all the parts that you replace, they could come in handy for testing if you ever develop a mis-fire.

Do not use the ratchet to start inserting the spark plugs. Using the socket and extension is perfectly ok. but you want to make sure that the threads are aligned and screwed in a half dozen times until snug using fingers to twist. Then grab the ratchet for the final torque down.

 

[Jerry Bransford]

One more hint, use nothing larger than a 3/8" ratchet wrench to tighten spark plugs. That limits the amount of torque that can be applied to nearly eliminate the ability to overtighten the plugs. I don't use a torque wrench, just common sense "good and snug" is fine for spark plugs.

Agreed on the recommendation to use Autolite or Champion, NGK Is good too. Bosch plugs are a compromise in that they don't have the exact heat range that works well for our engines. That came from a Bosch engineer several years ago. Autolite's platinum AP-985 or iridium XP-985 are good choices, as is Champion's 3034 platinum. Platinums are good for 100k miles, the XP-985 from Autolite will perform well for 200k miles.

 

[Nicholas]

Thanks everyone for the support I ended up taking in some of what was said and went back to advanced auto parts and got a new cap just to be on the bright side of just assuming, it was actually bad inside and the rotor center electro thing inside I had to clean that all as well. Plugs didn’t really seem too bad I guess but they were rusted a bit and there was a crack in one of the wires. Also did the oil change

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[SOMD-JeepFan]

The Bosch plugs come gapped already for the vehicle, so you don't have to worry about gapping the plugs. I was not aware of the issues with Bosch plugs, but I am new to the Jeep world. I already bought a set, but I may take them back.