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Old 03-06-2010, 08:45 AM   #1
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Spark plug gap

Anyone know what the plug gap on a 2000 wrangler 4 cyl 2.5L should be ?

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Old 03-06-2010, 09:27 AM   #2
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Should be under the hood.

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Old 03-06-2010, 10:24 AM   #3
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The 2.4L is 0.40.
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Old 03-06-2010, 10:38 AM   #4
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Straight out of the service manual for the 2002 Wrangler...I'd imagine it's the same on yours.

Engine: 2.5L
Type: RC12ECC
Gap: 0.89 mm (0.035 in.)
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Old 03-06-2010, 11:47 AM   #5
Knows a couple things...

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.035 is correct though I don't think I've had to adjust the gap for new plugs in years. It seems the plug makers are pretty good about pre-gapping them for the application they fit.
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Old 03-06-2010, 11:52 AM   #6
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Quote:
Originally Posted by Jerry Bransford View Post
.035 is correct though I don't think I've had to adjust the gap for new plugs in years. It seems the plug makers are pretty good about pre-gapping them for the application they fit.
This is true, I always check my new plugs before installing them and they never required adjustment, as they were all pre-gapped to the .035 spec. I discovered this was consistent between NGK, Champion, and Autolite.
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Old 03-06-2010, 08:55 PM   #7
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Thanks Guys , they are "pre-gapped" at .035 but i wanted to double check since I dont have the manual.
Thanks For the help
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Old 03-06-2010, 08:59 PM   #8
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I've noticed this as well...dang, and I thought I was just getting lucky. lol
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Old 08-24-2010, 06:12 AM   #9
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Still, it doesn't hurt to check the gap, it takes 2 seconds per plug.

I just changed the plugs on my new-to-me LJ. Found one out of the box that was at .020, instead of .035.

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