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I'm going to change my plugs this weekend, after almost 18 months, but only 14,000 miles. I just always change plugs annually, no real reason.
I am wondering why people say the gap should be .045. My owner's manual and the sticker under the hood say .043 (1.1mm).
 
Well I did .043, but as in my previous post, the old ones that came out were several thousands either way. They were dirty, but didn't look burnt like those plugs from the '60s used to with the built-up crud in the gap. Also the coil assembly may resist when you remove it -- mine was a pretty snug fit.

Oh, and Schoat333, thanks for the helpful hint about using the coil assembly to start threading the new plugs. Works well.
 
Don't worry about the tightening part. Just hand tighten the plugs, then use the socket wrench to go another 1/2 to 3/4 of a turn, then move on. It's not that hard, and if you do it yourself, you'll spend about $2 per plug, a couple more for connector grease and a gapping tool. The dealer is going to hit you for $50 or better.
I've been changing my plugs for 25 years and never used a torque wrench, and managed never to mess anything up. You'll do fine.
 
My dealer said $150, so I did it myself. For $50 I would have let them do it. The parts store is within seeing distance of the dealership. My cost was about $20 including the extension I needed for my socket set.
 
My dealer said $150, so I did it myself. For $50 I would have let them do it. The parts store is within seeing distance of the dealership. My cost was about $20 including the extension I needed for my socket set.
$150? Now that's rape. Even $50 is pretty bad, considering the plugs are less than $3 a pop.
 
Just a heads up on the gap for the 2.0L engine, Checker says they should be at .40 and the NGK's were at .35 out of the box. Ill double check again in the manual but those are the numbers I'm getting so far.
 
I forgot I had posted here!

I changed the spark plugs on my dad's Caliber. I had to adjust the gap on the NGKs as well, but everything else went fine. My dad reports the engine is running smmother and the car is using less fuel. As soon as my Patriot reaches 30,000 miles, I'll be changing its spark plugs.

Thanks a lot for the instructions, Schoat333. :smiley_thumbs_up:
 
I changed my plugs this weekend. I wonder why the plugs look so nasty? Per the NGK instructions it said 1/2 to 2/3rd rotation after finger tight. So I went for the 1/2 turn.

Also I used an allen wrench since I didn't have a Torx in that size. It worked.

I was unable to start the plugs with the coil pack, it didn't seem to want to clear the mounting post when I turned it so I had to lower it down and shake it free from the coil boot and then finger tightened it with the socket.
 
We just put some NGK Iridium plugs in today. They are gapped at .043" as per the manual stating for the 2008.
Got them at Auto-Zone for 4@ $6.99/ea and a pack of anti-seize for good measure.
Anyone else try the iridiums yet? Thoughts?

I may go make a thread asking that same two part question above.
 
Wow! I feel stupid as I didn't realize you ought to change the plugs at 30,000 miles as I am use to 50,000 or so!

Thanks for the well written article. I have a 2009 with the 2.0 motor so I am thinking about getting it done ASAP.

Any thoughts about types of plugs?

Thanks in advance.
 
Wow! I feel stupid as I didn't realize you ought to change the plugs at 30,000 miles as I am use to 50,000 or so!

Thanks for the well written article. I have a 2009 with the 2.0 motor so I am thinking about getting it done ASAP.

Any thoughts about types of plugs?

Thanks in advance.
OEM NGK plug# ZFR5F-11

i feel stupid too, 2009 patriot with 49k. only done oil change
 
I just changed my plugs yesterday after 65K and they were toast. The plugs were actually easy to change, except my socket keep getting hung up on the plugs after reinstalling them and it took 4 or 5 tries to get the socket out.

I used Champion copper plugs and they were gapped right at .044 out of the box.
 
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