Changing Spark Plugs - 3.7 Discussion - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 124 (permalink) Old 06-20-2008, 05:36 PM Thread Starter
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Changing Spark Plugs - 3.7 Discussion

So, I haven't seen anyone say...

What is the proper gap for the XK? I have the 3.7L so changing the sparkplugs shouldn't be as difficult as the 5.7L.

Like Haags, I haven't changed my own spark plugs since my 83' Monte Carlo...

AJGuy84, that tool is very interesting. I'm gonna have to check to see if they are available at Autozone.
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post #2 of 124 (permalink) Old 06-25-2008, 04:31 PM
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3.7L Platinum spark plug upgrade

alright so i am looking into changing the plugs on my veh.//. it curently does not have platinum plugs. I am just curious if there is any issue with replacing the non platinum plugs with platinum maybe i will get a little better gas mileage since it will be a better and cleaner spark, Has anyone installed platinums in there 3.7l xk. help...
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post #3 of 124 (permalink) Old 06-25-2008, 09:32 PM
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I am curious also keep toying with the idea but havent committed.
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post #4 of 124 (permalink) Old 06-26-2008, 12:46 AM
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I just found out that the 3.7L engines have the NGK V power plugs. That does sound better than Champion, but they still are the low end plugs. Can anyone help me out on this situation.

I have heard that the dealers would like to stick with the OE plugs because the Jeep engines do get hotter and because the computer will not work with different plugs.

I can't believe that.
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post #5 of 124 (permalink) Old 06-26-2008, 01:21 PM
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Quote:
Originally Posted by bob123
I just found out that the 3.7L engines have the NGK V power plugs.
That's surprising. How did you find this out? Did you pull a plug yourself or find an official source for the information?
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post #6 of 124 (permalink) Old 06-26-2008, 02:30 PM
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Quote:
Originally Posted by bsnyder717
alright so i am looking into changing the plugs on my veh.//. it curently does not have platinum plugs. I am just curious if there is any issue with replacing the non platinum plugs with platinum maybe i will get a little better gas mileage since it will be a better and cleaner spark, Has anyone installed platinums in there 3.7l xk. help...
Get the NKG's. Not to mention they are 100,000 miles plugs so you won't have to change them for a while.
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post #7 of 124 (permalink) Old 06-26-2008, 02:33 PM
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the plugs that are in the 3.7L are non platinum they are basic champion plugs. CRAP.. lol that is why i am interested in replaceing the plugs with a platinum or maybe NGK i was jsut curious if any one has done this and had problems or how the truck ran?
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post #8 of 124 (permalink) Old 06-26-2008, 04:34 PM
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Which NGKs do you get... There are 4 options I guess not 100% sure. Iridiums or Platinums.
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post #9 of 124 (permalink) Old 06-26-2008, 05:21 PM
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Quote:
Originally Posted by AKFossil
Which NGKs do you get... There are 4 options I guess not 100% sure. Iridiums or Platinums.
Get the Iridiums Part# ZFR6FIX-11 They are worth it cause they will last way longer than the coppers.

Iridium

Iridium is a precious metal that is 6 times harder and 8 times stronger than platinum, it has a 1,200(=F) higher melting point than platinum and conducts electricity better. This makes it possible to create the finest wire center electrode ever. Prior till now, platinum had been favored for long life or performance spark plugs due to its high melting point, also the technology did not exist to machine and bond iridium on a spark plug electrode(at least in a cost effective manner). Iridium industrial spark plugs have been around for years, but still sells for over a hundred dollars per plug. Just now is the technology available to effectively use iridium in a spark plug for automotive applications. The strength, hardness and high melting point of iridium allows NGK to manufacture their iridium ultra-fine wire center electrode to 0.7mm. One of the finest firing points in the industry! (Thus far there has been no problems reported regarding use of iridium plugs with nitrous oxide.)

http://www.ngk.com/results_app.asp?AAIA=1433829

Last edited by Bo185; 06-26-2008 at 05:24 PM.
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post #10 of 124 (permalink) Old 06-26-2008, 05:23 PM
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They come pre-gap you will damaged the tips if you move them.
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