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Old 03-15-2013, 10:23 AM   #1
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Spark Plug Torque

Since it is supposed to be decent weather out this weekend, I am planning on changing my spark plugs. I have already determined I am going with the Champion Double Platinum 7034. My question is what lb. of torque do you tighten these to when you install them? I've tried searching the forum and couldn't find that information, just back and forth comments on which plug to use. Any help would be appreciated. Thanks,

Trent

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Old 03-15-2013, 10:25 AM   #2
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I just snug mine. Never bothered to torque them and never had an issue. Just don't strong arm them.

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Old 03-15-2013, 01:10 PM   #3
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Originally Posted by Timberline View Post
I've tried searching the forum and couldn't find that information, just back and forth comments on which plug to use.
Searching the FSM would likely be more productive.

27 ft/lbs for the 2.5L & 4.0L engines.
28 N/m for the 2.4L engine. (21 ft/lbs in round figures.)
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Old 03-15-2013, 01:30 PM   #4
Knows a couple things...

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I just snug mine. Never bothered to torque them and never had an issue. Just don't strong arm them.
Using a 3/8" ratchet wrench to get them tight will be fine. That size wrench limits how much torque can be applied. Using a 1/2" ratchet wrench on the other hand could easily allow you to overtighten them.
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Old 03-15-2013, 02:49 PM   #5
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Thank you for the input, much appreciated.
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Old 03-15-2013, 04:53 PM   #6
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Quote:
Originally Posted by Jerry Bransford
Using a 3/8" ratchet wrench to get them tight will be fine. That size wrench limits how much torque can be applied. Using a 1/2" ratchet wrench on the other hand could easily allow you to overtighten them.
Here's two of my 3/8" ratchets, and a 1/2" on the left. Just saying.

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Old 03-15-2013, 05:37 PM   #7
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Here's two of my 3/8" ratchets, and a 1/2" on the left. Just saying.
You are quite right. What matters most is the length of the wrench, not the size of the drive.

I will give 10:1 odds that anyone asking for a torque value has a torque wrench available, which makes relying on stab-in-the-dark shade-tree shenanigans pretty unnecessary.
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Old 03-15-2013, 05:45 PM   #8
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Well I just came back in from changing out the plugs. Everything went off without a hitch!! When I pulled the old plugs, it seems the PO used Champion RC12ECC Plugs. I also noticed that the old plugs had a bit of a shorter ceramic neck area compared to the 7034 plugs I put in. Hopefully that is of no concern. Curious as to if anyone has any words on those plugs that I pulled out from what the PO had in the TJ?? Not sure how old they were but glad I did the repair. The Jeep fired right up and so far has a nice solid idle. Going to head out soon and drive it to see if I notice a difference.
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Old 03-15-2013, 05:55 PM   #9
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Here's two of my 3/8" ratchets, and a 1/2" on the left. Just saying.
lol right I could snap the head of a plug or rip the threads out of the head with a 1/4 ratchet if the angle of the dangle was just right.

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